| With the rapid development of economy,human activities are growing,the degree of interaction between human and environment ultimately leads to the frequent occurrence of geological disasters.The highway construction in mountainous area will change the original natural ecological environment,And to induce new geological disasters.It poses a great threat to the residents along the highway.therefore,in the early stage of highway construction in mountainous areas,comprehensive evaluation was made on geological hazards and corresponding prevention and control measures were put forward.,it is very important and necessary.This paper research is based on longchuan to the peaceful highway project,The characteristics of typical geological hazards in mountain roads.Based on the results of research and work experience and detailed research,through analyzing the forming causes and influence factors of geological disasters,to determine the risk assessment index system of highway geological hazards in the study area,Using layers of analytical methods to study the distribution of index weights,Using multi-layered FUZZY evaluation methods to study the risk assessment of geological disasters,Finally based on the principles of different geological hazards prevention and control of targeted research measures to prevent and control of geological disasters in this area.Get the following research conclusion:(1)The main types of geological disaster development in the research area are collapse and landslide.Survey found that the collapse 31 case,landslide 4 case.(2)double-layer geologic disaster danger evaluation index system is established.select the topography,terrain elevation,formation lithology,corrosion development,fracture structure,maximum rainfall of 24 h,earthquake intensity,vegetation coverage,human engineering activities,current scale of the disaster and current geological disaster density as the first layer factors,disaster inducing factor,geological disaster development status as the firsecond layer factors,The weight of each level index is determined by the analytic hierarchy process.(3)Divide the research into 225 basic units,Based on the criteria of risk assessment(low dangerous,midium dangerous and high dangerous),the risk assessment of geologicalhazard was carried out by using the comprehensive evaluation method of fuzzy mathematics,and the tertiary risk division of the research area was further carried out.The low dangerous area(?)is 52.68km2,accounting for 93.98% of the total research area.The high dangerous area(?)is 3.37km2,accounting for 6.02% of the total research area.(4)Through the analysis and research,in the process of engineering construction may cause the geological disasters are mainly karst ground collapse,landslide and collapse,according to the different characteristics of various geological disasters,puts forward the corresponding prevention measures,to ensure the project smoothly. |
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