Earth pressure balance shield mud cake risk evaluation method

Abstract

The invention discloses an earth pressure balance shield mud cake formation risk evaluation method, which comprises the steps of 1, determining mud cake formation risk influence factors based on earth pressure balance shield construction historical data; 2, establishing a mud cake risk analysis model according to an analytic hierarchy process; 3, establishing a risk analysis grading scoring standard corresponding to the mud cake formation risk analysis model; 4, determining the weight of each risk influence factor in the mud cake risk analysis model according to the analytic hierarchy process; and 5, based on current data of earth pressure balance shield construction, determining a current mud cake formation risk grade according to each risk influence factor score and the corresponding weight in the mud cake formation risk analysis model. Shield mud cake early warning can be carried out according to actual construction conditions, constructors are allowed to take corresponding measures before early warning nodes, the effect of reducing the shield mud cake possibility is achieved, the shield tunneling efficiency is improved, and the engineering cost is reduced.

Description

technical field [0001] The invention relates to the technical field of shield tunnel construction, in particular to an earth pressure balance shield mud cake risk assessment method. Background technique [0002] With the continuous acceleration of urbanization in our country, the available space on the ground is gradually decreasing. The development and utilization of underground space as an efficient means to relieve the pressure of ground traffic is an inevitable trend of urban development. Under the background of vigorously advocating energy conservation and emission reduction in my country, the development of urban rail transit has been vigorously promoted. The subway has become the preferred solution for public travel due to its convenience, speed, and green advantages. As of the end of 2019, a total of 6,730.27 kilometers of urban rail transit lines have been opened in mainland China, including 5,187.02 kilometers of subway lines; as of May 1, 2020, a total of 47 citie...

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Problems solved by technology

[0004] The present invention intends to provide an earth pressure balance shield mud cake risk assessment method to solve the problem that most of the existing technologies focus on the summary of a certain engineering experience and lack specific mechanism analysis and risk analysis evaluation indicators in the process of mud cake formation. Not comprehensive enough, not universally applicable

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