Supporting structure for hanging foot pile of deep foundation pit in stratum with soft upper part and hard lower part and construction method thereof

Abstract

The invention discloses a supporting structure for a hanging foot pile of a deep foundation pit in a stratum with a soft upper part and a hard lower part. The supporting structure comprises an upper half supporting system and a lower half supporting system, wherein the upper half supporting system and the lower half supporting system are arranged in the foundation pit by taking the bottom of the hanging foot pile as a boundary; the upper half supporting system is arranged on the inner wall of the foundation pit; the lower half supporting system is arranged at the lower end of the upper half supporting system; the upper half supporting system comprises the hanging foot pile and a reinforced concrete support; and the lower half supporting system comprises an anchor rod and sprayed concrete.The supporting structure has the advantage of high supporting rigidity. The invention also discloses a construction method for the supporting structure for the hanging foot pile of the deep foundationpit in the stratum with the soft upper part and the hard lower part.

Description

technical field [0001] The invention relates to the field of foundation pit engineering, more specifically, it relates to a support structure of hanging foot piles for deep foundation pits in upper soft and lower hard strata. The invention also relates to a construction method for the supporting structure of the hanging foot pile of the deep foundation pit in the upper soft and lower hard strata. Background technique [0002] During the construction of foundation pit engineering, in order to minimize the interference to the surrounding environment and underground pipelines, vertical excavation is generally used for foundation pit construction. According to the different strata of the project, various support structures such as bored piles, underground diaphragm walls, and engineering piles are often used, which need to be comprehensively judged in combination with economic, technical, construction period, and environmental conditions. [0003] The support structure of bored...

AI Technical Summary

Problems solved by technology

When the foundation pit project encounters the surrounding underground pipelines or buildings (structures) with a relatively short distance and a deep buried depth, if the anchor cable or anchor rod anchor-staying structure is used, it will be limited by the surrounding environment and cannot be arranged. ; In addition, during the excavation of the foundation pit, it is necessary to consider sufficient foundation pit support stiffness in order to minimize the deformation impact on the surrounding environment, so the anchor cable or anchor bolt anchor-staying structure is limited by the small support structure. The rigidity of the protection is weak, and the protection ability to the surrounding environment is weak

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