A round-arc-section foundation pit lattice truss support system and a construction method thereof

Abstract

The present application relates to the technical field of foundation pit support structure, in particular to a circular-section foundation pit lattice truss support system for replacing the original steel support body in a circular-section foundation pit, comprising four lattice truss supports, which are uniformly installed around the original steel support body support site, each lattice truss support comprising four horizontal upright rods, between which are installed horizontal rods, vertical upright rods and inclined rods, and each lattice truss support being provided with a pressing part at both ends; the pressing part comprising a base plate and an inner pressing block arranged at the center of the base plate, the inner pressing block being movable along the horizontal direction through a compacting assembly; the lattice truss support is provided to replace the original steel support body structure used in the traditional way, solving the problem of frequent construction of steel support in the traditional foundation pit, preventing the occurrence of leakage defects caused by the damage of the circular wall structure due to the installation of pre-buried steel plates and anchor bolts and other structures; the lattice truss support is convenient to disassemble and assemble, can firmly support the two circular side walls without the need for pre-axial force, and is simple and efficient to construct.

Images