A Supporting Structure Between Reinforced Steel Sheet Pile and Core Tube in Deep Foundation Pit

Abstract

The invention discloses a support structure in which a reinforced steel sheet pile and a core tube are oppositely supported in a deep foundation pit, which comprises a basin-type excavated foundation pit and a core tube arranged in the center of the foundation pit, and a continuous seal is provided around the foundation pit steel sheet piles, a reinforced soil platform is reserved inside the steel sheet pile, and multiple horizontal support beams are arranged between the core tube and the steel sheet pile. Form the internal support and back pressure for the steel sheet pile, and then after pouring the core tube of the middle body, use the core tube as a support point to erect a horizontal support beam between the steel sheet pile and the core tube, and then excavate the surrounding soil platform to realize the replacement of the support , by reserving the reinforced soil platform as a transitional support, the deformation of the steel sheet pile in the deep foundation pit can be effectively reduced, and the safety of the support structure can be improved. 12 meters deep foundation pit as an application of the enclosure structure.

Description

technical field [0001] The invention relates to the technical field of foundation pit support structures, in particular to a support structure used for supporting reinforced steel sheet piles and core tubes in deep foundation pits. Background technique [0002] The steel sheet pile is a kind of hot-rolled (or cold-formed) section steel with a lock or jaw. After being driven in, the lock or jaw is connected and occluded to form a continuous steel sheet pile enclosure wall, which is used for retaining soil and water. , has the advantages of light weight, high strength, fast construction, environmental protection, beauty, and recyclability. It has a long history of use in construction, municipal, port, railway and other fields at home and abroad. According to the "Foundation Pit Engineering Manual", steel sheet piles are generally It is suitable for foundation pit engineering whose excavation depth is not more than 7 meters and the surrounding environmental protection requireme...

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Problems solved by technology

[0002] The steel sheet pile is a kind of hot-rolled (or cold-formed) section steel with a lock or jaw. After being driven in, the lock or jaw is connected and occluded to form a continuous steel sheet pile enclosure wall, which is used for retaining soil and water. , has the advantages of light weight, high strength, fast construction, environmental protection, beauty, and recyclability. It has a long history of use in construction, municipal, port, railway and other fields at home and abroad. According to the "Foundation Pit Engineering Manual", steel sheet piles are generally It is suitable for foundation pit engineering whose excavation depth is not more than 7 meters and the surrounding environmental protection requirements are not high. For deep foundation pits with a depth of 7 to 12 meters, pile row walls or cement-soil pile walls are generally used as the foundation pit. Retaining structures, although the design and construction technology of these retaining structures are relatively mature, but the construction quality is difficult to control. After the completion of the project, too much reinforced concrete waste is left in the ground, which is not in line with low-carbon economy, green environmental protection, energy saving and emission reduction and sustainable development. The direction of development lays a hidden danger for the future development of China's underground space

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