Precautions for safe electricity use in construction site construction in the rainy season

Construction measures in the rainy season.

In order to ensure the quality and safety of the project, the following technical measures for construction in the rainy season are formulated.

1. Technical measures for construction in the rainy season.

a) Earthwork backfill.

When the top surface of the backfill soil should have a slope, close to the root of the building wall should be 20-30cm higher than the site to prevent rainwater from backing up the foundation. According to the natural slope of the site, drainage ditches and sumps should be set up in the site to ensure that there is no stagnant water in the site. Tower cranes, gantry.

The site where the mixer and other equipment are located should be appropriately higher than other floors, so as not to affect the normal operation of water accumulation.

2) When pouring concrete, it is necessary to prepare enough rainproof materials for covering (color striped cloth, straw bags, etc.) in the event of sudden rain, the concrete that has not reached the final setting should be covered to prevent rainwater from washing the concrete and causing the loss of cement slurry.

3) The moisture content of sand and stone in the rainy season.

Larger, mortar and concrete mix ratio should consider its water consumption, and the mix ratio should be adjusted when measuring. When the mortar is transported, it should be covered in the rain to prevent the loss of cement slurry.

4) Wooden components and materials that are afraid of water should be placed in the warehouse or covered and stored on higher ground.

2. Construction safety measures in the rainy season.

1) Do a good job in the layout of the drainage ditch on the site in the rainy season, and do a good job in cleaning and dredging the drainage ditch to achieve no water accumulation in the rainstorm site.

2) Pave the construction road in the site, so that it can be passed after the rain, and the road surface should be repaired frequently to ensure the safety of traffic.

3) In case of rain, the foundation pit or high-altitude construction work should be stopped.

4) The site of stacking templates, trusses, etc. should be inspected after the rain to prevent tilting due to ground subsidence and safety accidents.

5) Do a good job of rainproof electrical equipment to prevent damage to lines and equipment due to short circuits in rain, so as to avoid electric shock accidents.

6) Open-air welding operations shall not be carried out on rainy days.

Check it comprehensively before going to work, prevent leakage of wet wires in construction, and the construction personnel must wear safety protection work, operate in strict accordance with the safety regulations of electricity, and eliminate all unsafe factors.

In the rainy season, the construction site uses electricity safely, the electrician checks it every day, stops the machine and loses the power, the bad line is replaced immediately, and the anti-pressure pipe can not be overhead when crossing the route.

Workers must wear safety helmets when entering the construction site, and they must wear insulated shoes when working electrically.

The power supply of electrical equipment should be erected and installed in accordance with the relevant regulations, and the construction should be "one machine, one gate, one box, and one leakage protection", and the electrical equipment must have good grounding and zero, and be equipped with reliable electric shock protection devices.

The on-site line must be neatly arranged according to the regulations, and it is not allowed to be dragged on the ground to prevent crushing; Signs are installed when buried underground. After the joint is bandaged according to the standard, it must be overhead or set up with a joint box and have waterproof measures, and all wires on the pile frame and chassis are strictly forbidden to have joints.

The distribution box shall be installed with a leakage protection switch, and there shall be rainproof measures, and the door shall be installed and locked.

The wiring of the power line and the electrical box is accurate, the insulation is reliable, the grounding is firm, the electric shock protector is sensitive and effective, and the power supply capacity and wire cross-section meet the requirements of the safety electricity specification.

The electrical box on the drilling rig is in good condition, the motor is grounded and connected to zero firmly and reliably, and the electric shock protector is sensitive. It is forbidden to start the motor with load, and it is strictly forbidden to operate it with your feet.

The cables used in the drilling rig should be checked regularly, and the joints must be tied firmly to ensure that they are impermeable, leakage-free and overhead.

The electrician can not operate with electricity when wiring, and should hang a warning sign of "strictly forbidden closing" at the closing place when dismantling and repairing, and send a special person to take care of it.

The power supply lines in the construction site should be overhead or trenched and buried, and the insulation of the electrical lines should meet the safety requirements.

1. The metal shell of electrical equipment should be protected by grounding or zeroing.

2. Install an automatic power-off device with leakage protection function.

3. Use safe voltage as much as possible.

4. Ensure that the electrical equipment has good insulation performance.

5. Adopt electrical safety appliances.

6. Set up a screen protection device.

7. Ensure the safe distance between people or objects and charged bodies.

8. Regularly inspect electrical equipment.

Safety technical measures for electrical circuits:

1. All electrical circuits at the construction site are powered by the "three-phase five-wire system" (TN-S system) special protection zero (PE line) system.

2. The overhead line at the construction site adopts insulated copper wire.

3. Overhead lines are set up on special poles, and it is strictly forbidden to erect them on trees and scaffolding.

4. Keep a sufficient safety distance between the wire and the ground. The minimum vertical distance between the wire and the ground: the construction site should not be less than 4m; The motorway should not be less than 6m; The railway track should not be less than.

5. If the specified electrical safety distance cannot be guaranteed, protective measures must be taken.