Construction method of model-building concrete between fender piles of subway station

Abstract

The invention provides a construction method of model-building concrete between fender piles of a subway station. The construction method comprises the following steps that (1) the fender piles are pretreated; (2) reinforcing steel bars are implanted into the side, facing the model-building concrete, of the fender piles; (3) a first reinforcing mesh is laid on the side, facing the model-building concrete, of the fender piles; (4) a template is arranged on the side, facing the model-building concrete, of the fender piles; (5) a first layer of concrete is poured between the template and the first reinforcing mesh, a second layer of concrete is poured after the first layer of concrete is poured, after concrete pouring is completed, the concrete is covered and watered, and the number of timesof watering meets the requirement for keeping the concrete in the wet state. By the adoption of the construction method of the model-building concrete between the fender piles of the subway station, the waterproof effect and the water stopping effect of an initial supporting system can be improved, a waterproof base face mortar leveling technology is simplified, and the chip off-falling hidden danger of a leveling layer is eliminated.

Description

technical field [0001] The invention relates to a construction method for molded concrete between retaining piles of a subway station. Background technique [0002] Some subway sections adopt open cut (partial cover excavation) sequential construction during the construction stage, and the foundation pit support system adopts bored piles + rotary grouting piles + internal support system, and the original design between the piles in the pit uses strong shotcrete and steel mesh slices as the primary branch system. The primary support system is the first waterproof measure of the station waterproof system. [0003] The waterproof level of the station is designed to be Class I, water seepage is not allowed, and there is no wet stain on the surface of the structure. The surrounding structure of the foundation pit adopts bored cast-in-place piles + jet-sprayed piles water-stop curtain + internal support system. During excavation, precipitation in the pit is used, and sprayed con...

AI Technical Summary

Problems solved by technology

[0004] 1) The shotcrete base surface needs to be leveled twice, which affects the construction progress of the main body;

[0005] 2) The leveling layer is easy to fall off and affects the laying quality of the waterproof layer;

[0006] 3) Affected by the compactness, the sprayed concrete with hanging nets has many holes and is prone to water seepage

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