Safety technical measures for hanging basket construction

Safety technical measures for hanging basket construction

Hanging basket is the main equipment in cantilever construction, which can be divided into truss type, cable-stayed type, steel structure type and mixed type according to the structural form. Below I will share with you the safety technical measures for hanging basket construction. Welcome to read and browse.

Hanging basket assembly should pay attention to the following points:

1, in order to ensure the safety of hanging basket construction, a hanging basket construction class should be equipped. Personnel should choose personnel with experience in hanging basket construction, strong safety awareness and strong sense of responsibility to carry out hanging basket construction, and be equipped with a commander with construction experience, flexible mind and certain command ability to conduct operation command.

2. The hanging basket should be debugged and assembled before use. After debugging and assembly, it is necessary to carefully check the connection firmness of all components, whether there are cracks in the weld of each joint, whether the bar will be deformed, whether the connecting fittings are complete and whether the dimensions meet the design requirements, and rectify the problems in time when found.

3. Preparation and inspection of machinery and equipment

(1) Jack: Before use, prepare the size of the jack used in each part according to the technical requirements, and conduct debugging and inspection. Unqualified jacks cannot be used.

② Chain reversal: Before use, carefully check whether each link of chain reversal is out of welding, whether the teeth of chain reversal are flexible, and whether the tonnage of lifting load meets the design requirements. It is forbidden to use small-tonnage chain-shifting instead of large-tonnage chain-shifting, so as to ensure the safety in the construction process. Safe use of wire rope: the thickness of wire rope used in all parts of the hanging basket should be prepared in strict accordance with the design requirements, and unqualified wire rope should not be used at will. The rings at both ends of the wire rope should be threaded, and it is forbidden to use U-shaped clips as rings at important positions to prevent the rope ends from slipping during use, causing safety accidents.

Safety precautions for hanging basket assembly:

(1) During the hanging basket assembly, the construction personnel must wear safety helmets and safety belts, and the upper and lower floors should be protected at the same time. It is forbidden to work straight up and down to prevent falling objects from hurting people.

(2) During the hoisting process, there is a special person to command, and irrelevant personnel are prohibited from entering the hoisting operation area.

(3) When assembling the hanging basket, the hoisting of all parts should obey the unified command of the commander, and it is forbidden to be blind and reckless to prevent accidents.

Safety technical requirements for hanging basket construction:

1. After the hanging basket is assembled on 0# block and 1# block, the static load test shall be carried out. At the same time, a special person should carefully observe the static load test, and concrete construction can be carried out only when the changes of various parts meet the safety technical requirements.

2. When the hanging basket moves: two sets of hanging baskets on the same T-structure must move synchronously and symmetrically, and the displacement difference shall not be greater than1000px; When moving, a safety chain should be installed at the back of the hanging basket, and the moving speed should not exceed 250px/min. Before the hanging basket starts to walk, the personnel in the hanging basket must be evacuated before it can be carried out. It is forbidden to stand or sit on the walking basket.

3. The bottom plate and web reinforcement of each cantilever beam section shall be hoisted in blocks, concrete shall be poured and the hanging basket shall be removed to ensure that the unbalanced weight on both sides of the T-shaped structure does not exceed 5T.

4, hanging basket template elevation adjustment, should be slow, at the same time should have a unified command. Before the hanging basket template swings, the position of the hanging basket, whether the back-end anchorage, fixation and suspender are installed firmly, and whether the personnel are evacuated must be checked in detail. , confirm the safety before swinging.

5, hanging basket construction power supply, lighting wires must be set up by an electrician, and often strengthen inspection, because hanging basket construction iron is more, in order to eliminate the hidden danger of leakage accidents.

6. In the process of suspension grouting construction, special personnel must be arranged to regularly check the use of key stress bars such as hanging basket anchor 555555555 fixed screw and front and rear suspenders, and strengthen the maintenance of mechanical equipment such as jacks, chains and steel ropes, and handle problems in time when found.

7. With the extension of cantilever, especially in summer, ventilation and cooling lighting facilities should be installed in time to improve the working environment of construction personnel.

8. The sulfur and mortar in the temporary support will emit a small amount of harmful pungent odor during the electric melting process, and the construction personnel should wear masks to prevent it.

When using truss hanging basket for construction, the following provisions shall be observed:

1) Before construction, organize relevant personnel to make safety technical disclosure and formulate safety technical measures. After the hanging basket is assembled, it is necessary to conduct a comprehensive inspection and do a static load test;

2) When the No.0 block is constructed on the pier and the cable-stayed bracket is used as the construction platform, safety protection facilities shall be set at the edge of the platform. The sidewalk slabs erected between the cable-stayed support platforms on both sides of the pier must be firmly connected.

Part of the platform should be reserved for curing and other operations after the formwork removal of block zero;

3) Machines and equipment used (such as jacks, pulleys, chain block, wire ropes, etc.). ) for inspection, is not in conformity with the provisions is strictly prohibited;

4) Check whether the position and firmness of embedded parts and cable-stayed steel belts of pier shaft meet the design requirements;

5) In case of strong wind and bad weather, the operation should be stopped;

Hanging basket construction safety:

1. When using the hanging basket, always check whether the rear anchor rod, jack, chain block, tensioning platform and safety rope are in good condition and reliable.

When the elevation of the bottom die is adjusted, it should be commanded by a special person. Workers should lay solid scaffolding under their feet and wear safety belts;

2. During the installation, walking and use of the hanging basket, the load should be strictly controlled to prevent excessive impact and vibration. If additional facilities (such as rain shelter, vertical derrick, cold shelter, etc. ), the hanging basket structure shall not be damaged, and its stress form shall not be changed;

3. Hanging basket assembly and cantilever assembly are dangerous. When working in high places and deep waters, safety nets should be set up, scaffolding should be spread all over, and temporary guardrails should be set up. Operators must wear safety protection articles and be equipped with life-saving facilities as required.

4. When the water tank is used as a balance weight, its position and water addition should meet the design requirements. Water supply and drainage facilities and methods should be reliable. During the construction period, regular safety inspections should be carried out in view of the above situation;

5. Before the bottom die swings, it is necessary to check in detail whether the position of the hanging basket, the weight of the rear end and the installation of the rear boom meet the requirements. The two suspenders of the upper beam should be connected with the lower beam of the bottom die before swinging;

6. The hanging basket should walk slowly, and the speed should be controlled within 0. 1m/min. At the back of the hanging basket, a group of zip lines are set to ensure safety. The slideway shall be laid flat, straight and without deviation, and observed at any time, and handled in time when problems are found.

7. When pouring concrete, the rear end of the hanging basket truss should be anchored on the completed beam section, and the weight should be balanced with the weight of the poured concrete. When the hanging basket truss is walking and pouring concrete, its stability coefficient shall not be less than1.5;

8. When pouring concrete in the closed section, the cantilever end should be pre-pressurized, and when the load is gradually withdrawn with the pouring process, it should be carried out from top to bottom. When withdrawing ballast, attention should be paid to prevent crushing;

9. The concrete contact surface of box girder should be chiseled with safety protection facilities, and the hammer handle used should be firm. Operators should keep a safe distance.

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