Horizontal freezing and pipe shed combined subway shield tunnel reinforcing tip and method

Abstract

The invention discloses a horizontal freezing and pipe shed combined subway shield tunnel reinforcing tip and method. The horizontal freezing and pipe shed combined subway shield tunnel reinforcing tip structurally comprises a freezing heavy curtain, a pressure-relief grouting hole, a freezing hole, a temperature measuring hole and a pipe shed, wherein the freezing hole and the temperature measuring hole are formed in the freezing heavy curtain, the pressure-relief grouting hole and the pipe shed are arranged above the freezing heavy curtain, the pressure-relief hole is arranged at the 1,100mm position of the upper portion of the outer circle of the freezing hole, and the pipe shed is arranged at the 1,000mm position of the upper portion of the pressure-relief grouting hole. The method comprises the freeing heavy curtain, the temperature measuring hole, the pressure-relief grouting hole, the pipe shed and specific construction. The horizontal freezing and pipe shed combined subway shield tunnel reinforcing tip has the advantages of being suitable for shield launching reinforcing engineering in urban center where a vertical construction method cannot be carried out due to place limit, guaranteeing the strength and the sealing performance of a reinforcing body, being capable of controlling frost heaving and thaw collapse caused by freezing, guaranteeing protection on sensitive environments, avoiding technical development on existing freezing hole and pipe shed constructing machinery, being convenient to construct and being obvious in environmental-friendly benefit compared with a chemical reinforcing method.

Description

technical field [0001] The present invention relates to a combination of horizontal freezing and pipe shed to strengthen the end of the subway shield entrance and exit hole when the subway shield passes through complex environments (sensitive buildings (structures)) when it departs or arrives. Specifically, it uses It is a method to consolidate the end of the subway shield tunnel with horizontal freezing and pipe shed to ensure the smooth departure or arrival of the shield tunnel and minimize the impact on the buildings (structures) within the departure range. The invention belongs to the technical field of subway shield end reinforcement. Background technique [0002] During the construction of the subway shield method, in order to ensure the smooth departure or arrival of the subway shield and the safety of the buildings (structures) within the influence range, it is usually necessary to reinforce the ends. Its function is to prevent the inflow of groundwater and soil out...

AI Technical Summary

Problems solved by technology

[0005] With the gradual improvement of the urban subway network, more and more complex environments are encountered in subway construction, especially in the city center. It is often encountered that various chemical reinforcement methods cannot be used due to site restrictions, and the freezing method is used for reinforcement due to its frost heave and Melting and sedimentation characteristics, which cannot meet the protection requirements of complex environments

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