Isolation safety scheme for the hottest portal and

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The isolation safety scheme of the opening and the protection and cross operation area

1. The protective measures of the opening

a. the side length of the opening at the plane of the floor, roof and platform is more than 25 cm, and it should be covered with a solid cover plate, which should be able to prevent movement or displacement

b. openings with a side length of cm at the floor surface, openings when prefabricated components are installed and openings temporarily formed when parts are missing can be covered with bamboo and formwork. When the cover plate is placed, it should be balanced around, and measures to fix its position should be set to prevent traction

c. cover the opening with a side length of 50-150 cm with a lattice made of steel bars, and then cover the lattice with bamboo fences or boards. In addition, the reinforcement penetrating the concrete slab can also be used to form protection, and the covering is paved on it. The spacing of reinforcement grids cannot be greater than 20 cm

d. for openings with a side length of more than 150 cm, protective railings must be set around the opening that is further enhanced by the market cooperation of the modified plastic, and a safety flat must be hung under the opening

is an old private enterprise with a copper production history of more than 20 years in Sichuan.

e. in case of temporary removal of protective facilities during construction, it must be approved by the person in charge of the construction site before removal, and a special person is responsible for guarding. When the operation is over, it should be restored immediately

f. at the openings, deep ditches, pipe pits, grooves, etc. next to the vehicle driving road, measures must be taken to prevent dragging on both sides of the protective cover plate added on it. Its material must be able to bear a load not less than twice the rated effective bearing capacity behind the truck, so as to prevent the vehicle from deflecting or driving out of the road and rushing to the opening plate

g. for vertical openings at walls, etc., tool type or fixed protective doors shall be installed at the openings that fall to the ground. The spacing of door grids should not be greater than 15 cm. Protective railings can also be adopted, and foot boards or foot fences of CM are set under them

is the development trend. H. When the height from the lower edge to the floor or bottom of vertical openings such as windowsills is less than 80 cm, and the external drop is greater than 2 meters, temporary protective railings up to 1.2 meters high should be added during the construction process, in order to prevent people from rushing over and falling. Other vertical holes that have the risk of falling to nearby people and objects should be covered or protected. These protective measures also welcome users to visit our company. There should be a fixed position to prevent displacement or removal

2. Safety measures for grade separation operation

a. when carrying out the construction of grade separation operation up and down, it is not allowed to operate in the same vertical direction at any time and in any place, and the horizontal distance between the upper and lower operation positions should be greater than the possible falling radius of the floor height. When setting the safety isolation layer, its penetration ability should not be less than the safety protection ability

b. when removing the formwork and scaffold, there shall be no other operators below. After removal, the temporary stacking place shall not be less than 1 meter from the edge of the floor, and the stacking height shall not exceed 1 meter. Any dismantled articles are not allowed to be stacked at the passage of the floor and the edge of the scaffold

c. the safety isolation layer shall be set up at the passageway of personnel entering and leaving the building beside the construction material hoist and other equipment, and the top of the protective shed shall be made of double-layer structure

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