Construction method for preventing leakage of waterproof bottom plate of underground garage

Abstract

The invention belongs to the technical field of waterproof design and construction of underground engineering, and particularly relates to a construction method for preventing leakage of a waterproof bottom plate of an underground garage. The method comprises the steps that a polyvinyl chloride foam rod with a fan-shaped section is arranged at the external corner position of a concrete cushion layer at the position where the thickness of a waterproof bottom plate changes suddenly; a waterproof layer is laid above the concrete cushion layer, and when the waterproof layer bypasses the polyvinyl chloride foam rod, a natural transition arc is formed; a sliding layer is laid on the waterproof layer, and a concrete protection layer is poured; and waterproof bottom plate steel bars are bound, and waterproof bottom plate concrete is poured. The national technical problems of waterproof bottom plate structure cracking and waterproof layer tearing and leakage are solved, the use function and structural durability of the waterproof bottom plate can be guaranteed, and the maintenance cost of waterproof engineering is greatly reduced. The method is suitable for waterproof design and construction of the waterproof bottom plate of the underground garage and waterproof design and construction of connection joints of post-cast strips, independent foundations, main building foundation rafts, retaining wall strip foundations and the like and the waterproof bottom plate.

Description

technical field [0001] The invention provides a construction method for preventing leakage of the waterproof floor of an underground garage, which belongs to the technical field of underground engineering waterproof design and construction, and is suitable for the waterproof design and construction of the waterproof floor of the underground garage and its post-pouring belt, independent foundation, main building foundation raft, and retaining Waterproof design and construction of joints connecting soil wall strip foundation and waterproof bottom plate. Background technique [0002] At present, underground garages or underground civil air defense projects are generally designed in civil buildings in my country, which belong to the category of underground waterproof engineering design and construction. In underground garages or underground civil air defense projects where the groundwater does not meet the requirements for anti-floating defenses, a 250mm thick waterproof bottom ...

AI Technical Summary

Problems solved by technology

However, when the permeability coefficient of the bearing layer of the waterproof bottom slab is ≤0.05m / d, the mid-span deflection of the waterproof bottom slab is often caused by the temporary rise of the water level during the rainstorm, and the independent foundation, the raft slab of the main building foundation, the strip foundation of the retaining wall, and the post-pouring belt Shear cracks and leakage occur at the sudden change in the thickness of the joints connected to the waterproof bottom plate, which seriously affects the waterproof function and structural durability of underground engineering, and has become a national technical problem that needs to be solved urgently.

[0003] In the traditional underground waterproofing project, the waterproof layer is firmly pasted on the concrete cushion, so the elongation of the waterproof layer cannot be exerted.

Under the action of groundwater buoyancy and temperature stress on the waterproof bottom plate, brittle fracture and leakage of the waterproof layer occur, which seriously affects the quality of underground waterproofing projects

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