Foundation pit support and water stop integrated structure and construction method thereof

Abstract

The invention discloses a foundation pit support and water stop integrated structure and a construction method thereof. The foundation pit support and water stop integrated structure comprises a concrete wall, wherein the concrete wall is arranged under the ground of the periphery of a foundation pit, and a plurality of cylindrical reinforcement cages are vertically arranged in the concrete wall. The construction method of the foundation pit support and water stop integrated structure is characterized by comprising the following steps of excavating a guide channel, casting a guide wall, forming a channel in the channel section, arranging the reinforcement cages, casting concrete, and the like. The foundation pit support and water stop integrated structure and the construction method have the characteristics that the rigidity of an underground continuous wall is large, and the water stop effect is good; the installation of the reinforcement cages of a row pile support structure is convenient and rapid, the technology difficulty is low, the construction is rapid, the quality can be easily controlled, and the foundation pit support and water stop integrated structure is especially suitable for water-rich sandy gravel ground layers.

Description

technical field [0001] The invention relates to the field of building construction, in particular to an integrated foundation pit support and water-stop structure and a construction method thereof. Background technique [0002] With the increasing scale of underground space development and utilization, the construction of underground space under complex hydrogeological conditions due to high water level and high permeability causes leakage of foundation pit support structures. The quality is not easy to control, and it also gives The progress of the construction of the main structure of the underground space caused difficulties. [0003] Currently commonly used vertical support systems include row piles, drilled occlusal piles, underground diaphragm walls, and cement-soil walls. Although the cost of the row pile support system is low, due to the discontinuity of the piles, it is generally necessary to add water-stop measures such as water-stop curtains to ensure the safe us...

AI Technical Summary

Problems solved by technology

Although the cost of the row pile support system is low, due to the discontinuity of the piles, it is generally necessary to add water-stop measures such as water-stop curtains to ensure the safe use of the system. There have always been hidden dangers in the combination of water structures. The practice of adding curtains behind the piles, the piles and the curtains are integrated, the force is uneven, and the piles need to be connected by crowns and beams. When the curtain has water leakage points behind the piles, it is difficult to detect. , and it is also difficult to repair; the drilled occlusal pile system is prone to pile deviation and cutting deformation during construction. Once the pile position deviates and deforms, it will affect the support and water-stop effect of the occlusal pile support system ; The support of the underground diaphragm wall system is safe and reliable, but the amount of steel bars is large, and placing a large square steel cage in the groove section during construction requires a large area and heavy hoisting equipment. Two-machine lifting operation mode; although the cement wall support system has good continuity and can effectively stop water, the strength of cement soil is very low. In use, it is generally necessary to add a large amount of section steel and a large number of anchor rods to make up for the lack of strength. , not only economically wasteful, but also a large number of bolts are constructed below the groundwater level, and there are certain safety hazards in the construction process itself

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