1. Compilation basis
1. 1 According to the tender documents of the fire protection installation project of the Art Center provided by the owner.
1.2 tendering and answering questions for fire protection installation project of art center.
1.3 according to the design instructions and construction drawings provided by the owner.
1.4 According to relevant national design and construction codes and local codes.
The specifications for implementing this project are:
GB 50045-95 Code for Fire Protection Design of High-rise Civil Buildings (2005 Edition)
GB50067-97 Code for Fire Protection Design of Garage, Repair Garage and Parking Lot
GB50222-95 Code for Fire Protection Design of Interior Decoration of Buildings
JGJ57-2000 Code for Design of Theater Building
Code for design of automatic sprinkler system (2005 edition) (GB50084-200 1+0)
GB502 19-95 code for fire protection design of water spray fire extinguishing system.
GBJ 140-97 Code for Design of Fire Extinguishers in Buildings
GB50 1 16-98+06-98 code for design of automatic fire alarm system.
JGJ66-9 1 Code for Design of Museum Buildings
Code for construction and acceptance of automatic sprinkler system (GB5026 1-05-05)
GB50 166-92-92 Code for Construction and Acceptance of Automatic Fire Alarm System
Other relevant fire protection system acceptance specifications issued by other countries; If there is a new version of the above specifications, the new version shall prevail.
2. Project overview
2. 1 project overview
* * Art Center is designed by * * * Design and Research Institute, and consists of 1700 Grand Theater, 81Concert Hall, 385 Small Theater, Art Museum, Art Museum and its corresponding rehearsal hall, parking lot, public service room, traffic auxiliary room and other auxiliary facilities, with a total construction area of about 75,300 square meters. The tallest building is the Grand Theatre, with three floors underground and eight floors above ground, with a building height of 42 meters.
The fire protection category of this building is a high-rise civil building, and the fire resistance rating of the building is Grade I. ..
2.2 fire engineering content and configuration
* * See the fire plan, system diagram and corresponding design description for an overview of the functions of each system in the fire protection project of the Art Center. The bidding content mainly includes the following systems:
Outdoor ring fire pipe network and hydrant system, indoor hydrant fire extinguishing system, dry or wet automatic sprinkler system, deluge system, cooling water curtain protection system, sprinkler system, gas fire extinguishing system, fire detection and alarm system, fire linkage system and fire shutter system.
2.3 Engineering characteristics
This project is a high-rise and large-scale public building with unique design, high decoration standard, perfect internal fire-fighting facilities, advanced technology, high fire-fighting grade and high safety and reliability requirements. The fire fighting system has a large amount of work, a short construction period and many overlapping operations.
(1) The installation area of this project is large and the installation space is high. Large-space and long-span projects will make the construction technology more difficult during the construction process, and at the same time, the requirements for construction safety measures are also higher.
(2) The construction period of this project is short, and there are inevitably many types of cross-jobs in the construction process. The construction of civil engineering, decoration and fire protection projects have great influence on each other. Once the coordination is not good, it will affect the construction period of the whole project, so the coordination work on site is needed.
(3) The short construction period is a great test for material supply. It is very difficult to purchase and transport a large number of qualified and high-quality equipment and materials in a short time, and it needs strong capital in the use of funds.
(4) This project has high quality requirements, and the general project quality requirements are qualified, striving for the Luban Prize, which requires us to adopt advanced management mode, advanced construction technology and qualified construction team to carry out the project construction in a reasonable and coordinated manner.
(5) This project not only needs to coordinate the cross operation of multiple types of work on site, but also involves the coordination and cooperation of the owner, supervision, design, general contractor, integrator, fire protection, local quality inspection and other departments.
3. Construction organization and construction preparation
3. 1 construction organization
Staffing of on-site management institutions
* * Art Center is a landmark building with international standards, which has a great social impact. Our unit will work out practical safeguard measures according to the construction experience of many large-scale fire protection projects such as * * *, and fully cooperate with general contractors, integrators, equipment suppliers, civil engineering, decoration, supervision, designers and owners to ensure the quality and quantity of the project to be completed on schedule. Our company takes Comrade * *, the company's legal person and chairman, as the chief commander, and establishes the construction headquarters of the fire protection installation project of * * Art Center. Under the leadership of the headquarters, the fire control system engineering construction site project management department was established, the national first-class project manager and senior engineer were appointed as the chief engineer, and professional engineering and technical personnel with rich construction experience were selected to form a strong project management organization, and the construction was organized in strict accordance with the project method.
(1) project management
The on-site construction shall be the responsibility of the national first-class project manager. The project management department of the fire protection installation project of * * Art Center consists of the chief project engineer, technical director, professional builder of fire protection system, full-time quality, safety officer, mechanical administrator, planning and data administrator, contract and budget administrator, financial administrator and material engineer. The responsibilities of the main construction personnel are as follows:
Project manager: on behalf of the unit, perform all responsibilities and obligations to the owner in the construction contract, be fully responsible for mobilizing the labor force and machinery and equipment on the construction site, fully implement the work plan and rules and regulations formulated by the headquarters, comprehensively organize and coordinate the construction work in various construction areas, and ensure the realization of the project progress, quality and construction budget.
Chief engineer of the project: responsible for the technical quality of the whole project. In the process of construction, under the supervision of the project manager, the project is often inspected to make each project meet the requirements of drawing design specifications and ensure the construction quality. In addition, he is also responsible for all the layout of the construction site, contacting the design institute and Party A for site design changes, explaining the changes, making judgments and suggestions on whether the project needs support, and having the right to stop illegal construction operations. Preside over the joint review of engineering design, and organize the preparation of construction organization design or work instruction. Formulate organizational measures to ensure quality, lead the technical training and inspection of the project, and review the completion data. Responsible for handling major quality accidents, drawing up or approving engineering repair plans, organizing quality research, and proposing technical measures to improve engineering quality.
Assist the project manager in the daily management of this project.
3. 1.2 production resource plan (labor force plan, construction machinery turnover)
According to the characteristics of fire-fighting facilities in this project, the situation of on-site construction progress and the cross state of the whole construction, according to the entry situation of various fire-fighting majors and the requirements of the owner for the construction period, the labor employment plan and the turnover situation of the construction machinery to be invested are compiled, and the labor force and construction machinery are organized to enter the construction site as planned.
3.2 Construction preparation
3.2. 1 Construction technical preparation
(1) Before construction, do a good job of internal joint review of drawings of various systems of fire protection engineering, and review the drawings according to the audit opinions of the fire department on this fire protection system engineering. The part of our secondary deepening design must be implemented in the construction to ensure the effectiveness of the drawings of various fire protection systems.
(2) Organize engineers and designers to deepen their familiarity with the design drawings, master the design points and construction technology standards of the art center, and conduct design disclosure and blue prints.the design with the owner, design unit, supervision unit and subcontractors.
(3) Further refine the construction scheme of each fire protection system, adjust the construction organization design, organize engineers and technicians to make technical disclosure to the construction personnel, be familiar with the construction technology, detection, test and debugging scheme of each system, and clarify the inspection specifications and evaluation standards of fire protection engineering of each system.
(4) Formulate technical documents, technical measures and safety operation procedures to ensure the engineering quality, and prepare quality acceptance plans and safety inspection procedures to ensure the engineering quality is qualified. Prepare for the establishment of Luban Award for the whole project.
(5) Complete various test record samples and forms required by technical documents and completion data, and prepare plans and materials for pressure testing, flushing, testing and debugging during construction.
(6) Preparation of equipment technical documents.
(7) Design the selection of supports, hangers and supports, and make samples for the owner, designer and supervisor to choose.
Construction site preparation
At the designated site, according to the unified arrangement of the owner, determine the materials, warehouses and yards of our unit, the location of on-site material processing and equipment placement, living and office facilities, and roads for electricity and water consumption for living and construction.
3.2.3 Preparation of construction machinery
Doing a good job of mechanical scheduling balance and equipment maintenance before entering the site in advance will greatly improve the level of mechanical construction, ensure that construction equipment enters the site on time, and ensure that the construction period is completed on time.
Preparation of construction materials
(1) schedule, material and equipment plan and mobilization schedule.
(2) It is stipulated to inspect various materials: collect factory certificates and test reports.
(3) Order all kinds of main materials and auxiliary materials and sign contracts.
(4) All kinds of materials and auxiliary materials should be approved by the owner, design unit and supervisor.
(5) Protection of all kinds of materials entering the site and protection measures of stacking area.
4. Construction layout and construction scheme
4. 1 Construction Layout
According to the engineering characteristics and site construction conditions, the construction layout is as follows:
This project starts from the time agreed in the commencement notice issued by the supervision engineer. The commencement report of this project is submitted by us, and it will enter the site for construction after being approved by Party A and the supervision engineer. According to the order of underground first, above ground, indoor first, outdoor first, main pipe first, and auxiliary pipe later, the pipeline construction will be carried out from bottom to top with civil construction. According to the system composition: (1) outdoor annular fire pipe network and fire hydrant system; (2) Indoor fire hydrant system; (3) automatic spraying system; (4) cooling water curtain protection system; (5) water spraying system; (6) Fire shutter system; (7) Automatic fire alarm system; (8) Gas fire extinguishing system; Eight parts of the organization construction, detector, fire hydrant box, water gun installation and decoration simultaneously; After the pipeline pressure test, flushing and leak test are qualified, the whole fire protection system enters the system debugging. After the system debugging, enter the overall linkage debugging.
4.2 Construction scheme
All purchased equipment and self-supplied equipment need factory production and factory inspection. Ensure that the equipment delivered to the site is qualified, brand-new and advanced. The whole fire-fighting engineering pipeline is organized by the scheme of on-site processing and on-site installation, that is, the clamp interface and threaded interface of the fire-fighting water system pipeline, the pipe network connection of the fire hydrant system, the bracket made by machinery on site, the manually installed pipeline on site, the manually installed wiring and the manually installed alarm equipment. During the construction of large space system, scaffolding and safety protection are used simultaneously. Before entering the site, the construction plan should be re-compiled, and submitted to the owner for approval and implementation after being reviewed by the general contractor and the supervisor.
5. Technical organization measures to ensure the construction period
5. 1 construction schedule
According to the engineering characteristics and on-site construction conditions, the total construction period of fire protection system engineering is 170 calendar days (which can be further arranged reasonably according to Party A's requirements). See table 3. 1 1 for details.
5.2 Construction progress guarantee measures
(1) In order to ensure the construction progress and time limit for a project, and make the installation cooperation keep up with the requirements of civil construction progress, the project department will be equipped with skilled construction technicians and management personnel to prepare the construction plan and budget in time. Prepare well before construction and coordinate with other units, prepare materials, machines and tools, do a lot of temporary work, mobilize labor force, coordinate internal and external construction, and do a good job in construction quality and safety production management.
(2) This project has a wide construction area and a large workload, and can organize effective multi-stage comprehensive construction. In order to establish credibility, under the premise of ensuring the installation quality, efforts are made to shorten the total construction period to ensure the realization of the overall progress of the installation project. Project network node diagram and project construction master schedule will be adopted for schedule control. Strictly control the timely completion of network planning nodes, and make plans according to network planning nodes. At the same time, each team and construction team should complete the specific installation tasks in blocks, so as to meet the quality standards with measures and time requirements.
(3) Before construction, be fully familiar with the design and construction drawings and related technical quality requirements, construct strictly according to the drawings under the technical handover of the design unit, and carry out the construction according to the requirements of technical quality acceptance specifications. If there is any change, the owner must be consulted to ensure the engineering quality of Henan Art Center.
(4) Strictly implement the fire prevention and security system for production safety on the construction site, and the hot work on the construction site, especially in the decoration stage, shall be approved and renewed in strict accordance with the fire prevention system.
(5) Strengthening the coordination with the general contractor and subcontractors, and carrying out reasonable crossover operation as far as possible can shorten the construction period of the installation project and other construction contents, thus shortening the total construction period, and reducing the delay and failure to finish the project on time caused by work accidents.
(6) Strengthen the control of the mobilization plan of materials, equipment and machines, and avoid the slowdown caused by the delay of mobilization time, which will lead to the extension of the construction period.
(7) The arrangement of labor force must meet the construction progress, especially skilled workers, and the construction must be carried out in strict accordance with the construction progress. If other external reasons affect the construction period, they must work overtime to meet the engineering requirements. From all aspects, it is guaranteed that the fire protection system project can be constructed with the fastest progress on the premise of ensuring quality.
(8) Adopt reasonable and advanced engineering construction technology and auxiliary equipment as far as possible, such as the construction equipment for the ultra-high part of large space: use hanging basket type and integral mobile independent scaffolding. Ensure the safety of operators and carry out construction under the condition of safe facilities.
(9) The mobilization plan of equipment and materials must meet the requirements of the construction progress, and the equipment shall be ordered to enter the site in advance so as to have sufficient time to prepare.
(10) Fully prepare the funds to ensure that the funds for this project are earmarked. Our company will invest a certain amount of funds in a short time to ensure the smooth completion of the construction period.
(1 1) Combined with our construction experience in many exhibition centers, airport terminals, gymnasiums and large space projects; In view of the tight construction period of Henan Art Center, our unit will carry out the construction in strict accordance with the requirements of the owner. In view of the difficulties in the construction of this project, the quality hidden dangers that may be left by multi-unit construction cooperation and pre-embedding, the difficulties in pipe network layout caused by the change of large space modeling, and the influence of paint color matching and decoration effect, a targeted single construction scheme is formulated to overcome technical problems and ensure the smooth and timely completion of the construction.
6. Main construction methods and technical measures
6. 1 Main construction procedures
6. 1. 1 construction process of fire alarm system
6. 1.2 indoor fire hydrant system, the main construction process is:
6. 1.3 construction technology of closed automatic sprinkler system
6. 1.4 construction technology of fire shutter door
6. 1.5 construction technology of gas fire extinguishing system
6.2 Main construction methods
According to the project, it is divided into two parts: pipe network construction and equipment installation.
6.2. 1 Pipeline and pipe network construction method
(1) Fabrication and installation of bracket
In order to ensure the engineering quality, all the brackets except those specified in the design are manufactured and installed according to the national standard S 16 1, and all brackets are painted with antirust paint twice after rust removal. After installation and debugging, repair the damaged parts and finally paint them again.
(2) Pipeline installation and painting
Indoor fire hydrant fire extinguishing system and closed automatic sprinkler fire extinguishing system all adopt internal and external hot-dip galvanized steel pipes. Pipes with pipe diameters below DN 100 are connected by threads, and the filler is special thread pipe connecting glue or raw material belt thickened with white paint and fine linen. Pipes with diameters above DN 100 and DN 100 are connected by clamps. Brush silver powder twice after installation.
(3) Valve installation
The valve test-bed should be made on the construction site, and the compressive strength test should be carried out before the valve installation. The number of samples in each batch (same brand, same specification and same model) should be 65438 00% and not less than 65438 0. Unqualified cracks should be checked again by 20%, and those that are still unqualified should be checked one by one. The closed-circuit valves installed on the main pipeline for cutting off shall be tested for strength and tightness one by one. Strength and sealing test pressure shall be the pressure specified by the valve factory. Technicians should fill in the "Valve Pressure Test Record Form" in time. When the butterfly valve is equipped with different types of valve groups, it should be ensured that the opening degree of the butterfly valve is not affected when it is used. If necessary, the valve shall be connected with short flange. The parts of special valves that will not be installed temporarily will be put into storage according to the serial number, and will be installed and perfected one by one in the engineering debugging stage.
(4) Pressure test and flushing of pipelines
The pressure test and flushing of pipelines shall be carried out independently by each system or subsystem. The test pressure and test results of the pipeline should meet the design requirements, and then the overall pressure test should be carried out again. The test point of hydraulic strength test should be located at the lowest point of the system pipe network. When injecting water into the pipe network, the air in the pipe network should be exhausted and the pressure should be increased slowly. After reaching the test pressure, the pressure should be stable for 30 minutes. The appearance inspection of pipe network shall be free of leakage and deformation, the pressure drop shall not be greater than 0.05MPa, and the flushing of pipe network shall comply with the provisions of Code for Construction and Acceptance of Automatic Sprinkler Fire Fighting System. The water pressure leak test shall be carried out after the water pressure strength test and pipe network flushing are qualified. The test pressure shall be the design working pressure and shall be stable for 24 hours without leakage.
Installation of equipment
(1) sprinkler, fire hydrant (box), fire pump and equipment installation
All nozzles, fire hydrants (boxes) and fire pumps shall be installed after passing the pressure test and flushing. Equipment installation should be moved, hoisted and put in place according to the technical requirements of product installation.
(2) Installation of alarm equipment:
Installation of detector: the detector base is fixed on the junction box with screws, and it can be completed by screwing the detector on the base. But before installation, the detector must be adjusted according to the set address code, and the light-emitting lamp on the detector should be aimed at the direction that is beneficial to the observer's observation.
The linkage module should be installed nearby according to the location of linkage equipment, and the linkage module and manual button must be numbered according to the set address code.
Installation of main engine: the fire control room on the main engine floor is equipped with a special grounding wire, and the resistance to ground is less than 1ω. The wiring between the host and the external equipment is connected through the terminal board. It is forbidden to drag the wires directly to the equipment.
(3) Debugging of alarm linkage
When all the equipment of the whole system is installed and the control points connected with the outside world are completed, the system can be debugged, and the whole system can be programmed, the corresponding logical relationship can be set, and debugging records can be made.
6.3 Construction Key Points and Technical Measures
6.3. 1 Record the blue prints.the design of the pipeline, further check the position and size with the civil reserved embedded work, and go through the visa formalities after being confirmed by the supervisor.
6.3.2 After checking the specifications of pipes, fittings, valves and fire pumps, draw the corresponding construction prefabricated drawings and determine the material plan.
Determination of pipeline position. Understand and determine the elevation, position, slope and pipe diameter of the supervisor, and make the supports and hangers correctly according to the requirements of drawings and specifications.
6.3.4 Galvanized steel pipes with pipe diameters below DN 100 for indoor fire hydrant fire extinguishing system, closed automatic sprinkler system and fire monitor fire extinguishing system shall be connected by threaded connection, and the wires shall be sheathed by mechanical threading machine. One-time setting is strictly prohibited to avoid "tooth loss". When the pipeline is connected by thread, appropriate filler should be added between the external thread of the pipeline and the internal thread of the pipe fitting or valve core, and flax and white thick or raw material adhesive tape should be used. When installing, first loosen flax into thin and uniform fibers (or use the original belt), and then start winding along the line from the second thread buckle. After winding, the surface is whitened and thickened along the thread direction (the original belt is not required to be whitened and thickened), and then the pipe fittings are screwed on by hand, and then tightened with a pipe wrench. Packing should be properly wound, white is thick and pure, and hemp yarn or raw material belt should not be squeezed into the lumen to avoid blocking the pipeline.
6.3.5 Galvanized steel pipes with pipe diameters above DN 100 (including DN 100) for indoor fire hydrant system and closed automatic sprinkler system shall be connected by clamps.
6.3.6 According to the conditions of pipeline installation, arrange the installation sequence reasonably, first underground, then on the ground, first large pipe, then small pipe, first main pipe and then branch pipe. When there is a contradiction in pipeline crossing, it shall be avoided according to the following principles:
A. the small tube gives way to the big tube;
B. Pressure pipes give way to gravity pipes;
C. let the branch pipe pass to the supervisor.
Main pipeline installation
When installing the main pipe after the bracket is installed, mark the center line of the main pipe first, and determine the position of each main pipe on the center line. When prefabricating the pipeline, the heads in the same direction should be in a straight line, and when the pipeline is reduced, it should be carried out after the branch pipe is out. The assembled variable diameter pipeline should be calibrated and inspected on the ground to ensure that the pipeline is not skewed or twisted. After the installation of the supervisor, the final calibration survey should be conducted to ensure that the bearing surface and vertical plane of the whole pipeline are in the same straight line and finally fixed firmly. The installation layer of the pipeline is horizontal and vertical, and the allowable deviation of the vertical and horizontal direction of the horizontal pipeline is 5mm when the pipe diameter is less than 100mm, 100mm when the pipe diameter is greater than 100mm, and 25mm when the transverse bending length is greater than 25m.
6.3.8 Supervision of installation
The position of the main pipe clamp must be determined first. When the height of the main pipe clamp is less than or equal to 5m, one is installed on each floor. When the height exceeds 5m, it shall not be less than two floors. The installation height of pipe clamp shall be 1.5m- 1.8m above the ground. Rows of pipes should be evenly installed with two or more pipe clamps or the installation height of the main pipe clamps on the same floor should be consistent. According to the horizontal line of the main branch pipe, measure the actual size of each main pipe for prefabrication and assembly, and install it after inspection and investigation. The installed supervisor shall make a final inspection to ensure the verticality (allowable deviation: 4mm per meter, no more than 30mm above 10 meter) and the distance from the sample, so that the front face and the side face are on the same vertical line. Finally, tighten the pipe clamp or bolt it on the main pipe. The valve on the main pipeline should be installed according to the height shown in the design, and the valve handle should face the operator's right side and form a 45-degree angle with the wall. The detachable connector must be installed on the back of the valve.
6.3.9 Branch pipe installation
Before installing the branch pipe, draw (or pop up) the horizontal line of the installation position of the horizontal branch pipe on the wall according to the nozzle reserved on the main pipe, and allocate the installation position of the branch pipe rack and bracket according to the designed pipe diameter. The installation must be firm and reliable, and the detachable side fittings are evenly arranged at the beginning of the branch pipe with three or more water distribution points and behind the water supply gate valve according to the water flow direction. Prefabricated assembly according to the required size of each branch pipe (the assembly length depends on the convenience of pipe feeding). After inspection and debugging, install the branch pipe. After the branch pipe is installed, finally check all supports and nozzles to remove residual wires and dirt, and then block the nozzle with plugs or caps to prevent dirt from entering, and prepare for water filling and pressure test.
Valve installation
Make a valve test-bed at the construction site, and carry out pressure and strength tests on the valve as required. For closed-circuit valves that cut off the main pipeline, strength and tightness tests should be carried out one by one. When the butterfly valve is equipped with different types of valve groups, it should be ensured that the butterfly valve is not affected during use. If necessary, the valve is connected with a short flange.
6.3. 1 1 Pressure test and flushing of pipeline
This project has large installation area, high installation space and large span, and it is difficult to test the pressure of the pipeline, and it is difficult to maintain the pressure after the system pressure test. The pressure test of each subsystem should be carried out separately, and then the overall pressure test should be carried out. The pressure test and flushing of pipelines shall be carried out independently by each system or subsystem. The test pressure and test results of the pipeline should meet the design requirements, and then the overall pressure test should be carried out again. The test point of hydraulic strength test should be located at the lowest point of the system pipe network. When injecting water into the pipe network, the air in the pipe network should be exhausted and the pressure should be increased slowly. After reaching the test pressure, the pressure should be stable for 30 minutes. The appearance inspection of pipe network shall be free of leakage and deformation, the pressure drop shall not be greater than 0.05MPa, and the flushing of pipe network shall comply with the provisions of Code for Construction and Acceptance of Automatic Sprinkler Fire Fighting System. The water pressure leak test shall be carried out after the water pressure strength test and pipe network flushing are qualified. The test pressure shall be the design working pressure and shall be stable for 24 hours without leakage.
6.3. 12 Install nozzles, fire pumps and fire hydrant equipment, etc.
When installing all nozzles, fire pumps, fire hydrants and equipment, check the models and specifications one by one, and open the box for acceptance. Construction should be carried out according to the design requirements and installation technical requirements of water spray, fire hydrant system and fire alarm system.
6.3. 13 Electrical pipeline laying requirements:
(1) The wiring of the automatic fire alarm system shall comply with the current national standard Code for Construction and Acceptance of Electrical Equipment Engineering. When wiring the automatic fire alarm system, the type and voltage level of the conductor should be checked according to the current national standard Code for Design of Automatic Fire Alarm System. The threading of pipes or trunking shall be carried out after plastering and ground engineering. Before threading, the accumulated water and sundries in the pipe or groove should be removed. Lines with different systems, different voltage levels and different current categories should not be worn in the same pipe or the same slot of trunking, and there should be no joints or kinks. Wire connectors shall be welded in junction boxes or connected with terminals. Nozzle and pipe joint laid in dusty or wet places shall be sealed. When the pipeline exceeds the following length, the junction box shall be installed at a place convenient for wiring.
(1). When the pipe length exceeds 45m and there is no bending;
(2) Every time the pipeline length exceeds 30m, there will be 1 bending hour;
(3) There are two bends when the pipeline length exceeds 20m;
(4) Every time the pipe length exceeds 12m, it will be bent for three times. When the pipe is put into the box, the lock nut should be installed on the outside of the box, and the mouth protector should be installed on the inside. When laying in the ceiling, lock nuts should be installed on the inside and outside of the box. When laying various pipes and trunking in the ceiling, it is advisable to use a separate fixture for hoisting or supporting. The straight line section of trunking shall be provided with lifting points or fulcrums in each cell of 1.0- 1.5m, and the following parts shall also be provided with lifting points or fulcrums:
A. trunking joint;
B. 0.2m away from the junction box
C. the direction of trunking changes or corners appear. The diameter of suspender for hoisting trunking shall be not less than 6mm. When the pipeline passes through deformation joints (including settlement joints, expansion joints and seismic joints, etc.). ) buildings, compensation measures should be taken. The wires crossing the deformation joint should be fixed on both sides, with appropriate allowance. After laying the wires of the automatic fire alarm system, measure the insulation resistance of each loop wire with a 500-volt megohmmeter, and the insulation resistance to the ground should be not less than 20 megohmmeter.
(2) Requirements for wiring pipelines in this project: The general contractor is responsible for reserving embedded pipelines, and the fire protection contractor is responsible for threading. If there is any leakage or buried pipeline impassability, it shall be solved by the general contractor.
(3) Wires leading to detector base box, control equipment box, speaker box, etc. The through junction box and trunking shall be protected by metal hoses.
6.3. 14 Equipment installation requirements:
(1) The installation point and location of the fire detector shall meet the following requirements:
(1). The horizontal distance from the detector to the wall and beam edge should not be less than 0.5m
(2) detector around 0.5m range, there should be no obstacles;
③ The horizontal distance from the detector to the air supply outlet of the air conditioner should not be less than1.5m; The horizontal distance from the orifice of the perforated air supply ceiling shall not be less than 0.5m The horizontal spacing between the detector edge on the ceiling and the edge of the following facilities shall be maintained at:
A. the horizontal clear distance from the lighting lamps should not be less than 0.2m
B. Clear distance between temperature detector and high-temperature light source lamp (such as iodine tungsten lamp, incandescent lamp with capacity greater than 100W, etc.). ) should not be less than 0.5m ..
(4) When the detector is installed on the ceiling of the inner walkway with a width less than 3m, the installation spacing of the temperature detector should be arranged in the center and should not exceed10m; ; The installation spacing of smoke detectors shall not exceed 15m. The distance between the detector and the end wall should not exceed half of the installation spacing of the detector.
⑤. The distance between the infrared detector and the side wall should not be less than 0.6m. The detector should be firmly fixed on the wall and the adjusting bolt to ensure the alignment of the optical axis. The receiving head should be as far away from direct sunlight as possible. When multiple independent detectors are installed side by side, the receiving head and the transmitting head should be staggered.
6. The detector should be installed horizontally. When it is necessary to tilt, the tilt angle should not be greater than 45. The detector base is firm, and the wire connection must be reliably crimped or welded. When welding is used, corrosive flux shall not be used. The "+"line of the detector should be red, the "-"line should be blue, and the rest lines should be distinguished by other colors according to different uses. However, the colors of wires used in the same project should be consistent. The outer conductor of the detector base shall have a margin of not less than 15cm, and the entrance shall be clearly marked. The threading hole of the detector base should be blocked, and protective measures should be taken for the detector base after installation. The confirmation light of the detector should face the direction of the main entrance for personnel to observe. The detector can only be installed when it is about to be highly debugged. It should be properly kept before installation, and dust-proof, moisture-proof and anti-corrosion measures should be taken.
6.3. 15 Install the manual alarm button. The manual fire alarm button shall be installed on the wall at a height of/0/.5m from the ground (building). The manual fire alarm button shall be installed firmly and shall not be tilted. The outer conductor of the manual fire alarm button shall have a margin of not less than 10cm and shall be clearly marked at its end.
6.3. 16 Installation of fire alarm controller
The main power inlet of the controller should be directly connected with the fire power supply, and the power plug is strictly prohibited. The main power supply should be clearly marked. The grounding of the controller shall be firm and clearly marked.
6.3. 17 Installation of fire fighting equipment
Before installation, the fire-fighting equipment shall be functionally tested, and those who fail to pass the test shall not be installed. When the metal hose is used as the casing, the length of the outer conductor of the fire-fighting equipment should not be greater than 2m, and it should be fixed with a pipe clamp, and the distance between its fixing points should not be greater than 0.5m The metal hose and the junction box (box) of the fire-fighting equipment should be fixed with lock nuts and grounded according to the regulations of piping. The ends of external wires of fire fighting equipment shall be separated and clearly marked. Terminals of different voltage levels and different current categories in fire fighting equipment (cabinets) should be separated and clearly marked.
6.3. 18 system grounding requirements
Working grounding should use insulated conductor cable with copper core. When the working grounding wire from the fire control room to the grounding body passes through the wall, it should pass through the steel pipe or other solid protective pipe. Metal hose shall not be used to protect grounding conductor. After the completion of grounding device construction, concealed works shall be accepted in time.
6.3. 19 system leakage test and system joint test
A. After the water pressure strength test and pipe network flushing are qualified, the pressure of 0.9MPa is adopted. After 24-hour leak test and voltage stabilization, the system is qualified if there is no leakage.
B. Simulate the fire situation to carry out linkage debugging of system equipment.