Construction method for building ground inlet and outlet type shield tunnel

Abstract

The invention discloses a construction method for building a ground inlet and outlet type shield tunnel. The method comprises but not limited to the following steps in sequence: determining an axis of a tunnel line; arranging a shield initial base and a guide rail on the ground or a shallow buried heading; mounting a shield machine on the guide rail and installing and debugging the shield machine; obliquely pushing a shield into a soil body downwards along the axis of the tunnel line; gradually cutting the soil body through a cutter head; meanwhile, mounting a tunnel lining segment; obliquely pushing the shield out of the soil body upwards along the axis of the tunnel line; entering a shield receiving base which is arranged on the ground or the shallow buried heading in advance; separating the last segment out of the tail of the shield machine to run through a tunnel; arranging waterproof end walls at the end parts of the tunnel in a shield ground initial position and a shield ground receiving position; and covering soil to the waterproof end walls for construction. As the ground shallow buried heading is used instead of a deep and big working well, the engineering construction cost is saved and the building period is reduced. Energy-saving, environment friendly and low carbon building features are implanted to the underground space development field.

Description

technical field [0001] The invention relates to a shield tunnel construction method in the field of engineering construction, in particular to a ground access type shield tunnel construction method in which the shield directly enters and exits from the ground. Background technique [0002] The traditional shield tunnel construction method requires two working shafts as the originating shaft and receiving shaft of the shield tunnel. The shield tunnel starts and arrives in the working shaft, and the approach section of the tunnel needs to be cut open. When the conventional shield method is used for starting and receiving propulsion, it is also necessary to set up covering soil that should not be less than 0.6 times the outer diameter of the shield excavator. The construction of the working well and the open cut of the approach section require a large number of ground construction sites, which has brought about a series of problems such as demolition of the construction site an...

AI Technical Summary

Problems solved by technology

The line from the working well to the ground needs to be constructed with open cut, which requires a large amount of work, a long project period, and high investment

There are also municipal pipelines including tunnels for drainage, water storage, communication, electricity, gas, and common trenches. Working wells are designed and set up as temporary construction structures. After construction, they are covered with soil and backfilled, causing a lot of waste

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