Talking about the construction safety of continuous beam?

The safety of continuous beam construction mainly involves high altitude, crossing highways, railways, etc., and there are many potential safety hazards and serious accidents, which are highly valued by leaders at all levels. Here I mainly talk about three points:

1. Precautions for the safety of hanging basket operation:

1. The U-bolt connecting the slideway is firmly installed, and the nut is tightened with gasket. Anchored anchor rods require full anchorage for each anchorage hole, and the anchor rod produces not less than three anchor wires, and the front fulcrum of the hanging basket is not less than three I-beam cushion beams, and the spacing between other positions is about 5cm. The joint of the two slideways should be properly encrypted, and the anchorage should ensure that the slideways are horizontal and stable, and the stress of each anchor rod is uniform. The deviation of the center line of the slideway from the design position is less than 5mm, the distance error between two slideways is less than 5mm, the relative elevation difference is not more than 1mm, and the front end of the slideway should not be lower than the back end. When selecting slideways, the length of slideways should be taken into consideration, and the distance between the anchor point behind the hanging basket and any end of slideways should be not less than 1cm. The front end of slideways must be equipped with steel plates to add anti-slip devices. 2. Inspection and installation of formwork system for hanging baskets: there are no quality defects in the anchor bolts and nuts, and the anchor pads are smooth. If necessary, two 32-gauge finish-rolled rebar will be added at the front sling position of each hanging basket. There are no quality defects in the steel wire rope and chain chain, and each joint on the steel wire rope has not less than 5 rope clamps. There shall be no less than 2 rear suspenders except running. Before pouring concrete, the supporting jacks of the front and rear suspenders of the hanging basket bottom die should check the locking condition of the locking pin and balance the locking and fastening force; The cushion of the safety pin should be fastened, and the jack should not be stressed. 3. Hanging basket walking: After the curing strength and elastic modulus of concrete meet the specification and design requirements, dismantle the internal formwork and stretch the prestressed tendons. After the tension and pressure drop is completed, dismantle the hanging basket formwork to reinforce the pull rod, loosen the rear anchor of the hanging basket and the front and rear suspenders of the formwork, and then drop the formwork. After the positioning of the hanging basket is adjusted, the pin pads of the front and rear suspenders are closely attached, and the front and rear suspenders are locked. When the hanging basket is working, the jack and chain can not be stressed. 4. Precautions for walking the hanging basket: The hanging basket can be demoulded after the longitudinal prestressing tendons are tensioned. When demoulding, the rear anchor device of the hanging basket should be removed first, and the height of the front and rear suspenders of the template should be controlled at about 3cm at a time to avoid excessive impact on the hanging basket when demoulding. The walking speed of the hanging basket is not more than 1cm/ min, and the position difference between the left and right rhombic frames of the same hanging basket before and after walking is not more than 5cm, and the position difference between the two hanging baskets of the same T structure before and after walking is not more than 4cm. 5, hanging basket should have someone who's in charge of safety matters when walking, the bottom die hanging, internal and external die hanging, wire rope, chain, supporting jack should be checked regularly, should make the walking wheel of walking beam play a sliding role, it is forbidden to operate illegally. In the process of hanging basket walking, the anchor rod and pole beam with unfixed back anchor position should be removed to avoid falling and hurting people during walking. 6. When the hanging basket walks to the design position, when the outer mold and bottom mold are lifted, 1.5~2cm should be reserved at the joint with the last beam section. After the front-end elevation and plane position are adjusted in place, the suspender should be tightened, so as to avoid bending the walking beam in the process of template adjustment. 7, hanging basket construction should be in accordance with the provisions, hanging safety net, it is forbidden to work in strong winds above level 6, and the objects on the cast beam section should be placed and the weight of the two hanging baskets should be balanced as much as possible. The hanging basket work area should be equipped with fire fighting equipment.

2. Safety precautions for the construction of crossing railway business lines:

For the construction of existing railway lines, we strictly abide by the Measures for the Construction and Safety Management of Railway Business Lines promulgated by the Ministry of Railways, and implement the "sitting system" for the construction of key points of business lines, and designate special personnel (trained and qualified resident liaison officers with certificates) to go through the registration and cancellation procedures in the driving room according to regulations, keep in touch with station attendant, and inform the construction site of the train operation at any time.

in the construction involving business lines and possibly affecting traffic safety, we have resolutely achieved the "eight prohibitions and one blockage", that is, no construction is allowed without a careful construction plan and effective safety measures; No construction is allowed without signing a construction contract and a construction safety agreement; No construction is allowed without a technical disclosure meeting; Construction related personnel are not allowed to work without training and certificates; The person in charge of construction is not clear, and the construction is not allowed until the cadres are on duty; Construction cooperation personnel are not allowed to work until they arrive at their posts; No construction is allowed until the construction protection personnel are in place; Safety supervision (supervisor) and quality supervision personnel are not allowed to construct without arriving at their posts; Confirmation before the opening of stuck construction and renovation and inspection after the point.

We require the operators working beside the existing lines to strictly abide by the "Eight Prohibitions": namely, it is forbidden for the protective personnel not to wear yellow clothes for their posts; It is forbidden for protective personnel to display stop signals at will; It is forbidden for construction personnel to sit, lie, rest or walk on the existing line; It is forbidden to carry out construction without protection according to regulations; It is forbidden for all kinds of construction machines, tools and materials to invade the clearance; It is strictly prohibited to pick up and jump during the train operation; It is forbidden to grab the road and drill the car; It is forbidden to avoid cars between two lines.

set up warnings, warning signs, slogans, etc. in eye-catching positions beside business lines and in construction areas of dangerous places to remind relevant personnel and pedestrians to pay attention to safety.

When disassembling, installing, replacing, testing and moving the existing equipment, strictly observe "Do not move without contact registration; Not clear about the performance and condition of the equipment; The "three immobilities" and "the equipment in use is not moving" are different, and the reasons are not clear; Affect the normal use of equipment, not repaired; After the work is completed, the "three-in-one" safety system is not tested.

Third, some routine specific practices:

First, make a plan and check the source. Set up a continuous beam construction scheme group to design the temporary facilities scheme of movable formwork, hanging basket and continuous beam support, and report it to the company for demonstration and review after verification, and construction can only be started after approval; The second is to strengthen leadership and check at all levels. Set up a safety leading group with the project manager as the team leader, organize site management personnel at all levels to study the construction scheme, and make disclosure step by step. Every worker from the leader to the front line must clearly understand where the safety hazards are and be aware of them. Third, the person in charge, clear responsibilities. The project department has designated personnel to supervise and inspect, and the work area and team set up full-time safety officers for each continuous beam, and formulated the responsibilities for the safety personnel at each level, and signed the safety liability form step by step. If there is any problem in any link, which person shall be investigated for responsibility, so as to ensure that the responsibility is horizontal to the edge and vertical to the end; The fourth is to strengthen training and raise awareness. All managers and constructors who participate in continuous beam construction, including those who require certificates, must undergo special training from the Safety and Environmental Protection Department of the brigade, and they can only take up their posts after passing the training; The fifth is to assess step by step and honor rewards and punishments. The Project Department shall formulate some safety management checklists, such as the Site Safety Officer Performance Appraisal Form, Continuous Beam Construction Hidden Danger Investigation Record Form, Safety Inspection Record, Safety Log, etc., and require safety management personnel at all levels to supervise and record the process in strict accordance with the requirements. The Project Department shall conduct spot checks from time to time, conduct assessment every month, and strictly honor rewards and punishments.

I believe that after the above introduction, everyone has a certain understanding of continuous beam construction safety. Welcome to visit Zhongda Consulting for more information.

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