Double-row SMW construction method pile foundation pit supporting structure and construction method thereof

Abstract

The invention provides a double-row SMW construction method pile foundation pit supporting structure. The double-row SMW construction method pile foundation pit supporting structure comprises a first cement soil mixing pile supporting wall close to a foundation pit and a second cement soil mixing pile supporting wall away from the foundation pit, the two cement soil mixing pile supporting walls are formed by sequentially overlapping first cement soil mixing piles in a lap joint mode, H-shaped steel is inserted into the first cement soil mixing piles, the two cement soil mixing pile supporting walls are connected through a plurality of rigid connecting pieces, a plurality of mixing pile walls are arranged on the side, away from the foundation pit, of the second cement soil mixing pile supporting wall, the mixing pile walls are formed by overlapping second cement soil mixing piles in a lap joint mode, H-shaped steel is inserted into the second cement soil mixing piles, and the two ends of the mixing pile walls are connected with the second cement soil mixing pile supporting wall to form a partition bin. According to the double-row SMW construction method pile foundation pit supporting structure, a leakage point can be quickly found to accelerate the construction water stopping speed, and meanwhile, the strength of the SMW construction method pile can be improved to adapt to larger excavation depth.

Description

technical field [0001] The invention belongs to the field of foundation pit support, and in particular relates to a double-row SMW pile foundation pit support structure and a construction method thereof. Background technique [0002] The SMW construction method is to use a special multi-shaft mixer to drill and cut the soil on the spot, and at the same time, inject the cement slurry into the soil at the end of the drill bit. After fully mixing and mixing, insert H-shaped steel or other profiles into the mixing pile to form an underground continuous pile. The wall is used directly as a soil retaining and water-stop structure. In the excavation of the foundation pit, structural support forms such as braces, corner braces or cross braces are often used. [0003] The patent with the application number CN202021546955.4 discloses a double-row combined SMW construction method pile support structure. By setting two layers of SMW construction method piles and using a support frame to...

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Problems solved by technology

[0005] Aiming at the deficiencies in the existing technology, the present invention provides a double-row SMW pile foundation pit support structure, which improves the problems that the existing SMW pile foundation pit support structure cannot quickly find the leakage point and the construction water stop speed is slow

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