Supporting structure of foundation pit based on piles in row and internal supports and construction method thereof

Abstract

The invention discloses a supporting structure of a foundation pit based on piles in row and internal supports and a construction method thereof. The supporting structure comprises a plurality of pre-stressed concrete pipe piles vertically and parallelly arranged around the foundation pit, wherein the pile tops of the two adjacent pre-stressed concrete pipe piles are connected through crown beams;first supporting plates are fixed in the tops of the pre-stressed concrete pipe piles in the radial direction, a plurality of main steel bars are fixed on the first supporting plates through fill core concrete, all the main steel bars are arranged in a uniform circle around the inner walls of the pre-stressed concrete pipe piles, and the main steel bars are connected into a whole through stirrups; and internal supports are erected on the bottom of the foundation pit through a plurality of upright posts, and the internal supports are fixed to the crown beams around the foundation pit. The supporting structure can meet the stability requirement of foundation pit deformation in the case of reducing building energy consumption and the use of building materials, the construction dose not influence existing buildings around, the noise and pollution to the environment produced by construction machinery are very little, and construction is green and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a foundation pit support structure and a construction method based on row piles and internal supports. Background technique [0002] In foundation pit support engineering, the most common support structures include soil nail support, cast-in-situ pile + anchor cable support, underground diaphragm wall support, etc. When cast-in-place row piles are used for support, the quality of the piles is difficult to control, the bearing capacity of the pile body is low, and it is not easy to fully exert its own strength. Moreover, the maintenance time of cast-in-situ piles is long, which affects the construction progress. When cast-in-situ piles + anchor cables or soil nails are used for support, it will have a great impact on the surrounding existing buildings and existing underground pipelines, and the foundation pit support in the urban center area close to ...

AI Technical Summary

Problems solved by technology

When cast-in-place piles are used for support, the pile quality is not easy to control, the bearing capacity of the pile body is low, and it is not easy to give full play to its own strength

And the maintenance time of cast-in-situ piles is long, which affects the construction progress

When cast-in-situ piles + anchor cables or soil nails are used for support, it will have a great impact on the surrounding existing buildings and existing underground pipelines, and the foundation pit support in the urban center area close to the existing buildings is not very practical

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