Waterproof curtain and construction method thereof

Abstract

In the embodiment of the present invention, the water-stop curtain is formed on the outside of the foundation pit wall by the cement mixing pile and the cast-in-place pile being occluded, making full use of the bending resistance performance of the cast-in-place pile and the water-stop performance of the cement mixing pile, so that the operation is safe and the water-forming Reinforced concrete piles are neat and regular; cement mixing piles are used to occlude casing piles to form a water-stop curtain, which can effectively prevent water seepage, water leakage and quicksand in traditional foundation pits, and can effectively prevent collapse, necking and other types of punching and drilling The quality of piles is a common problem; compared with traditional underground diaphragm walls and bored occlusal piles, the construction speed is faster, the cost is lower, and the economic benefits are obvious; the cement mixing piles are constructed first to form the constraints of casing piles and avoid the casing piles. The problem of diameter expansion in soft soil layers; the use of casing piles for support, and the use of cement mixing piles to consolidate and harden the soil, reduce the excavation of earthwork and the impact on the surrounding geology, and reduce the impact of construction on the surrounding environment Impact and environmental pollution, green construction.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a water-stop curtain and a construction method thereof. Background technique [0002] With the rapid development of my country's construction market, a large number of high-rise and super high-rise buildings have emerged, and deep foundation pit projects are common in areas with high groundwater levels, areas close to reclamation, alluvial delta areas, and areas with complex geological conditions such as silt or quicksand. In order to realize the water-stopping purpose of deep foundation pits, various water-stopping curtains are provided in the prior art, including underground diaphragm walls, bored grouting occlusal piles and casing grouting occlusal piles. Among them, the underground diaphragm wall and cast-in-place occlusal piles are more common, and the one with lower cost and lower environmental impact is the water-stop curtain formed by the interlocking of casing-in-sit...

AI Technical Summary

Problems solved by technology

[0003] Since the second casing pile must be completed before the final setting of the concrete, this requires very high super-retarding performance of the concrete. Once the final setting time of the retarded pile is exceeded due to mechanical equipment failure, the first casing will be damaged. The cast-in-place pile and the second casing cast-in-place pile cannot form an occlusal relationship, and even cannot be constructed, which directly affects the water-stop effect between the piles

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