First, the construction preparation
1. Labor preparation: In order to ensure the project quality and construction period, our project department will select the municipal engineering construction professional team with excellent technology, strict management and standardized organization from the long-term registered professional construction team to invest in this project construction. Ensure that all technical workers of the team have received on-the-job training and passed the exam.
2. Material preparation: Before the project starts, according to the material analysis of the construction budget and the requirements of the construction progress, prepare the material use plan, select suppliers who stress quality and credibility, and do a good job in the procurement and supply of various materials. Strengthen the quality inspection and acceptance of incoming materials. Unqualified materials cannot enter the site. After entering the site, it should be stored as required to ensure that the materials are in good condition.
3. Mechanical preparation: prepare the mechanical use plan before the project starts, so that the machinery can enter the site in advance to ensure the project needs.
4. Technical preparation: Prepare the construction organization design in the construction stage. Before construction, organize technicians and constructors to conduct on-site investigation, organize to study the bidding documents and construction technical specifications, and prepare the survey implementation outline. According to the tight construction period of this project, the technical personnel of the project department will prepare the corresponding construction plan in time according to the actual situation on site at any time.
5. Other preparations: According to the field investigation: (1) Investigate the geographical environment and hydrogeology within the construction scope; (2) Temporary roads; (3) Actively coordinate with the senior management of relevant parties to make the project enter the substantive construction stage as soon as possible.
The Project Management Department will assign special personnel to be responsible for: (a) coordinating local contradictions; (b) Strengthen high-level coordination with local governments and relevant departments to create a good external construction environment for the smooth construction of the project.
Investigate surrounding units and residential areas, coordinate the headquarters to mediate local contradictions along the line, and coordinate with local governments, major transportation, electric power, water supply, communications, public security, city appearance, sanitation and other departments.
Second, the site facilities layout
1. Temporary water use: Hold on-site coordination meeting with relevant departments before construction, make full use of surrounding water supply facilities, and partially bury temporary water supply pipelines to meet the temporary water use for construction.
2. Temporary electricity consumption: temporary lines are set up to provide electricity for construction.
3. Office and living area: set up office and living facilities. According to the field investigation, it is necessary to set up the field office and staff dormitory.
Third, the main construction technical measures
3, technical preparation:
Before the construction of each working procedure, the technical scheme should be prepared and disclosed, and submitted to the supervision engineer for confirmation.
(1) Understand the length, width, depth and quantity of river pond dredging, abandon the storage yard and master the definition standard of silt. Before dredging, try to find out the thickness of silt and estimate the amount of silt. For the river ponds (including hidden ponds) not marked in the construction drawing, they should be demonstrated before treatment and reported to the supervision team, which will notify the project engineer and confirm with the design representative on site.
(2) Excavators can be used for dredging, which should be supplemented by manual dredging.
(3) When dredging rivers, ponds and ditches, the soil quality must be clear and humus soil must be thoroughly removed.
(4) Before dredging, the personnel of the project department shall draw the plan, longitudinal section and cross section in detail to determine the elevation before siltation.
Second, the construction technology
1. It is necessary to reasonably organize the pumping work of each river pond to avoid the situation that river water flows backwards to replace the river pond due to the heavy pumping workload in the water area.
2. After pumping, the pond should be dredged according to the construction organization order, and the silt should be placed in the designated place to prevent environmental pollution. When dredging, dredgers are used to remove silt according to the thickness of silt, and dredging and filling are carried out at the same time, and then squeezing construction is carried out. During dredging, two excavators are used to remove silt. When two excavators are working at the same time, a certain safe distance should be kept to prevent the boom from colliding with each other.
3. Before and after dredging, the elevation of each river pond shall be measured by the surveyor of the project department, and the corresponding plan and cross section shall be drawn, which shall be checked by the supervisor. If necessary, the testing center designated by the owner will send someone to retest. Among them, the plan of the river pond should indicate the geometric size and its relative position with the subgrade; Measure the elevation of each measuring point before and after dredging on the cross section of the river pond, draw the cross section of the river pond dredging, and calculate the dredging amount of the river pond by using the calculation table of the dredging amount of the river pond, which will be signed by the supervisor as the basis for quality assurance data and design changes.
4. In principle, dredging shall not exceed the design depth. If there is bad soil after dredging to the design depth, it must be determined by on-site supervision, design representative and owner's representative through on-site observation and test. If it is silt, it should be cleared.
5. Site image data and indoor data before and after dredging should be sorted out and improved in time and reported to the supervision team.
1, establish a quality assurance inspection system, refine the work to people, and ensure one-to-one correspondence between those responsible for each working procedure.
2, clear quality objectives, strict implementation of quality inspection procedures.
Actively respond to the call of the owner, create excellent projects, seriously organize construction personnel and quality inspection personnel to learn the technical specifications provided by the owner, and clarify the requirements of excellent projects. According to the effective quality inspection procedures, monitor the quality of each working procedure in the construction process. The previous procedure is not accepted, and the next procedure is not allowed to be constructed.
3. Improve and strengthen the quality awareness of all construction personnel. Make workers firmly establish the idea of "quality first, users first, reputation first".
4, strengthen personnel organization and mechanical input, equipped with enough management and construction personnel, to facilitate the management and control of engineering quality.
5. The specific guarantee measures are as follows
5. 1 investigation work
(1) All measuring instruments should be calibrated before use. If the construction process exceeds the calibration time, it should be recalibrated. When errors are found in the use of measuring instruments, they should be verified and corrected before use to meet the requirements. Check the measurement data delivered by the design unit before use. If problems are found, report to the supervision engineer in time and make up the measurement together with the design unit.
(2) Regularly review the leveling and traverse control points, and report the review results to the supervision engineer for approval. Before the start of each working procedure, all measuring points should be checked. The encrypted control points can only be used after being approved by the supervision engineer.
5.2 Testing work
(1) All test instruments used in this project are calibrated before use.
(2) Do a good job of testing raw materials according to the specification requirements, ensure the use of qualified materials in engineering construction, and resolutely repel unqualified materials.
(3) Strengthen the test and detection in the construction process, and conduct self-inspection in each construction process according to the frequency required by the specification. After the test is qualified, it shall be reported to the supervision engineer for sampling inspection, and the construction of the next working procedure can be carried out only after it is approved by the supervision engineer.
(4) Do a good job in the test data and classify them for filing, so as to provide a reliable basis for engineering quality control.
1, security target
Safety goal: zero casualties.
2, safety assurance measures
2. 1 Establish a safety leading group.
Under the direct leadership of the project manager and chief engineer, a safety leading group with the project manager as the team leader, the chief engineer and the head of the Department of Security as the deputy team leader and the site builder as the team members was established. Each construction team is equipped with full-time security officers to pay close attention to safety management.
2.2 Establish the responsibility system for production safety
Establish a safety production management network and implement the responsibility system for safety production. Project intends to set up full-time security officer, operation team set up part-time security officer, do a clear division of labor, responsibility to the people.
2.3 Strengthen safety education
Before the start of the project, all the construction personnel who participate in the project shall be educated about safety in production, so as to improve the safety thoughts of all the construction personnel, organize the study of safety technical operation procedures, and formulate detailed safety production measures in combination with this project.
2.4 Strengthen the safety management of the construction site
The full-time security officer of the security department should adhere to the patrol inspection of the construction site. The full-time safety officer of each construction group shall conduct security team inspection. The whole construction site shall be provided with standardized safety signs and signs, which shall be maintained and supplemented at any time.
2.5 Do a good job in traffic safety management
2.6 Designate a special person to conduct traffic control and guidance in the construction section, and set up various safety warning signs in the operation area to meet the requirements of traffic opening as much as possible on the premise of ensuring safe construction.
2.7 Safety measures for machinery and construction transport vehicles
Operators of machinery and construction transport vehicles need formal training and certificates. Adhere to regular inspection and maintenance work to ensure that it is in good condition during operation. Strengthen the safety education and standardized management of drivers, fix transportation routes, put an end to traffic accidents and set up traffic signs. When driving on the expressway, vehicles should obey the traffic rules.
2.8 Temporary electricity consumption
2.8. 1 TN-S system must use on-site electricity, and neutral point grounding should be standardized.
2.8.2 The protective zero line (PEN) and the working zero line (N) shall be laid separately and shall not be used for other purposes, and yellow/green double-color lines shall be adopted. The protective zero line must be repeatedly grounded at the main distribution box, and in the middle and end of the line when the line is long. The cross section of the protective zero line shall not be less than the working zero line, and it shall have the necessary mechanical strength.
2.8.3 The protection zero line shall be led out by the zero line measured by the power supply of the first-level leakage protector.
2.8.4 Under normal circumstances, the metal shell, spare parts, pipes, tracks and parts close to the live parts of electrical equipment that are not live should be protected and connected with metal fences and doors.
2.8.5 In the power supply system of the same system, there shall be no part of electrical equipment with zero protection and the other part with grounding protection.
2.8.6 Use of leakage protector: Two-stage current-operated leakage protectors are installed in the main distribution box of construction and the third-stage distribution box on site.
2.8.7 One machine, one brake, one box and one leakage protection shall be implemented for on-site electricity consumption.
2.8.9 Distribution system lines should be laid with insulated wires or cables, and buried lines should be marked with grounding. Lines without underground buildings and heavy machinery should be laid. When local sections cannot be buried when crossing the road, steel pipes should be worn for protection.
2.8. The10 system shall be regularly overhauled by a maintenance electrician.
2.8. 1 1 Set guards, red signal lighting and emergency lighting as required, and the power supply is led out from the power supply side of the on-site power switch.
Eight, civilized construction and environmental protection
1, the main measures of civilized construction:
1. 1 organizational management measures
(1) Establish and improve the management organization. A civilized construction management organization with the project manager as the team leader and management personnel of production, technology, quality, safety, fire protection, security, materials, administration and health as members shall be established on the construction site.
(2) Improve the management system, including: personal post responsibility system, economic responsibility system, reward and punishment system, meeting system and various professional management systems.
(3) Improve management information.
(4) Conduct competitions.
(5) Strengthen education and training.
(6) Actively popularize and apply new technologies, new processes, new equipment and modern management science to improve the degree of mechanized operation.
2.2 Site management measures
(1) Layout of the construction site, orderly construction of production and living rooms, neat stacking of machines, tools and materials, neat site and no mess.
(2) The materials shall be piled up reasonably, the yard shall be clean and tidy, the materials shall be piled up neatly and stably, and all kinds of materials shall be piled up in categories with obvious signs. The amount of reserves is appropriate, so that the work is completed.
(3) The construction should be standardized, standardized and institutionalized, and barbaric construction and illegal operation should be put an end to.
(4) Civilized construction, so as to dress neatly and mount guard to prevent barbaric operation.
(5) Strengthen the security work on the construction site, and prohibit other people from entering.
(6) Before the project construction, it is necessary to consult the owner and relevant departments in advance about the setting and dismantling of public facilities and civil facilities within the proposed construction scope. Before demolition, all necessary measures should be taken to properly protect them to prevent these facilities from being damaged during construction.
(7) If the construction of temporary works or permanent works may affect the public facilities and civil facilities near the road land, the representatives of these facilities must be informed in advance, and the construction operation can only be carried out in their presence.
(8) Actively contact the local government and the masses, understand local folk customs, respect ethnic and religious beliefs and living habits, properly handle the relationship between the local government and the masses, and avoid conflicts with the masses. Educate employees to strictly abide by laws and regulations and local rules and regulations. Put an end to illegal phenomena such as grand theft auto and fighting.
2. Environmental protection
2. 1 Construction environment maintenance measures
(1) Establish the management system of environmental protection, soil and water conservation and civilized construction in civilized construction, and improve the management system.
(2) The Project Department shall set up a leading group for construction environmental protection, soil and water conservation, appoint a deputy manager to be in charge of construction environmental protection, soil and water conservation and civilized construction, and formulate management rules for construction environmental protection, soil and water conservation and civilized construction in combination with the actual situation on site, which shall be submitted to the owner and supervision engineer for approval before implementation.
(3) Formulate detailed rules for construction environmental protection, soil and water conservation, civilized construction, construction site management, construction order management and construction safety management, and earnestly implement them, and link the construction environmental protection, soil and water conservation and civilized construction with the funds of each operation team and management personnel respectively. The project manager department shall inspect the environmental protection, soil and water conservation and civilized construction once every ten days, and make timely rectification when problems are found.
(4) During the construction period, protect the environment, protect the greening, and protect the existing buildings and pavements from damage and pollution. After the completion, thoroughly clean up the site, restore the original roads and facilities, and clean up the site and surrounding environment, so as to achieve smooth delivery.
2.2 Pollution prevention measures
(1) The spoil piles and construction spoil should be stacked in the places designated by the owner, supervisor and engineer, and dumping into reservoirs, rivers and farmland is prohibited to prevent pollution.
(2) Complete subgrade drainage system as soon as possible, slope protection as soon as possible, and reduce soil erosion.
(3) The spoil of bridge and culvert foundation pit shall be transported away in time, and the original appearance of the river shall be restored as soon as possible.
(4) When the earthwork of temporary works is transported by official road, the fender of the car should be raised, and there will be no muck and dust on the road and around the residential area. The abandoned soil in the planning area should also be leveled, and protective facilities should be added.
(5) All kinds of construction and domestic sewage, dirty oil and chemical waste shall not be discharged at will, and must be discharged after treatment.
(6) Set up garbage storage and transportation stations in each residence and construction site. After centralized collection of domestic garbage, it should be handled in consultation with the local environmental protection department.
(7) All temporary facilities built for construction needs must be dismantled in time after the handover certificate is issued, equipment and surplus materials should be produced at the historic moment, and the site and construction site should be kept clean and tidy to the satisfaction of the supervision engineer.
2.3 Noise control measures
(1) Reasonably allocate power machinery workplaces, and try to avoid running machinery and equipment with excessive capacity in the same place.
(2) For mechanical equipment with excessive noise such as air compressors and generators, mufflers are installed to reduce noise. Try to avoid night work during construction, which will affect the rest of local people.
2.4 Measures to reduce dust
The job site and transport vehicles should be cleaned in time to ensure the cleanliness of the site and vehicles. It is forbidden to burn all kinds of rubbish and waste on the construction site.
2.5 Soil and water conservation measures
(1) According to the design requirements, the permanent land should be protected by greening and masonry in time to prevent erosion and soil erosion. All borrow sites and spoil sites should be well drained and afforested, and retaining walls should be built to prevent soil from rushing into farmland and rivers.
(2) Other exposed surfaces within the scope of permanent land shall be covered with vegetation for greening.
(3) It is forbidden to dump construction waste into the river bed and occupy other irrigation and drainage facilities in the river to prevent floods, mudslides and other disasters.
Construction Scheme of River Dredging (II)
First, the construction preparation
1, main machines and tools:
1, excavator 320 105 KW, 15 enter the site as required.
2. Platform 6 of bulldozer D 14075 KW comes into the site as required.
3. Cummins 40 platform of dump truck will enter the site as required.
4. The loader LM-30 Xugong 3T platform 4 enters the site according to the site needs.
2. Service road:
After entering the site, investigate the river ponds and number them in turn, namely 1#, 2#, 3 #-22 #, etc. , and fill the temporary service road between the river ponds to ensure the transportation of replacement materials.
3, technical preparation:
Before the construction of each working procedure, the technical scheme should be prepared and disclosed, and submitted to the supervision engineer for confirmation.
(1) Understand the length, width, depth and quantity of river pond dredging, abandon the storage yard and master the definition standard of silt. Before dredging, try to find out the thickness of silt and estimate the amount of silt. For the river ponds (including hidden ponds) not marked in the construction drawing, they should be demonstrated before treatment and reported to the supervision team, which will notify the project engineer and confirm with the design representative on site.
(2) Excavators can be used for dredging, which should be supplemented by manual dredging.
(3) When dredging rivers, ponds and ditches, the soil quality must be clear and humus soil must be thoroughly removed.
(4) Before dredging, the personnel of the project department shall draw the plan, longitudinal section and cross section in detail to determine the elevation before siltation.
Second, the construction technology
1. It is necessary to reasonably organize the pumping work of each river pond to avoid the situation that river water flows backwards to replace the river pond due to the heavy pumping workload in the water area.
2. The thickness of silt surveyed on site in this project is generally about 0.8m-3m, and the thickness of silt in some old river ponds is about 18 m. After pumping, the river ponds are dredged according to the instructions of the construction organization, and the silt is transported to the designated site to prevent environmental pollution. When dredging, use an excavator to remove the silt according to the thickness of the silt, and fill and squeeze it into the construction. During dredging, two excavators are used to remove silt. When two excavators are working at the same time, a certain safe distance should be kept to prevent the boom from colliding with each other.
3. Before and after dredging, the elevation of each river pond shall be measured by the surveyor of the project department, and the corresponding plan and cross section shall be drawn, which shall be checked by the supervisor. If necessary, the testing center designated by the owner will send someone to retest. Among them, the plan of the river pond should indicate the geometric size and its relative position with the subgrade; Measure the elevation of each measuring point before and after dredging on the cross section of the river pond, draw the cross section of the river pond dredging, and calculate the dredging amount of the river pond by using the calculation table of the dredging amount of the river pond, which will be signed by the supervisor as the basis for quality assurance data and design changes.
4. In principle, dredging shall not exceed the design depth. If there is bad soil after dredging to the design depth, it must be determined by on-site supervision, design representative and owner's representative through on-site observation and test. If it is silt, it should be cleared.
5. Sludge stacking problem:
A. Mud with high fluidity shall be transported out of the construction area in time after being dug out and piled up outside the construction area. After drying, it will be transported to the spoil ground.
B, silt with small plastic flow is directly transported to the spoil ground by dump trucks.
C, concentrated silt and other can't use earthwork should be disposed of, and signed by the site supervision.
D, silt with large convection plasticity, in the process of digging and hauling, pay attention to avoid polluting the driving route as much as possible.
6, dredging must be thorough, after dredging to dry the bottom. When the natural transverse slope or longitudinal slope of the ground is steeper than 1: 5, it is necessary to excavate steps on the original ground slope and joints before filling. The width of the step shall not be less than 2m, the overall slope of the outer edge shall not be greater than 1: 3, and the top of the step shall generally have an inward slope of 2%~4%. The step elevation requires 10cm mechanical excavation and manual trimming. It should be noted that the steps must be straight to ensure that the corners roll in place. The slope of the steps is inclined to the old embankment, and the slope ratio is controlled at 3% to facilitate the compaction of the joints. The steps are excavated from bottom to top with the filling progress, and the exposure time of the steps is generally no more than 3 ~ 4 days to complete the last filling.
7. Site image data and indoor data before and after dredging should be sorted out and improved in time and reported to the supervision team.