Construction method for internal support foundation pit earthwork transportation ramp

Abstract

The invention relates to the technical field of earthwork outlet ramps, and discloses a construction method for an internal support foundation pit earthwork transportation ramp. The construction method includes the following steps that a foundation pit supporting structure is arranged in a foundation pit in advance, a plurality of vertically arranged supporting columns are built in the foundationpit, the bottom of each supporting column is inserted into the soil layer at the bottom of the foundation pit, the upper part of each supporting column is arranged in the foundation pit in a vacant manner, and the supporting columns are arranged around the edge of the foundation pit supporting structure and enclosed to form the arc-shaped transportation ramp; after the construction of the supporting columns is finished, first-layer earthwork excavation is carried out, and after earthwork is excavated to the bottom elevation of a first supporting beam, and the first supporting beam is constructed between the two rows of supporting columns which are oppositely arranged; a ramp beam is constructed at the top of the supporting columns; a support body used for supporting transport earthwork vehicles is constructed; and after the construction of the ramp beam and the support body is completed, the earthwork excavation and the construction of the supporting beam, the ramp beam and the multi-section support body are repeated until an earthwork vehicle can descend to the bottom of the foundation pit to carry out earthwork excavation transportation.

Description

Technical field [0001] The patent of the present invention relates to the technical field of excavated ramps, specifically, to a construction method of an internally supported foundation pit earth transportation ramp. Background technique [0002] As the pace of urbanization in China is gradually accelerating, the utilization rate of land resources is also increasing. In order to better save urban land, more and more urban underground spaces are being developed, which is mainly reflected in the increasing area of ​​buildings. Larger and deeper foundation pits; the surrounding environment of foundation pits is becoming more and more complex (surrounding high-rise buildings, urban comprehensive pipe corridors, subways, etc.), and the requirements for structural deformation of foundation pits are getting higher and higher. Therefore, a large number of deep foundations The pit adopts an internal support structure, which brings new problems to the construction of the project, especial...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a construction method for the earthwork transportation ramp of the inner support foundation pit, aiming to solve the problem of low excavation efficiency in the exit ramp in the prior art

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