Shield interval tunnel group section dividing method

Abstract

The invention discloses a shield interval tunnel group section dividing method. The method comprises the following steps of (1) performing data analysis and theoretical calculation on the area affected by the tunneling of a shield, establishing a shield tunneling model according to the combined safety risk factor of the shield construction environment and the soil crossing properties of the shield tunnel, and performing experiment and research on the tunneling through the shield tunneling model; (2) dividing the grades of the soil layer of the shield tunnel crossing; (3) dividing the grades of the combined safety risk factors of the shield construction environment; (4) according to the grades of the soil layer of the shield tunnel crossing and the grades of the combined safety risk factors of the shield construction environment, comprehensively setting the applicable shield interval tunnel group sections; (5) according to the different shield interval tunnel group sections, setting relevant equipment, such as shield cutter discs and cutters, and by setting and optimizing the tunneling parameters, such as soil pressure, cutter disc torque, shield pushing force, pushing speed, penetration degree and cutter disc rotation speed, correcting the seepage amount, seepage coefficient and spouting working conditions.

Description

technical field [0001] The invention relates to the technical field of shield tunneling engineering, in particular to a method for dividing tunnel sections in shield tunneling intervals. Background technique [0002] In recent years, due to the characteristics of large capacity, high speed, safety and reliability, the urban subway has gradually developed into the first choice to solve the increasingly tense urban traffic problems. With the gradual deepening of urban subway construction, the subway section will inevitably face various geological conditions, various underground pipelines, and various ground buildings. [0003] During shield tunneling construction, reasonable selection and control of shield tunneling parameters is a necessary measure to effectively reduce and avoid safety risks in shield tunneling construction. Establish shield construction parameter control standards and / or control ranges suitable for different engineering geological conditions, hydrogeologic...

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Problems solved by technology

[0005] In the prior art, the research on the safety risk identification of urban subway projects started relatively late, and there were fewer studies on the constr...

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