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Identification of Highway Collapse Based on Degree of Seismic Damage

YUAN Jinke,PEI Xiangjun (State Key Laboratory of Geological Hazard Prevention & Geological Environment Protection, Chengdu University of Technology,Chengdu Sichuan 610059,China)  
The geological disaster development along the road in seismic region after earthquake is mainly collapse disaster,not only high frequencies of occurrence,but also large scale and strong destruction.According to the field investigation about the development characteristics of collapse along highway after earthquake,the major influencing factors of collapse identification are chosen and analyzed.Taking dip angel of control structural plane,gradient of geomorphology,characteristics of structural plane,development characteristics of recessed cavity,feature of lithology and assemblages,rockmass structure,degree of seismic damage as the basic indicators of collapse identification,the influence weight of collapse identification and index importance degree are semi-quantitatively analyzed by using AHP based on the interaction relationship among indexes.The collapse discrimination index CDI method for highway collapse identification is put forward,and the identification system of collapse after earthquake is built.The quantitative evaluation of the identification system applied to the hidden trouble area of collapse along highway and the field qualitative analysis is general consistent,which shows that this identification system is an effective and rapid method of collapse after earthquake.
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