Karst tunnel water outburst and mud outburst overall process gradual dynamic risk assessment method

Abstract

The invention discloses a karst tunnel water outburst and mud outburst overall process gradual dynamic risk assessment method. The method includes the steps that 1, in the tunnel investigation stage, the tunnel address and the hydrogeological information of the surrounding rock near the tunnel are obtained, that is, the hidden danger environment for water outburst of the tunnel is obtained, and the risk states of the geological conditions of all segments of the tunnel are known; 2, the risk rating value is worked out according to an expert evaluation vector and a factor weight vector, and consistency check is conducted; 3, danger factors are introduced to influence factors of risk evaluation, the hidden danger environment and the danger factors are considered comprehensively, water outburst risk evaluation is conducted, and the segment distribution feature with the tunnel water outburst risk is divided; 4. The values of all indexes are corrected in real time in combination with actual field construction so as to achieve dynamic evaluation of the water outburst and mud outburst risks. The purposes of optimizing construction organization design and avoiding medium and large water outburst geological disasters are achieved through dynamic construction risk evaluation and control, and important data are provided for later-period tunnel operation risks, and the method has very wide application prospects.

Description

technical field [0001] The invention relates to a progressive risk dynamic assessment method for the whole process of water and mud inrush in karst tunnels. 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 engineering construction is gradually shifting to the western mountainous area with extremely complex topography and geology. The karst water inrush faced during the construction process is one of the main geological disasters in the construction of tunnels in karst areas. Therefore, for tunnel construction in karst areas The risk assessment of the whole process of water and mud inrush in ...

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Problems solved by technology

[0003] However, domestic research on this aspect is not perfect at present. In the process of risk assessment, the complexity of underground engineering geological conditions is often ignored, and most assessment methods can only give qualitative or semi-quantitative analysis results, and cannot The value of each index is corrected in real time in combination with the actual construction situation on site, so as to realize the dynamic assessment of the risk of water and mud inrush

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