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 jointing of the casing grouting pile and the rotary grouting pile, and the bending resistance performance of the casing grouting pile and the water-stopping performance of the rotary grouting pile are fully utilized; the present invention can achieve wall The whole length of the body is seamlessly constructed, which can effectively prevent problems such as water seepage, water leakage, and quicksand in the foundation pit, and can effectively prevent common quality problems of other types of punching and drilling piles such as collapse holes and necking; the full-casing drilling rig is used to complete the hole piles, the earthwork excavation process will not damage the surrounding soil structure and the operation is safe, there is no mud pollution during the construction process, and the reinforced concrete piles formed by pouring are neat and regular; the earthwork excavation volume is lower than that of traditional punching and drilling piles and underground diaphragm wall technology Less, the impact of construction on the surrounding environment and pollution is small; the construction speed is faster and the cost is lower than the traditional underground diaphragm wall and drilled occlusal pile; the construction can be divided into multiple construction sections without causing leakage at the interface of the construction section , It is easy to form a flow construction operation, which improves the construction efficiency.

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. Deep foundation pit projects are common in areas with high groundwater levels, near reclamation areas, alluvial delta areas, silt or quicksand and other areas with complex geological conditions. In order to achieve the purpose of water stop for deep foundation pits, the prior art provides a variety of water stop curtains including underground continuous walls, bored cast-in-place occlusal piles, and casing cast-in-place occlusal piles. Among them, the more common underground continuous wall and cast-in occluding piles, and the lower cost and lower environmental impact is the water-stop curtain formed by the interlocking of casing cast-in-place piles. The water-st...

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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