Construction safety protection measures in rainy season

Construction safety protection measures in rainy season

The project builder should be familiar with and master the relevant safety production operation procedures, and help urge the production team to abide by the safety production rules and regulations and the safety production technical operation procedures of this type of work. The following are the safety protection measures for rainy season construction that I have compiled. Welcome to read and browse.

First, the office drainage

1, check whether there is any leakage on the roofs of offices, dormitories and warehouses, and repair the leaking parts in time.

2. The outdoor ground is fully hardened, the drainage slope of the road site is correct, and the drainage ditch is unobstructed to ensure that there is no water on the construction site.

Second, the construction site drainage

1, before the rainy season, focus on the underground layer of the key prevention parts of the project, and set around the main body 300 meters along the ground. 500(b？ H) Open drain, when it rains, it is equipped with a water pump to drain the sump and drain the water into the ground drain.

2. Organize the construction site to ensure smooth drainage.

3. Check the drainage facilities inside and outside the site to ensure that the drainage facilities are in good condition and that the accumulated water can be discharged in a short time after the rainstorm. According to the actual situation, based on the principle that the collecting well on the construction site is nearby, it is regarded as the drainage concentration point on the site.

Three. residence

1. Before the rainy season comes, the project logistics personnel should check the temporary houses in the living area, mainly including whether there are hidden dangers such as rain leakage, stability and lightning strike, and rectify them in time when problems are found.

2, check the canteen, toilets and other drains, timely dredge sewage pipes. Clean the septic tank before the rainstorm to prevent the septic tank from overflowing due to the rainstorm.

3, the construction site dormitory, the foundation of the fence should be more than 300mm higher than the natural ground, and lime-sand brick as free feet, to ensure the safety of this part of the structure. Indoor ground should be higher than outdoor 100mm to prevent rainwater from soaking.

Four, storage and stacking of raw materials and semi-finished products

1. When steel bars are stacked on the construction site, they should be placed in a higher place and protected from rain. At the same time, the lower part of the steel bar should be padded with wood square and other materials not less than 200 mm For the processed steel bar, it should be placed in the shelter of rain in the steel bar processing shed as far as possible to prevent the steel bar from being corroded by rain.

2, cement to build warehouse, to do a good job of warehouse rain and ground moisture, prevent be affected with damp. Other materials should be stacked according to their properties.

3. All materials shall be piled up in a safe place not less than 3m outside the foundation pit slope, and materials that are easy to scatter shall not be piled up beside the slope.

V. Earthwork

1, the compacted lime soil has just been paved, and the water content of backfill soil should be strictly controlled in the earthwork backfilling construction in the rain period.

Timely sampling test, control the water content of backfill soil within the design requirements. If the water content is high, measures such as scarifying, airing or evenly mixing dry soil can be adopted. When necessary, cover the soil source in advance to avoid rubber soil.

2. If it is soaked by rain, the soft lime soil in the water accumulation area should be removed and compacted with new lime soil. Soaked lime soil should be compacted after drying. Lime and soil should be covered with plastic film to prevent rain.

Six, slope engineering

1, it is forbidden to pile up materials within one meter of the slope during the rain period.

2. Before the rain period construction, check whether there are deviations and cracks in the slope, and use cement mortar to find the slope to the drainage ditch to keep the slope from accumulating water.

3, completes the slope settlement records, met with heavy rain above the weather should be measured at any time.

Seven, steel engineering

1, rebar shall enter the site appropriately according to the progress of the project, and rebar raw materials shall not be stored too much. On-site raw materials should be used in the advanced site first, and then used after entering the site, so as to avoid serious corrosion of steel bars due to long storage time. Corroded and polluted steel bars should be cleaned before use. Raw materials and finished steel bars entering the site shall be neatly stacked according to the specifications, and shall be padded above 200mm from the ground, and temporarily covered with plastic sheets to prevent rain.

2. Welding is strictly prohibited in thunderstorm weather. When welding under special circumstances, necessary rainproof measures must be taken to prevent the rain from wetting the welded joints and affecting the engineering quality.

3. In case of rainy days, the steel bars after binding shall be properly derusted and decontaminated, and the corroded and slimy steel bars shall not be used in the project.

Eight, template engineering

1, templates and wood squares piled on site should be packed neatly, padded more than 200mm from the ground, and covered with tarpaulin to avoid sun and rain deformation.

2. In case of heavy rain, when concrete is not poured, the wall formwork that has been erected should be covered to prevent the release agent from failing due to rain. After the rain, carefully check its flatness, verticality and adhesion of release agent, and concrete can be poured only after it is qualified.

Nine, concrete engineering

In order to accurately grasp the weather forecast, concrete pouring should avoid rainy days as much as possible. In case of rainstorm, the following measures should be taken: 1. In case of heavy rain during concrete pouring, the poured concrete should be vibrated and compacted, and the construction joints should be left in a proper position in time according to the specification requirements, and then the pouring should be stopped immediately and covered with plastic sheets, which should be firmly bound with steel bars to prevent being blown away by the wind. In case of light rain, the roof concrete should be vibrated, plastered and covered in time to ensure that the cement slurry does not run off.

2. Strengthen the treatment of temporary construction joints after the rain, remove cement slurry and weak points, clean up dirt and water in beams, plates and walls, and then continue pouring concrete.

3. In order to ensure the quality of concrete, in the rainy season, concrete mixing manufacturers are required to adjust the water consumption of concrete in time according to the actual moisture content of sand and gravel to ensure the quality of concrete. And regularly send people to the mixing station to check its sand yard and cement warehouse, and check the silt content of sand and the waterproof situation of cement. It is forbidden to use sand, stone and invalid cement with excessive silt content in the project.

X. temporary electricity safety

1. In rainy season, it is necessary to check the insulation status of temporary power facilities regularly and by designated personnel, and check whether the power cord is damaged. When problems are found, they should be dealt with in time.

2. The temporary power supply line on site adopts three-phase five-wire wiring, and the switch box and lamps of mechanical and electrical equipment have rain-proof facilities. All mechanical and electrical equipment must be equipped with a single switch, and it is forbidden to use one switch for multiple purposes, and a leakage protector should be installed. When the machine is stopped, the switch box should be locked and inspected and tested before use.

3. Qualified leakage protection devices must be installed in the distribution box. Check the sensitivity of the leakage protection devices in time and close the door of the electric box at any time.

4, engaged in electrical operations personnel must hold relevant certificates, wear labor protection articles, and should be two people at the same time, one homework, one care.

Eleven, tower crane foundation and hoisting

1, tower crane should be timely line inspection and subgrade inspection after rainy days, and idle running, to ensure that there is no problem before formal hoisting.

2, observe the foundation settlement, and make observation records, if there is any settlement should be dealt with immediately, to ensure the safety of tower crane when using. In case of heavy rain, rainstorm and strong wind, the hoisting operation should be stopped.

3. Aerial work personnel should pay attention to anti-skid and wear rubber-soled shoes. Hard-soled shoes are not allowed to work at high altitude. The grounding resistance value of tower crane shall be measured, and the resistance value shall not be greater than 4 ohms.

4. Dig 200mm around the tower crane foundation? 300mm drainage ditch is connected with the temporary drainage ditch on site, and the inside is plastered. Set 5 at the bottom of the ditch? The slope of running water.

5. Set four settlement observation points on the tower foundation, and conduct settlement observation regularly and after the rain, and handle the problems in time when found.

Twelve, scaffolding engineering

1. Check whether the outer frame, especially the high outer frame, is designed and installed with a relatively perfect lightning protection device.

2. Anti-skid in rainy season. Necessary anti-skid facilities shall be set at the working face, walkway and other places where people pass. ....

3. A drainage ditch shall be set on the outside of the scaffold upright post to drain rainwater in time to avoid the foundation sinking caused by the scaffold foundation being soaked by rain. Before it rains, designated persons shall check whether the vertical pole stow-wood is effective and whether it collapses; Whether the foundation sinks after the rain, whether the vertical pole sinks and whether the scaffold is deformed, if there is any abnormality, it must be reinforced and trimmed quickly.

4, during the heavy rain, scaffolding shall not be erected and dismantled; After heavy rain and strong wind, the scaffold should be inspected and maintained in time, and it can only be put into use after the rectification of potential safety hazards is qualified.

5, scaffolding foundation should be strong, should be set up under the stud tong long stow-wood or block.

6. The special channel for backfill construction erected on the outer frame must be dismantled and erected in strict accordance with the structural requirements of fastener-type steel pipe scaffold hole in JGGJ130-201Technical Specification for Building Construction Safety, and can only be used after being inspected and accepted by the on-site safety officer.

Thirteen. road engineering

1, do a good job in the drainage system of the construction site to prevent the subgrade from being soaked by rain for a long time. Assign special personnel to patrol when it rains, and dredge the drainage in time when water or blockage is found. 5 on each side of the shoulder? 10m Dig a horizontal drainage ditch to drain the rainwater to the side ditch.

2. Concentrate on shortening the road section, speeding up the construction progress, and avoiding all-round spreading.

During the construction of lime-fly ash macadam, attention should be paid to the weather change to ensure the survival of paving and rolling, and it should be completed before the rain, so as to prevent the paved lime-fly ash macadam from being poured in the rain without rolling and unable to continue the construction.

3. Take necessary rainproof measures according to local conditions. The compacted lime-fly ash macadam layer has a certain influence on the rain-proof ability. Therefore, when the subgrade survives, the gravel layer should be prepared as soon as possible. After the arrival of lime-fly ash macadam, when it rains suddenly and it is too late to spread and roll, it can be temporarily stored in a large pile, and the surface can be compacted or covered with tarpaulin.

Fourteen landscape engineering

1. In case of rainy weather during the construction of salt spraying layer on green soil, the operation shall be stopped immediately, and the construction shall be carried out after the water content meets the requirements to prevent the green soil from being crushed into mud by machinery.

2, trees, lawn construction should pay attention to not be washed away by rain before planting, to prevent soil from being washed away by water, resulting in low plant survival rate.

3, soil fertilization to avoid rainy weather.

Fifteen, equipment installation project

1, the protection of raw materials and semi-finished products, can enter the warehouse or floor to cushion high pattern and ensure good ventilation, especially the entrance of thermal insulation materials, it is forbidden to rain and soak, and measures such as rain protection must be taken in time. Mechanical and electrical warehouses should have measures to prevent water from entering, and warehouses storing electrical materials or other materials and equipment that need moisture protection should be equipped with exhaust fans to keep the warehouse ventilated.

2. Materials piled in the open air, such as pipes or equipment, should be padded and covered with plastic sheets to prevent rain.

3. The mechanical and electrical equipment entering the site after unpacking must take rainproof measures to minimize outdoor storage.

4. The reserved holes of the equipment should be protected from rain. If the underground equipment of the construction site has been installed, measures should be taken to prevent the equipment from being affected with damp and being soaked by rain.

5, shearing machine, silk machine and other electromechanical processing equipment should have rain-proof facilities.

6. Outdoor welding is not suitable for rainy days; Attention should be paid to the dryness of the work area during indoor welding operation; Covered electrode should be dried before welding in rainy season; When welding in narrow space, effective ventilation measures should be taken.

7. Not suitable for lifting equipment in rainy days.

Sixteen, lightning protection

1, the harm of lightning

The hazards of lightning are mainly manifested in the following aspects:

1) Mechanical effects of lightning: damage electromechanical equipment, towers and buildings, and harm people and animals.

2) Thermal effect of lightning: burning wires and electrical equipment.

3) Lightning electromagnetic effect: overvoltage, electrical insulation breakdown, even fire and explosion, causing personal injury or death.

4) Lightning flashover discharge: insulators and circuit breakers burn out, resulting in power failure or tripping of the line and fire.

5) Lightning activity exists objectively and is an inevitable natural disaster, which is independent of human will, and necessary measures must be taken, so lightning protection is an important link.

2, lightning protection measures

1) In order to protect buildings, mechanical and electrical equipment, people and animals from lightning damage and injury, lightning rods, lightning strips, lightning arresters, down leads and grounding electrode groups are generally installed for lightning protection.

2) The temporary work shed, construction platform and dormitory on the construction site shall take lightning protection and grounding protection measures according to the actual situation. Set lightning rod, down lead and grounding group for lightning protection.

3) The lightning protection device must be well grounded, and the grounding resistance of the grounding device must be regularly checked and measured. The grounding resistance of its independent grounding electrode is not more than 4 ohms, otherwise it should be handled in time.

4) Regularly inspect the lightning protection grounding device, strengthen daily maintenance, and focus on checking whether the grounding wire is damaged, broken and corroded.

5) During the lightning season, observe the lightning activity. In thunderstorm weather, construction personnel should be indoors, and outdoor high-altitude and outdoor operations are not allowed.

6) Stay away from trees and masts when it is impossible to hide in buildings with lightning protection facilities.

7) It is not advisable to open an umbrella in the wild, or carry steel pipes and shovels on your shoulders.

8) It is not suitable to enter low-rise buildings such as temporary shacks and sentry boxes without lightning protection facilities.

9) When lightning is frequent and intense, personnel should not get close to lightning protection devices such as lightning rod, lightning arrester and down lead, do not take shelter from rain under trees, do not touch antennas, water pipes, barbed wire, metal doors and windows, external walls of buildings, and stay away from equipment with wires or other similar metal devices to prevent lightning damage.

10) Electrical equipment without lightning protection measures or with insufficient lightning protection measures shall not be used.

1 1) Don't stand on the roof or near objects with high conductivity. Never handle flammable materials in open containers.

;