Evaluation method of geological disaster risk attribute interval of tunnel and underground construction

Abstract

The invention discloses an evaluation method of a geological disaster risk attribute interval of a tunnel and underground construction. The evaluation method comprises the following evaluation steps: (1) establishing a risk evaluation index system and a grading standard thereof; (2) constructing a single-index attribute measure function of the evaluation index; (3) determining a weight vector of a risk interval evaluation index; (4) determining a measurement value interval of the evaluation index, and calculating a single-index attribute measure value of the measurement value interval; and (5) according to a synthesized attribute, measuring a vector, and carrying out attribute recognition by adopting a confidence criterion. The complexity of tunnel and underground construction geological conditions and risk uncertainty are effectively considered, disaster risk levels in the tunnel and underground construction can be determined, and the probability of occurrence of each risk level of construction disasters can be given so as to better realize the quantitative evaluation of the construction disasters.

Description

technical field [0001] The invention relates to a method for evaluating risk attributes intervals of geological disasters in tunnels and underground engineering. Background technique [0002] Tunnel and underground engineering involves traffic engineering (railways, highway tunnels), water conservancy and hydropower engineering (water tunnels, underground powerhouses) and other important engineering fields, and has gradually become an important part of the country's major infrastructure projects. According to the planning of strategic technological development such as "Five", the focus of major project construction is gradually shifting to the western mountainous areas with extremely complex topography and geology. During the construction process, it is faced with "large buried depth, long tunnel line, high stress, strong karst, high water pressure" In addition, it is difficult to find out the engineering geological and hydrogeological conditions along the tunnel in the geol...

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Problems solved by technology

[0004] However, the current research on the risks of tunnels and underground engineering projects is not perfect, and basically stays at the stage of qualitative analysis or semi-quantitative analysis, and still needs a lot of work

There is a common problem in the current risk assessment theories and methods: in the process of risk analysis of tunnel and underground engineering disasters, the value of the risk assessment index is often an exact value, ignoring the complexity and risk of underground engineering geological conditions. In addition, most models can only give the disaster risk level qualitatively or semi-quantitatively, but cannot give the probability of occurrence corresponding to the disaster level

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