Study On Risk Assessment And Application Of Tunnel Water Inrush In Long And Large Tunnel Of Guangtong-Dali Railway

In this paper,based on the Guangtong-dali railway expansion project,the geological survey is carried out in the area of Yunnan Guangtong-dali railway,and the evaluation system of tunnel flood risk index is formed by combining the research of multiple tunnel flooding water.In two ways,three high-risk tunnels were flooded out risk assessment,and put forward the prevention and treatment measures.Through the investigation and analysis of the main controlling factors affecting the accident,the evaluation system of the risk index of the tunnel burst water based on the engineering geological conditions and the hydrogeological conditions is constructed through the investigation of the sudden surge water in the tunnel.According to the long-term tunnel geological prediction practice and geological analysis,the use of raw data to quantify the various indicators and to be graded,not only reduces the cost of data collection also ensures the accuracy of the data for the tunnel rush water risk assessment provides data support.The weights of each index are determined by the combination of subjective and objective methods,and the fuzzy mathematics evaluation model is obtained by combining the fuzzy mathematics theory.The TOPSIS method is used to form the comprehensive weight-TOPSIS tunnel flood risk assessment model,and the two evaluation models are applied The results of the evaluation and the actual results are compared with the actual excavation.The advantages and disadvantages of the two methods are analyzed and the risk of the tunnel is increased predictive accuracy.Finally,according to the evaluation method of this paper,the risk level of the tunnel burst water is determined.Through the practice of the three high-risk tunnels in the wide line,the corresponding precaution measures and the treatment measures,Which validates the practicality of these assessment models and can effectively reduce the influence degree of the riot in the cave,and can avoid the risk of the sudden burst of the tunnel,and provide a reliable method for the risk assessment of the sudden water in the long tunnel New way.