Foundation pit supporting structure having dewatering function and construction method of foundation pit supporting structure

Abstract

The invention relates to a foundation pit supporting structure having a dewatering function and a construction method of the foundation pit supporting structure. The foundation pit supporting structure comprises inner supporting row piles inserted into a soil mass on the periphery of a foundation pit, outer supporting row piles inserted into a soil mass on the periphery of the inner supporting row piles, and sway braces penetrating through and supported on the outer supporting row piles, the inner supporting row piles and a reinforced soil mass, and inserted into the soil mass on the bottom of the foundation pit; the reinforced soil mass is formed between the outer supporting row piles and the inner supporting row piles; the parts, located in a region of the reinforced soil mass, of the sway braces are provided with a dewatering mechanism, and the reinforced soil mass is subjected to dewatering by the dewatering mechanism. The sway braces in the foundation pit are supported on the double rows of piles, and the parts, located between the double rows of piles, of the sway braces are provided with the dewatering structure, such that the sway braces not only play a role of supporting the double rows of piles but also can perform dewatering on the soil mass between the double rows of piles, therefore, the soil mass between the double rows of pipes is reinforced, a dewatering well is not required to be arranged additionally, and further the effects of accelerating the construction progress and saving the construction cost are achieved.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a foundation pit support structure with a dewatering function and a construction method thereof. Background technique [0002] At present, the support structure for soft soil foundation pits generally adopts cement-soil gravity retaining wall, bored pile + pit support or vertical steel pipe front support structure, but the three have their own advantages and disadvantages. [0003] In the Chinese patent application publication specification, CN105442618A, aiming at the defects of the above three widely used support structures, a vertical foundation pit support structure with no barriers in the pit is disclosed. The multiple functions of soil retaining and water sealing restrain soil deformation, enhance the stability of the foundation pit wall, and realize barrier-free construction in the pit. [0004] But in this invention scheme, in order to increase the soil str...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the defect of prior art, provide a kind of foundation pit supporting structure and its construction method with dewatering function, can solve existing foundation pit supporting structure to the precipitation of soil body between double-row piles must be in A dewatering well is set between the two support piles, which affects the construction progress and increases the construction cost

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