Vertical shaft excavation construction method adopting mode of downhole soil outlet and feeding

Abstract

The invention discloses a vertical shaft excavation construction method adopting a mode of downhole soil outlet and feeding. The vertical shaft excavation construction method comprises the following steps that a vertical shaft hole and a construction channel are constructed in a construction site, and the bottom of the vertical shaft hole is made to communicate with an existing underground space through the construction channel; a vertical shaft is excavated outside the vertical shaft hole from top to bottom; soil masses generated in vertical shaft excavation are made to pass through the vertical shaft hole and the construction channel sequentially and then transported out from an existing vertical shaft arranged in the underground space; and in the vertical shaft excavation process, firstly, the top of the vertical shaft is excavated, an opening locking ring is constructed, then, the vertical shaft continues to be excavated downwards, meanwhile, concrete mixed materials are made to pass through the existing vertical shaft, the underground space and the construction channel sequentially and then transported to the bottom of the vertical shaft hole, and a concrete retaining wall isconstructed for the shaft wall of the excavated part, located below the opening locking ring, of the vertical shaft through a shotcrete anchorage machine arranged at the bottom of the vertical shaft hole. The area of the construction site is decreased greatly, the demolition problem is solved, and the phenomenon of resident disturbance caused by demolition, noise, dust, road occupation and the like is reduced.

Description

technical field [0001] The invention relates to the technical field of shaft excavation construction, in particular to a shaft excavation construction method in which materials are excavated and fed underground. Background technique [0002] With the rapid development of my country's urban subway construction, the planned, long-standing and difficult projects have gradually moved to the stage of history. Among them, the demolition of the construction site is the beginning, the first, and the most difficult problem. The shaft construction of the evacuation exit at the C entrance of the Beijing Subway Art Museum Station is a typical example. [0003] The evacuation shaft is located in the southeast of the intersection of Wusi Street and Wangfujing Street. It has a rectangular open-cut frame structure with an outer dimension of 11.52×5.60m and a depth of 15.61m. [0004] The traditional way is to excavate the shaft and use the excavation method to feed materials from the well...

AI Technical Summary

Problems solved by technology

[0005] The main reasons are: 1) The cost of demolition and relocation in the bustling city is high (250,000 yuan / ㎡), and the project cost cannot be afforded; 2) The narrow construction site cannot arrange soil storage; loaders and transport vehicles cannot be operated; Various machinery and materials cannot be arranged and stacked

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