A method for evaluating the structural health status of a shield tunnel in soft soil

A health status and technology of shield tunnels, applied in the field of performance evaluation of shield tunnels, can solve the problem that the influence of other indicators cannot be considered effectively, it is not conducive to rapid evaluation of shield tunnels, and it cannot better reflect the monitoring indicators and the structural health of shield tunnels Status mapping relationship and other issues to achieve a reasonable and rapid assessment of the structural health status

Active Publication Date: 2018-12-11
CENT SOUTH UNIV
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Problems solved by technology

[0004] Most of the existing tunnel health evaluation methods determine the health status based on the maximum contribution of the indicators, and cannot effectively consider the influence of other indicators, and the evaluation believes that people are completely rational, which cannot better reflect the monitoring indicators and the he

Method used

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  • A method for evaluating the structural health status of a shield tunnel in soft soil
  • A method for evaluating the structural health status of a shield tunnel in soft soil
  • A method for evaluating the structural health status of a shield tunnel in soft soil

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Embodiment Construction

[0034] Such as figure 1 As shown, it is a schematic flow chart of the soft soil shield tunnel structure health evaluation method of the present invention, in a nutshell, including steps:

[0035] (1) Determine the structural health status evaluation system of the shield tunnel, including the health status level and its possibility distribution;

[0036] (2) Determine the index system and its reference distribution function suitable for the evaluation of the structural health of shield tunnels in soft soil areas;

[0037] (3) Monitor each index and construct the possibility distribution function of the monitoring data of each evaluation index;

[0038] (4) Construct the functional relationship between the reference distribution function of each index and its possibility distribution function;

[0039] (5) Construct profit and loss matrix;

[0040] (6) Calculate the value function;

[0041] (7) Construct weight function;

[0042] (8) The comprehensive prospect value is calc...

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Abstract

A method for evaluating the structural health status of a shield tunnel in soft soil is provided. Combined with the possibility theory, the complex and changeable mapping relationship between monitoring data and shield tunnel structure health status is described, which reflects the influence of human bounded rationality on evaluation results in the evaluation process, and provides more accurate and rapid structural safety evaluation results for a shield tunnel in soft soil. The method comprises the steps: the health status of a shield tunnel and its possible distribution are determined, the index system and reference distribution function of shield tunnel structure health evaluation in soft soil area are determined, indicators are monitored, the possibility distribution function of monitoring data and its mapping function with the index reference distribution function are constructed, a profit and loss matrix is constructed, a value function is calculated, a weighting function is constructed, the comprehensive foreground value is calculated according to the value function and weighting function, and finally, the health status grade of the shield tunnel structure in soft soil is obtained according to the foreground theory.

Description

technical field [0001] The invention relates to the technical field of performance evaluation of shield tunnels, in particular to a method for evaluating the health status of shield tunnel structures in soft soil. Background technique [0002] With the rapid development of China's economy and the acceleration of urbanization, the subway has become an effective means to relieve the huge traffic pressure in the city. In urban underground tunnel engineering, shield method construction is a relatively mature and widely used construction technology at present. Compared with the traditional tunnel construction method, the shield tunneling method can effectively control the surface settlement, and the construction speed is fast, so it has become the first choice for urban underground tunnel engineering. Especially for soft soil areas, the shield method is the only feasible long tunnel construction method at this stage. [0003] As more and more subway shield tunnels are put into ...

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/08
CPCG06Q10/06393G06Q50/08
Inventor 付鹤林黄震黄宏伟
Owner CENT SOUTH UNIV
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