I. Safety management
1, the signatures of the relevant personnel of the special construction scheme should be true and effective, with clear opinions and approved by the supervision unit, and the special construction scheme can be effectively implemented in practice.
2, enterprise safety inspection in place, the questions can be according to the "building construction safety inspection standard" (JGJ59-99) or "municipal engineering construction safety inspection scoring method" list the existing safety hazards, and the project department rectification reply and enterprise review records.
3, personnel through safety education mount guard, especially the team should disclosure safety precautions before daily mount guard, special workers should hold relevant certificates.
Second, the civilized construction
1. The construction site shall be closed, and the height of the hard enclosure shall not be lower than1.8m. "Five signs and two drawings" (project overview board, management personnel list and supervision telephone board, safety production system board, fire protection system board, civilized construction system board, site general plan and safety sign layout plan) shall be set up in obvious places at the main entrances and exits, and the entrances and exits shall be marked with enterprise names or logos. Non-urban construction of municipal roads, pipelines and other engineering construction areas, entrances and exits should be set in obvious places (the door should be marked with the name or logo of the enterprise), where there are pedestrians and vehicles, channels should be set aside and hard enclosures should be set up, and warning lines such as colored flags and ribbons can be set up in other areas.
2. The entrance to the gate of the construction site, the main roads in the working area, the main roads in the living area, the surrounding buildings and the stacking place of mechanical materials should be hard ground, and a 20×20cm drainage ditch should be set. Earthwork shall be piled up or transported abroad.
3. The construction area should be clearly divided from the office and living quarters, and corresponding isolation measures should be taken. It is strictly forbidden to use gas stoves, electric cookers and other electrical appliances in the dormitory, and it is strictly forbidden to live in kitchens, work areas, simple rooms and other places. The staff canteen should be kept clean.
4, the construction site in the main construction sites, work areas, dangerous areas and the main import and export set safety warning signs. In addition to protective facilities and safety signs, red lights should be set at night to warn the holes and pits near the construction site.
5, the construction site to establish a fire management system, buildings and other places should be equipped with fixed fire facilities or mobile fire-fighting vehicles, high-rise buildings should be equipped with fire-fighting pressurized pumps and fire hoses with specified diameters.
Third, scaffolding
1, I-beam, channel steel, steel plate, anchor rod, wire rope, etc. Raw materials used for cantilever frame should have factory certificate documents and performance test reports. The layout of section steel and embedded parts of cantilever frame must have a plan. After the embedded parts are embedded, there should be an acceptance record signed by the safety officer, the technical director of the project and the professional supervision engineer.
2, the ground scaffolding foundation hardening treatment, set around the drain. The vertical pole should be placed vertically and firmly on the metal base, concrete floor, concrete precast block, cushion block or steel cantilever beam, with vertical and horizontal sweeping poles. The design of cantilever beam at the corner of cantilever frame should be explained in the scheme.
3. The construction load of the operation layer shall meet the design requirements and shall not be overloaded. Template support, cable wind rope, pumping concrete and mortar pipe shall not be fixed on the scaffold; It is forbidden to hang lifting equipment. Scaffolding shall not be mixed with unloading platform and derrick.
4, scaffolding should have rigid wall parts. Flexible wall-connected parts can't only have tie bars without top bracing. The number of wall connecting pieces should meet the requirements, and appropriate remedial measures should be taken after being removed in the painting stage. Scissors should be set continuously from bottom to top. Scissors should be effectively fixed with the protruding ends of cross bars or vertical rods. Transverse supports should be set at both ends of I-shaped and open scaffolding.
5, scaffolding outside the frame every three steps and the bottom, homework layer, cantilever layer cantilever closed measures. When the clear distance between the vertical pole and the wall in the scaffold frame is more than 20cm, it is necessary to lay vertical poles or set internal railings, and both ends of the arc main scaffold should be protected.
Four treasures, four mouths
1, scaffolding should be one step higher than the operational layer, or take reliable protective measures, and the safety protection of high operating points should be synchronized with the main construction.
2. Stairs, elevator wellheads, reserved holes, balconies without railings or guardrails, around balconies, awnings and overhangs, around roofs and floors without scaffolding, around water tanks and water towers, around municipal engineering inspection wellheads and pool wellheads (during construction) and other places must be provided with protective railings, protective plates or protective nets; After the completion of the project, check and sink the wellhead, and install the supporting manhole cover in time.
3. A protective railing must be set at the fifth limb. The protective railing consists of an upper cross bar and a lower cross bar. The height of the upper pole from the ground is 1.0- 1.2m, the height of the lower pole from the ground is 0.5-0.6m, and the roof with a slope greater than 1: 2.2 should be/kloc-0. When the length of the crossbar exceeds 2m, a railing column must be added; Water supply and drainage ditches, bridge works, mud pools and other dangerous parts should be effectively protected.
4, all kinds of vertical transportation unloading platform limb protection must be in place, limb set 1.2m high double protective railing and safety net fully enclosed, or adopt 1.2m high color steel plate fully enclosed, platform mouth should also be set with safety door or movable protective railing with kicking protection. The bottom plate of the discharging platform is required to be laid with hard plates such as wooden boards and steel plates of more than 4cm, and equipped with anti-slip strips. It is forbidden to use only bamboo feet. The supporting point and pull-up point of the cantilever steel platform must be located on the building, not on the construction equipment such as scaffolding. The diagonal tie rod or steel wire rope should be provided with two sections at each side of the structure, and each of the two sections should be used for single-track force calculation.
5, enter the construction site must wear safety helmet correctly. Protective sheds must be set up at the entrance and exit of the floor, around the hoist, in places where there are dangers caused by high-altitude objects such as steel bar processing, mixing operation and hoist cab. The height of the roof should not be less than 2.5m, and two floors should be set on the roof (the main reinforcement direction of the scaffold should be vertical and the spacing should be greater than 30cm). Aerial work personnel must fasten their seat belts.
6. Scaffolding operations should be covered with feet and hands. Foot piece and hand piece should be firmly bound, and the binding point should be no less than 4 points. The outside of scaffolding must be closed with qualified dense mesh safety net. The main bamboo rib of the bamboo foot mobile phone is placed vertically with the longitudinal horizontal bar.
7, municipal structures, open caisson template, steel production, concrete pouring and other operations with a height of more than 2 meters, platforms, guardrails and walking pedals with a width of more than 60cm should be set.
Five, template support frame
1. Before formwork support construction, a special construction scheme must be prepared, which can be implemented only after it is approved by the technical director of the enterprise and signed and sealed. The construction scheme includes formwork support calculation, size arrangement, disassembly procedure and targeted safety measures.
2. When the height exceeds 8m, the span exceeds 18m, the total construction load is greater than 10KN/m2 or the concentrated line load is greater than 15KN/m, experts must be organized to demonstrate the special scheme of the tall formwork support system.
3, it is forbidden to use wood support. Formwork supports shall be made of steel pipes and fasteners that have passed the inspection, and steel supporting materials with serious corrosion, deformation, fracture, desoldering and loose screws shall not be used.
4, template support in strict accordance with the requirements of the construction scheme, erection, vertical pole foundation, vertical and horizontal pole, two-way horizontal pole, bracing, etc. Check to ensure that it meets the requirements of the construction plan. Brick mats shall not be used under formwork support columns. The columns of formwork support shall be connected, and it is forbidden to extend through the crossbar. The lap length of the vertical pole must reach 1m, and three or more lap fasteners shall be used. It is forbidden to mix templates and scaffolding. Reinforcing bars should be installed on both sides of the beam instead of in the center of the beam bottom.
5. Before dismantling the formwork, targeted safety technical disclosure must be carried out, and both parties shall perform the signing formalities. After the template is set up, it should be accepted. The acceptance form should be filled in carefully and the content should be quantified. After the acceptance, the next working procedure can be entered, and the acceptance record is filed. Dismantling the template shall go through the formalities of examination and approval for dismantling the template.
6, template operation reserved holes and limb should have safety protection. Formwork shall be carried out according to the specified operation procedures, and the next procedure shall not be carried out before the template is fixed. It is forbidden to climb up and down on the connectors and brackets, and it is forbidden to disassemble the formwork on the same vertical plane. Formwork with complex structure shall be assembled and disassembled in strict accordance with the measures of construction organization design.
Six, foundation pit
1 Before foundation pit operation, a special construction scheme shall be prepared as required. The construction plan must be approved by the technical director of the enterprise and signed and sealed before implementation. The excavation depth is more than 5m (including 5m) or more than three floors (including 5m) and the depth is not more than 5m (including 5m). However, the special design of foundation pit construction with extremely complicated geological conditions, surrounding environment and underground pipelines must be reviewed by the design and construction drawing review unit with corresponding qualifications and implemented after organizing experts to demonstrate.
2. The distance between soil materials, mechanical equipment and construction machinery and equipment piled around the foundation pit and the pile load at the pit edge should meet the requirements of design and construction scheme, and overloading is strictly prohibited.
3. During earthwork excavation of foundation pit, a detailed monitoring plan should be made according to the design requirements, including monitoring items, alarm values, monitoring points, monitoring periods, records and information feedback. , and should be implemented in strict accordance with the plan.
4. The earthwork excavation of foundation pit must be carried out in strict accordance with the construction plan, and the excavation sequence and method must conform to the design working conditions, and follow the principle of "slotting support, first supporting and then digging, layered excavation, and over-excavation is strictly prohibited".
5. Drainage ditches should be set on the ground around the foundation pit boundary to avoid water leakage to into the pit; When dewatering outside the pit is used, measures must be taken to prevent the dangerous settlement of adjacent buildings.
6, foundation pit construction must have a dedicated channel for workers up and down, set the channel must be solid and reliable structure, quantity and location meet the construction requirements and comply with the relevant safety regulations.
7, foundation pit construction must use 1.2m high railing hanging safety net for closed limb protection. The distance between the guardrail and the edge of the foundation pit shall not be less than 50 cm.
8. The tensile bearing capacity of anchor bolts shall be inspected according to regulations (the number of inspections under the same conditions shall not be less than 1% of the total number, and shall not be less than 3).
9, soil nailing wall slope, soil nailing spacing, grouting quantity must comply with the design requirements, the upper soil nailing grouting and shotcrete surface reaches 70% of the design strength, before excavation of the lower earthwork and soil nailing construction.
10, the enclosure around the open caisson of municipal pipe jacking construction must be provided with rigid isolation fixed on three sides and movable isolation that can be opened and closed on one side, and warning signs and warning lights should be set.
1 1. Before open caisson and pipe trench construction, toxic and harmful gases must be detected and measures such as ventilation and oxygen supply must be taken.
12. When the open caisson sinks into muddy clay or silt, preventive measures should be taken to prevent the open caisson from sinking suddenly or gushing soil; During pipe jacking operation, safety protection measures should be taken when the groundwater level is high or there is quicksand. If any abnormality is found, the operation should be stopped immediately to eliminate the danger.
Seven, construction electricity
1, a three-level distribution secondary leakage protection system must be implemented. The distance between the distribution box and the switch box should not exceed 30m, and the horizontal distance between the switch box and the fixed electrical equipment it controls should not exceed 3m. Control box and switch box should be set separately. When power and lighting are combined into the same distribution box, the power distribution should be separated, and the power switch box and lighting switch box must be separated. Each electrical equipment must have a dedicated switch box and a safe height from the ground. It is forbidden to use the same switch box to directly control electrical equipment (including sockets) above 1.
2. TN-S neutral protection system must be implemented. The cable must contain all working cores and cores protecting the zero line and the protection line. Cables that need three-phase four-wire distribution must use five-core cables. Electrical equipment, metal shell of lamps and lanterns, and lamp holder must be electrically connected with protective zero line.
3. Cables should be laid overhead or buried. It is strictly prohibited to erect along the entrances and exits of buildings, reinforced floors and easily damaged and corroded floors, and drag or bind around scaffolding and other facilities. Bare metal wires are strictly prohibited as binding wires. It is forbidden to use flower thread and sheath line. The incoming and outgoing lines of the electric box are strictly prohibited at the bottom of the box.
4. When the provisions of Articles 4. 1.2, 4. 1.4 (safe distance from overhead lines) cannot be met, insulation isolation protection measures must be taken and eye-catching warning signs should be hung.
5. The heights of indoor and outdoor 220V lamps on the construction site from the ground shall be not less than 2.5m and 3m respectively. Lighting in damp places or lamps with a height less than 2.5m from the ground shall have a power supply voltage not greater than 36v；; Wet places should not be greater than 24V；; Conductive ground wire, water and metal containers should not be greater than 12v. ]
6. Damaged, unqualified and mismatched electrical appliances shall not be used in the distribution box to prevent the charged body from being exposed. It is forbidden to use reverse switch. The mobile electric box used in pile foundation and municipal engineering must be set on the fixed bracket and not directly placed on the ground.
7. If the cranes, tic-tac-toe frames and scaffolding on the construction site are outside the lightning protection range of adjacent buildings and structures, lightning protection devices should be installed at the top, four corners and the end of the derrick, and the height of the lightning rod is 1-2m.
Eight, construction machinery and mechanical equipment
1. Construction machinery and tools must have production licenses, product quality certificates, installation and maintenance instructions, supervision and inspection certificates and other documents. When entering the site, the defects should be repaired and the acceptance procedures should be fulfilled.
2, material hoist shall not use bilateral discharge, can only feed a building at a time. Any part of the tower crane must keep a safe distance from the overhead transmission line, and effective protection measures must be taken when it is less than the safe distance. During multi-tower operation, measures must be taken to ensure that the distance between any close parts (including lifting heavy objects) between the two machines is not less than 2m.
3, mechanical transmission device, cutting part should have a protective cover. Multifunctional woodworking machinery is strictly prohibited. Hook insurance for mixer hopper and tower crane. Vertical transport machinery should have emergency stop and power failure measures for drivers. Derrick elevator has interlocking self-falling door and anti-falling device; Hanging cage doors shall be equipped with electric or mechanical interlocking flat parking devices.
4. The foundation of vertical transportation machinery must be constructed in accordance with the requirements of product specifications, engineering quality and technical specifications and special construction schemes. The supervision unit shall witness the sampling and make test blocks, and the foundation can be installed only after passing the acceptance. There must be written records for foundation construction and acceptance, and the installation unit and the general contractor (user) are responsible for signing them respectively.
5. The installation and disassembly of vertical transportation machinery must be carried out by the installation and disassembly unit (climbing is the user unit), approved by the technical director of this unit, and reported to the construction general contracting (using) unit and supervision unit for approval before implementation; Construction general contracting (use) units and installation and disassembly units must sign contracts and safety production responsibility letters; Installation and disassembly units must perform safety technical disclosure and signature procedures for operators. Installation, disassembly and maintenance units (including manufacturers) must be carried out by a professional team that has obtained the professional contracting qualification of lifting equipment installation engineering, and should be supervised by technicians and safety officers.
6. The acceptance of vertical transportation machinery must be supervised and tested by inspection and testing institutions with corresponding qualifications, and passed the acceptance of construction general contracting (using) units and installation and disassembly units (including manufacturers), and filed with the construction administrative department or construction safety supervision and management institution where the project is located. Without filing, it shall not be put into use. When in use, the acceptance certificate, the maximum lifting weight card, the driver's post card, the safety warning sign and the operation instruction card should be hung. People and goods elevators must meet the relevant standards, and the instructions clearly stipulate the passenger conditions before they can carry passengers, and the number of people is limited.
7. The attachment device and building structure of the vertical transport machinery frame (exceeding the use conditions of the manufacturer's manual, the construction scheme for production, installation and construction must be prepared) must meet the requirements of the manual or construction scheme. The attachment device of the frame shall not be connected with the scaffold, and the end shall be welded and fixed by pin shaft. When the free height of tower crane exceeds the specification, a wall-attached device must be installed. The lifting frame body is disassembled and assembled by the cable wind rope and put into use by the rigid connecting rod. When the height of cable wind rope is less than 20m, there are 1 group (4), and there are 2 groups in 20-30m. At least two steel pipes (φ 48-53) shall be used for the ground anchor, which shall be arranged side by side (perpendicular to the stress direction of the wire rope), with a spacing of not less than 0.5m and a driving depth of not less than 1.7m, and the pile top shall be provided with anti-skid measures.
8, vertical transportation machinery operators should be trained and show certificates. In case of strong wind, gust, rain, snow and fog, lifting and transportation operations are not allowed. Stop using or when the driver leaves the plane, cut off the power supply and lock it, and lower the ladder cage to the ground. It is forbidden to lift heavy objects and hang the ladder cage in the air for a long time. No one is allowed to stay, work or pass under hanging cages, suspenders and heavy objects. Lifting heavy objects shall be smooth and firm, and scattered objects shall not be stacked or hung on the heavy objects. Parts that are easy to be scattered should be fixed by hanging cage fence before hoisting. Objects marked with binding position shall be hoisted according to the marking after binding. The driver's position should have a good line of sight, and the window should be covered with film, not curtain cloth. There should be obvious horizontal marks on the outside of the frame body or door of the unloading platform. The passenger and cargo elevator has a floor call display contact signal. Tower crane command should use semaphore or walkie-talkie.
9, municipal pipe jacking construction, pipeline and crane unearthed.
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