A time-space hierarchical control method for vertical displacement of stratum in earth pressure balance shield construction

Abstract

The invention discloses a time-space hierarchical control method for the vertical displacement of earth pressure balance shield construction strata, including: (1) the arrangement of measuring points in the monitoring site; (3) Divide the shield gap into excavation gap and shield tail gap, and establish the factors affecting the vertical displacement of the stratum (4) Take corresponding measures according to the fact that the existing structure is located in different affected areas. The present invention organizes and analyzes the displacement data to find out the time-space development law of the vertical displacement of the strata, and proposes a time-space classification system, which can take effective corresponding measures according to the partition position of the existing structure and the different stages of the earth pressure balance shield construction. Control measures to accurately control the vertical displacement of the ground, to achieve safe excavation of the earth pressure balance shield.

Description

technical field [0001] The invention relates to the technical field of underground shield tunneling, in particular to a method for controlling the vertical displacement of stratum vertical displacement in earth pressure balance shield tunneling in a hierarchical manner. Background technique [0002] With the increase in the intensity of urban underground space development and the vigorous development of urban rail transit, there are more and more cases of shield tunnels passing through existing pipelines, subway tunnels, pile foundations, and foundation pits under or sideways. The requirements for construction deformation control are getting higher and higher. [0003] In actual engineering construction, the following problems exist in the monitoring of the vertical displacement of the ground and the division of the affected area during the earth pressure balance shield construction: [0004] (1) At present, the research on the formation deformation law caused by earth pres...

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Problems solved by technology

[0005] (2) A lot of research has been done on the impact of earth pressure balance shield construction on adjacent buildings and structures, but most of them are based on the influence of shield tunneling on the structure of adjacent buildings, and do not fully consider the layered displacement caused by the shield itself

[0006] (3) Relevant research has been carried out on the settlement control technology of earth pressure balance shield tunneling, basically based on the research background of shield tunneling through major risk projects, and most of them first carry out ground reinforcement (or take isolation measures), and then shield tunneling again However, based on the structural characteristics and construction method characteristics of the earth pressure balance shield equipment itself, there are few studies on the settlement analysis and control methods induced by shield tunneling, and further research is needed.

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