Cement soil enclosure wall-precast pile cantilever type combination support

Abstract

The invention relates to a cement soil enclosure wall-precast pile cantilever type combination support. A precast pile is driven in a sleeving manner in a tensile region outside a cement soil stirringpile enclosure wall and the combination support is formed by means of a bonding force between a cement soil stirring pile and the precast pile. A steel tube and a reinforcing steel bar are inserted into the cement soil stirring pile enclosure wall, so that the strength of the cement soil enclosure wall is improved. A concrete crown beam and a coping plate are arranged on the top of the combination support, the reinforcing steel bar of the precast pile is anchored into the crown beam and a joint bar and the steel tube of the cement soil stirring pile are anchored into the coping plate, so thatthe integrity of an enclosure structure is improved. The bottom of a foundation pit is reinforced, so that the stability of the enclosure structure is improved and heave deformation at the bottom ofthe foundation pit is controlled. The cement soil enclosure wall-precast pile cantilever type combination support can be used in a circumstance that the construction conditions of the enclosure structure are limited or a structure (building) needed to be protected exists outside the pit, so that the rigidity of the enclosure structure is improved effectively under a circumstance of not increasingthe width of the enclosure structure, the lateral displacement of the enclosure structure and ground surface settlement outside the pit are reduced, influences of foundation pit excavation to a surrounding environment are reduced, and the engineering construction period is shortened. The cement soil enclosure wall-precast pile cantilever type combination support is good in applicability and socialbenefit.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a cement-soil enclosure wall-prefabricated pile cantilever type combined support. Background technique [0002] A large number of foundation pit support projects are required for new construction (construction) in urban areas, and the construction conditions are often limited, mainly in the following three aspects: (1) The current urban areas generally have regular layouts, compact spaces, and underground pipe networks. Intricate, the construction space is often limited by surrounding structures (buildings) and pipelines, and foundation pits generally do not have the conditions for grading and excavation. (2) During the new construction (construction) period, it is necessary to ensure the normal operation of the surrounding pipelines and structures (buildings), and the displacement of the surrounding structures (buildings) and underground pipelines must be strictly control...

AI Technical Summary

Problems solved by technology

Due to the limitations of the above aspects, there are great challenges in the design and construction of foundation pit support for new structures (buildings), and the design of foundation pit support under soft soil geological conditions is even more difficult

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