Tunnel Engineering Disease Risk Assessment In The Research And Application Of Elastic Wave Test

With the rapid and rapid development of the national economy,the rapid development of China’s transport infrastructure,especially the construction of highways and railways in full swing,and China’s vast territory,geological terrain conditions vary widely,highway tunnels included in the tunnel is also increasing,After the implementation of the western development strategy in the 21 st century,the highway mileage of the highway in the southwest suddenly increased and the mileage of the tunnel increased rapidly.In the construction of the tunnel,due to the complexity of geological conditions and technical conditions,many times can not be in the early survey and design stage of the hidden geological conditions hidden in the tunnel all detected,which brought the operation of the hidden dangers.In order to minimize the occurrence of engineering diseases and ensure the safety of the tunnel operation process,this paper has carried on the risk assessment to the tunnel engineering disease and the elastic wave detection for the high risk disease.The main contents and achievements are as follows:In order to make better use of the advantages of the two methods,the two methods are combined to form a new evaluation method,namely,fuzzy analytic hierarchy process,which is based on the analysis of AHP and fuzzy comprehensive evaluation method.The method of tunnel assessment of tunnel engineering.In this paper,the Delphi method is used to determine the index of the engineering disease risk assessment system of the tunnel,which avoids the authoritative effect of collocating and stubbornness,which can be easily discussed when discussing the meeting.It can also reunite everyone’s opinions and get comprehensive opinions objectivity.Through the fuzzy level evaluation method,the engineering geological conditions are judged by quantitative and qualitative analysis,and the risk of engineering disease is quantitatively calculated to meet the special nature of geological conditions.In this paper,the fuzzy analytic hierarchy process(AHP)is used to evaluate the tunnel engineering diseases Is a scientific and practical,and can provide reference for the evaluation of tunnel engineering disease.Based on the fuzzy hierarchy evaluation method,the risk of the tunnel engineering disease is evaluated and the final evaluation result is obtained.The comprehensive risk of the tunnel is 3.262,the corresponding risk level is three levels,that is,the medium risk,the most likely project of the tunnel Disease is karst,collapse and landslide occurrence is relatively small,basically no debris flow.According to the results of the risk assessment,the tunnel is most likely to be karst,and the karst is selected to select the appropriate engineering geophysical prospecting method.Compared with the large-scale engineering diseases such as landslide,collapse and debris flow,the extent of karst disease is relatively small.In addition,this work is for the risk assessment and testing of engineering disease before high-speed rail operation.The main engineering geophysical methods for concealed karst exploration are usually resistivity method,electromagnetic wave method and elastic wave method.These methods have advantages in terms of intuition,resolution and reliability.In the tunneling test,The track bed and the track plate and the track plate and the track plate contain a large number of rebar,the resistivity method and the electromagnetic wave method have a greater impact,and the track bed and the track plate laying for the elastic wave detection provides a better construction environment,It is effective to select the elastic wave method to detect concealed karst by studying and analyzing the mechanical properties of karst elasticity.In this paper,seismic wave method and transient Rayleigh wave method are used to detect the elastic wave method.The difficulty of seismic image method is the determination of the optimal offset distance.In this paper,the conventional seismic image method is introduced into the multi-offset seismic image method by selecting the appropriate offset distance,which can not only directly affect the deviation It is also related to the ability to distinguish the seismic anomaly,and to avoid the loss of geological information of the tunnel at the same time,and to further improve the credibility of the exploration results.The combination of multi-offset seismic image method and transient Rayleigh wave method makes full use of the advantages of seismic image method.The transient Rayleigh wave method solves the shortcomings of seismic image method,The image processing and interpretation of the Rayleigh wave in the anomaly of the image method avoids the large amount of unnecessary workload in the transient Rayleigh wave method.Application in the exploration work,can reduce the field and indoor data collection and processing workload,provide a more adequate basis for interpretation,improve the accuracy of geological interpretation.