Lattice type combined steel sheet pile cemented soil composite pile and construction method thereof

Abstract

The invention discloses a lattice type combined steel sheet pile cemented soil composite pile and a construction method thereof. The lattice type combined steel sheet pile cemented soil composite pile comprises linear steel sheet piles (3), narrow wing I-shaped steel (2), cemented soil deep mixed piles (1), pile top crown beams and supports in a foundation pit. The combined steel sheet piles are inserted into the cemented soil deep mixed piles, so that cemented soil is sealed in lattices of the combined steel sheet piles, the stressed state of the cemented soil is changed, and the unidirectional stretch bending stress state of the cemented soil, arranged on the outer side of profile steel in a traditional construction method, of the lattice type combined steel sheet pile cemented soil composite pile is changed into a three-way pressured state. According to the lattice type combined steel sheet pile cemented soil composite pile and the construction method thereof, the lateral rigidity of a traditional SMW construction method pile is substantially improved, and the defect that the lateral rigidity of the traditional SMW construction method pile is relatively small is overcome; meanwhile, the characteristics of being good in waterstop performance, high in construction speed, recyclable in steel, good in economy and the like of an original technology are inherited; and the lattice type combined steel sheet pile cemented soil composite pile and the construction method thereof are suitable for soft soil, floury soil and silt stratum foundation pit engineering supporting structure which is large in excavation depth and high in underground water level.

Description

technical field [0001] The invention relates to a lattice-type combined steel sheet pile cement-soil composite pile and a construction method thereof, and belongs to the technical field of geotechnical engineering foundation pit support. It is suitable for the enclosure structure of foundation pit engineering with excavation depth and shallow groundwater level, especially in soft clay, silt and other geological conditions with high water content. Background technique [0002] In the application of the traditional SMW construction method piles in the foundation pit support structure, the lateral stiffness is mainly borne by the inserted profiles, and the cement-soil mixing piles as flexible piles or semi-rigid piles can hardly consider the contribution of the lateral stiffness, so the traditional SMW construction method In the practical application of the pile, the horizontal deformation is relatively large, which is also the bottleneck of the popularization and application o...

AI Technical Summary

Problems solved by technology

For SMW piles, if the lateral stiffness of the entire composite pile is increased only by increasing the stiffness of the profile, the cost of steel will increase sharply, and the section of the pile will also expand, which will inevitably reduce its economic efficiency and construction difficulty. increase

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