Safety precautions for key parts and links of construction sites during flood season?

What are the safety precautions for key parts and links at the construction site during the flood season? Below, Zhongda Consulting will give you a detailed introduction for your reference.

From June to August every year, most areas of our country are in flood season, and some areas in the south enter the flood season earlier. During the flood season, there are many strong winds and heavy rains, and natural disasters such as floods, landslides, and mudslides are prone to occur, which bring many unfavorable factors to construction safety production work. In my country, many major construction safety accidents occur every year during the flood season, which affects people's lives and Serious damage to property.

Key points of safety precautions for key parts and links of the construction site during the flood season:

1. Drainage at the construction site

(1) On-site hardening treatment should be implemented at the construction site according to standards .

(2) According to the general construction plan, planning and design of drainage plans and facilities, use the natural terrain to determine the drainage direction, and dig drainage ditches according to the specified slope.

(3) Set up continuous and smooth drainage facilities and other emergency facilities to prevent mud, sewage, and wastewater from flowing out or blocking sewers and drainage ditches.

(4) If the construction site is close to high ground, a water intercepting ditch should be dug on the edge of the high ground (upper side of the site) to prevent floods from rushing into the site.

(5) Before the flood season, dangerous rocks on the edge of the construction site near the mountain should be treated to prevent landslides and collapses from threatening the construction site.

(6) Designate a dedicated person to be responsible during rainy periods to dredge the drainage system in a timely manner to ensure smooth drainage at the construction site.

2. Transportation roads at the construction site

(1) The temporary road is arched by 5%, and drainage ditches with a width of 300mm and a depth of 200mm are made on both sides.

(2) For the parts of the roadbed that are susceptible to erosion, pave them with water-permeable and anti-slip materials such as stones, coke slag, and gravel, or set up culverts for drainage to ensure the stability of the roadbed.

(3) Designate a dedicated person to maintain the road surface during rainy periods, and repair and remove uneven roads or water accumulation in a timely manner.

3. Slope foundation pit support

(1) Excess spoil from the edge of the ditch should be removed before the flood season to reduce the pressure on the top of the slope.

(2) After rain, the slopes of pits, troughs, ditches and solid wall support structures should be inspected promptly, and special personnel should be sent to measure the deep foundation pits and observe the slope conditions. If any damage is found on the slopes, Take immediate measures to resolve any danger signs such as cracks, looseness, broken support structures, or movement.

(3) When slope slippage occurs due to rain, earthwork machinery construction should be stopped.

(4) Electric power blasting of earth and stone shall not be carried out in the open air during thunderstorms. If lightning is encountered during the blasting process, quickly connect the detonator pins and the two ends of the main wire to form a short circuit.

(5) Strengthen monitoring around the foundation pit and equip with sufficient drainage facilities such as submersible pumps to ensure timely drainage and prevent foundation pit collapse.

IV. Scaffolding Project

(1) In case of severe weather such as heavy rain, high temperature, lightning strikes and strong winds above level 6, scaffolding erection and dismantling operations shall be stopped.

(2) After strong winds, heavy rains and other weather conditions, organize personnel to check whether the scaffolding is shaking or deformed, and if any signs of tilting, sinking, loosening of wall parts, displacement of node connections and falling or opening of safety nets are encountered Problems such as ropes should be dealt with promptly.

(3) The bottom end of the floor-standing steel pipe scaffolding pole should be 50mm higher than the natural floor, and should be compacted and leveled, leaving a certain slope for water dispersion, and drainage measures should be set around to prevent rainwater from soaking the scaffolding.

(4) Cantilevered frames and attached lifting scaffolds must be reinforced before the flood season, and connectors or tie measures should be provided between the frame and the building according to the height of the frame.

(5) The hanging blue scaffolding should be dismantled before the flood season.

5. Electricity used in construction

(1) Strictly implement various safety measures for temporary electricity use in accordance with the "Technical Specifications for Safety of Temporary Electricity Use at Construction Sites" (JGJ46-2005).

(2) Various electrical equipment used in the open air should be placed in a higher dry place.

(3) The main distribution box, distribution box, and switch box should have reliable rainproof measures, and the welding machine should be equipped with a protective rain cover.

(4) Before the rainy season, lighting and power lines should be checked for mixed lines and leakage, and whether electric poles are corroded or loosely buried to prevent electric shock.

(5) During the rainy season, check whether the zero connection and grounding protection measures of on-site electrical equipment are reliable, whether the leakage protection device is sensitive, and whether the wire insulation joints are in good condition.

(6) Before heavy rains and other dangers occur, all temporary power sources at the construction site, except for lighting, drainage and emergency power, should be cut off.

(7) Overhead facilities such as tower cranes, external elevators, tic-tac-toe frames, gantry frames and higher metal scaffolding that are higher than the building at the construction site will not be protected by the lightning protection devices of adjacent buildings and structures. Outside the scope, lightning protection devices should be installed according to specifications.

6. Vertical transportation equipment

(1) Tower crane

1. If the self-elevating tower crane has an attachment device, the free height above the top level exceeds the design in the instruction manual If the height is high, two wire rope ties should be set towards the building.

2. If the self-elevating tower crane is not attached but has reached the maximum independent height specified in the design specification, four wire ropes should be installed diagonally.

3. A wire rope of φ15 or above should be used for the tie. The tie point should be set at the root of the first standard section below the turntable; the inside of the standard section at the tie point should be made of wood that is larger than the width of the standard section angle steel. as support to prevent the steel structure of the tower body from being strained; the angles between the four knotted ropes and the tower body should be consistent and controlled between 450 and 600; the steel wire ropes should be fixed with ground anchors, ground anchor baskets or connected to the building. Anchorage shall be carried out in the form of concrete structural connections that have reached the design strength; the tightness of the steel wire rope shall be adjusted to ensure that the tower body is in a vertical state.

4. All tower body bolts must be tightened, and the tower body attachment device should be fully inspected to ensure that there is no looseness, no open welding, and no deformation.

5. It is strictly prohibited to fix the front and rear arms of the tower crane to ensure free rotation. The lightning protection facilities of the tower crane must be intact and effective, and the power line of the tower crane must be cut off.

(2) Gantry (well frame) and construction elevator

1. Gantry (well frame) material hoist and construction elevator with wall-attached device must be Take measures to strengthen the wall-attached tie-down device;

2. For material hoists without wall-attached devices, the strength of cable wind ropes and ground anchors should be increased, or temporary wall-attached facilities should be installed for reinforcement.

7. Temporary facilities such as dormitories and offices

(1) The site must be located in a safe and reliable location, avoiding disaster areas such as landslides, mudslides, flash floods, and collapses.

(2) The construction site dormitories shall be assigned dedicated personnel to be on duty day and night. Each dormitory shall be equipped with no less than 2 flashlights. When discovering a dangerous situation, clearly remember the escape routes, locations and methods. When a typhoon approaches, workers are strictly prohibited from going to the beach to play or watch the waves.

(3) The color steel panel house should have a product certificate. If it is used as a dormitory or office, the foundation of the color steel panel house must be reinforced according to the address and local annual wind pressure value, and Make the color steel plate house firmly connected to the foundation to ensure the stability of the house.

(4) After the local meteorological department issues a severe convective (typhoon) weather forecast, all persons staying in temporary brick dormitories must evacuate to a safe location. All temporary accommodation personnel near the seaside, foundation pits, brick retaining walls and billboards must evacuate. All personnel in temporary construction facilities within the ground radius with the height of the tower crane must also evacuate.

(5) Temporary facilities such as dormitories and offices at the construction site should be renovated and reinforced before the flood season to ensure that they do not leak, collapse, or topple over, and that there is no accumulation of water around them, and that they are strictly protected against flooding into the room. After strong winds and heavy rains, the condition of the foundation and main structure of temporary facilities should be inspected, and problems found should be dealt with promptly.

In addition to strengthening protection and inspection work according to the key points of this measure, construction safety production work should also fully implement various national and industry laws, regulations, rules and technical standards and specifications related to safety production.

For more information about engineering/service/purchasing tender document writing and production to improve the bid winning rate, you can click on the official website customer service at the bottom for free consultation: /#/?source=bdzd