Key points of bridge engineering safety supervision?

The key point of bridge engineering safety supervision is very important. The key points are formulated to better restrain behavior, and every detail is handled for safety. Zhong Da Consulting will explain the key points of bridge engineering safety supervision for you.

In the process of bridge and culvert construction, there are many factors that affect and restrict safety production, so safety production should be controlled emphatically. At present, various new technologies, new processes, new equipment, new materials and advanced machinery and equipment, such as large-scale foundation construction machinery and equipment and large ships, have been adopted in the construction, which are used for towers, high piers and long-span bridges in deep water. Therefore, it is particularly important to carry out corresponding safety education and training for employees. (1) General safety requirements for bridge and culvert construction Before bridge and culvert construction, design drawings and documents should be checked in detail. In the construction of large-scale bridges with high piers, long spans, deep waters and complex structures, special investigations should be conducted on construction safety technical measures, and reliable advanced technologies, equipment and protective measures should be adopted. In the construction of medium and small bridges and culverts, targeted safety technical measures should be formulated. Before each single project starts, the detailed rules for safe operation shall be formulated in accordance with the regulations, and the disclosure shall be made to the construction personnel. Ancillary structures, temporary works and large facilities of bridge and culvert construction shall take safety protection measures in accordance with relevant regulations. After the completion of various safety facilities, they can only be used after passing the inspection. When new technologies, new processes, new materials and new equipment are adopted for special bridges and culverts, corresponding targeted safety technical measures must be formulated, which can only be implemented after being proved feasible by tests and inspections. In the construction of bridge and culvert engineering, double-layer operation and multi-layer operation should be avoided as far as possible. When it is unavoidable, double-deck operations must be carried out at the same time, or when navigation under the bridge, traffic openings and pedestrian walkways are constructed in a three-dimensional way, protective sheds, anti-collision devices, eye-catching warning signs and signals should be set up to effectively take safety protection measures. For bridges with welding operations, the protective shed should have insulation and fire prevention performance. Hand-held electric tools should be equipped with leakage protectors as required. In case of severe weather such as gale of magnitude 6 or above (including magnitude 6), open-air operation at high altitude, cable hoisting and hoisting of large components should be stopped. It is forbidden for construction personnel to drive construction vehicles and operate construction equipment with high risk level after drinking. Tall self-propelled construction machinery should put down the drilling rig and mast during the moving transition, and relevant technical measures should be taken during the construction under high-voltage lines to keep the minimum safe distance. Coastal bridges should be prepared for typhoon season, and the construction period of the upper structure closure section of long-span bridges should be arranged to avoid typhoon season, and all construction operations should be stopped when typhoon comes. Any project construction should try to avoid night construction. For projects that need continuous construction at night, the construction site should have sufficient lighting and ensure that the construction personnel have enough sleep time. (II) Key points of safety supervision and control for foundation engineering construction (1) and open-cut foundation (1) The supervision engineer shall urge the construction unit to follow the method and sequence of foundation pit excavation and supporting structure installation, and strictly implement the provisions in the construction organization design. (2) The supervision engineer shall also supervise and inspect the foundation pit excavated by earth-moving machinery, and there shall be no workers in the pit. When it is necessary to leave people in the pit to operate, the earth-moving machinery should suspend its operation; Personnel who excavate the foundation pit shall not rest under the pit wall. 2. The construction unit of island cofferdam (1) shall check the stability and firmness of retaining facilities such as baffles and sheet piles from time to time; When the foundation pit is deep, people should be hoisted up and down with escalators at appropriate positions. In the process of construction, if abnormal conditions such as quicksand, sand gushing or support deformation are found, the excavation should be stopped immediately and the workers should be evacuated immediately. After taking effective safety reinforcement measures, the excavation can continue. (2) When dredgers are used to blow sand to build islands, the construction unit shall strictly check and test the hull draft, berthing position, pipeline range and connection mode. 3. Before the construction of steel sheet pile and reinforced concrete sheet pile cofferdam (1), the construction unit shall conduct a comprehensive inspection of pile driver, hoist and its supporting equipment and ropes. , the construction can be carried out only after passing the inspection and appraisal. (2) The safety officer of the construction unit should carefully check that the mooring personnel should have a stable place, wear a safety helmet and a safety belt, and regularly check the machinery during construction. If you find anything unusual, stop immediately. 4, box cofferdam (1) tugboat towing floating steel box, supervision engineer should supervise all departments equipped with communication equipment, and establish a unified command organization. (2) The supervision engineer shall supervise the construction department to dismantle the steel box according to the procedures specified in the construction organization design. 5, open caisson foundation supervision engineer should observe the surrounding area, if there are obstacles, buildings should take necessary safety measures, and should supervise the construction department to install safety fence at the top of open caisson. Construction facilities, such as pump base, hydraulic machinery pipeline, etc. Standing in wells and wells. Tools at the wellhead shall be provided with protective baffles, and small tools shall be boxed and stored. No one is allowed to stay or rest at the attachment of the external diaphragm wall on the edge of the open caisson to prevent falling objects from injuring people. The supervision engineer shall supervise the construction unit to construct according to the designed width and slope, and meet the safety requirements. 6. After the drilling rig for bored pile foundation (1) is in place, the construction unit shall conduct a comprehensive inspection of the drilling rig and its supporting equipment. Rig platforms and working platforms, especially offshore rig platforms, should be firmly set, covered with scaffolding, and provided with protective fences and walkways. Debris and obstacles should be removed in time. (2) The supervision engineer should pay attention to the operation of all kinds of drilling rigs, which shall be operated by the operators designated by the mechanic head or mechanic management personnel, and other personnel shall not board the plane. 7. After all kinds of pile sinking and pile frame assembly are completed, the construction unit shall inspect and accept all machines, tools, equipment and safety protection facilities, such as working platforms, guardrails and springboard, before construction. When it snows or freezes, it should be cleaned immediately. 8, dig a hole, immersed cast-in-place pile foundation supervision engineer should urge the construction unit must be carried out in accordance with the provisions of the safety management regulations, to ensure the safety of digging personnel, often keep the hole ventilated. 9, pile pulling operation using diesel or steam pile driver's pile barrel, should be vertical hanging pull, are not allowed to stay. When it is difficult to lift and pull out the pile barrel when it is buried deeply, auxiliary measures should be taken, and hard pulling is strictly prohibited; When lifting the pile, it should be lifted slowly, and the lower part of the pile should be tied with a sliding rope to control it stably. 10. Before the vibration sinking operation of pipe pile foundation, the construction unit shall arrange security personnel to check the safety and stability of adjacent buildings, temporary facilities and adjacent pipe piles, and take safety protection measures when necessary. (3) Key points of safety supervision and control of pier and abutment construction 1. When pouring concrete on the pier with bucket, the supervision engineer reminds the construction department to designate a special person to command, and the lower operators must avoid it. The upper personnel shall not lean against the railing to push the bucket, and it is forbidden for the bucket to collide with the formwork and scaffolding. 2.( 1) Before the pier is laid, the supervision engineer shall check the safety protection facilities such as scaffolding, working platform, guardrail and escalator that have been erected by the construction unit. (2) The supervision engineer shall supervise the construction unit to construct according to the designed width and slope, and meet the safety requirements. 3. Slipform construction (1) When slipform construction is adopted for pier (platform), tower pier, cable tower and other high-rise structures, the supervision engineer shall supervise the construction unit to install safety protection facilities at the site in accordance with the Safety Regulations for Working at Heights, and the personnel shall wear personal protective equipment. According to the characteristics of the project, the single construction scheme and safety technical measures are compiled, and the safety technical disclosure is made to the personnel involved in slipform construction. (2) When the slipform equipment is dismantled, the supervision engineer shall supervise the construction unit to take safety protection measures. When dismantling, depending on the capacity of lifting equipment, it can be dismantled in groups or hoisted to the ground for disintegration, so as to reduce the workload at high places and the deformation of railings. The demolition site should be designated as a warning zone. The safe distance from the warning line to the edge of the building shall not be less than 10m. (4) Control points for safety supervision of superstructure engineering 1. The safety operation supervision engineer of precast members shall check whether the layout of precast site is reasonable and whether the pile of precast beams is standardized and stable. Construction of prefabricated installation components shall not be carried out at night, and fatigue operation of workers is prohibited. For the installation of prefabricated components (beams and slabs), the supervision engineer shall supervise and inspect whether the construction unit has formulated the installation plan and established a unified command system. For difficult and dangerous operation projects, construction technology, command and operation personnel should be trained. It is also necessary to check whether all lifting equipment meets the national special equipment safety regulations and carry out strict management. The supervision engineer shall supervise that the installed components must be kept horizontally and stably lowered, accurately positioned and closely attached to the support. When lifting a large structure with prominent edges, a pad should be set at the corner where the steel wire rope contacts the component. When installing single guide beam and pier top gantry, the supervision engineer shall supervise the construction unit to implement it according to the correct regulations. When the precast yard uses jack-up components to load cars and double guide beam components, the supervision engineer should check whether the construction unit operates according to the regulations. When installing the bridge erecting machine and the cross-pier gantry parts, the supervision engineer shall supervise the construction unit to carry out the installation and construction in accordance with the safety requirements stipulated by the state. When simply supported beams, slabs and other components are hoisted by cranes, the relevant safety regulations for hoisting shall be observed. When installing large basin rubber bearings, operating platforms should be set on both sides of the pier top. After the bearings are hoisted to the pier top and stabilized, the operators at the pier top should be righted in place. The supervision engineer shall supervise the construction unit to cut off the power supply before the gantry, bridge erecting machine and other equipment are dismantled. When dismantling the gantry, the bottom of the gantry should be padded, and the top of the gantry should be installed with cable wind rope and temporary connecting beam. Folded strips, bolts, materials, etc. Will be tied and hung. When installing culvert precast cover plate, check whether the construction unit uses crowbar and other tools to move it in place. The single rib cover plate shall be marked with lifting signs. Hoisting culvert pipe should be tied firmly. Various large-scale hoisting operations, after a period of continuous tension (such as a hole beam, plate or large-scale process, etc.). ), suitable for people to rest, avoid being in a state of high tension for a long time, and regularly check, maintain and repair lifting equipment. 2. When the cast-in-place superstructure is cast-in-place reinforced concrete or prestressed concrete, the supervision engineer should first check whether the construction unit has set up safety protection facilities such as scaffolding, working platform, guardrail and safety net. Before construction, the supervision engineer should check the machines and tools, their assembly status and protective facilities, and the main machines and tools should be put into trial operation. When pouring concrete on the support, preloading test should be carried out to check the bearing capacity and stability of the support and eliminate inelastic deformation. During the construction process, the supervision engineer shall urge the construction unit to check the support and formwork at any time, and take measures in time if any abnormal situation is found. Cast-in-situ superstructure on water, the construction unit shall carry out the construction work in accordance with the provisions on the safety of water operation.

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