Study Of The Recognition Technology For Geological Hazard Of Highway Subgrade

With high-speed development of road construction, geological hazard threaten the security of the people's lives and properties and the normal highway communication running. Combining the research of one subject of western communications science and technological project named subgrade disaster prevention techniques extension and application demonstration, this paper based on existing relevant research results both at home and abroad and experience to recognize the highway geological hazard, through investigation, theoretical analysis and research, sum up the type and characteristic of subgrade geological hazard, summarize the recognition technology for geological hazard of subgrade. The method offer technology reference to prevent and control highway geological hazard in the whole country.First of all, aiming at the subgrade geological disasters this paper gets a extensive collection of relevant literature about both at home and abroad ,then we analysised and sumarised the obtained information. Through research and on-site observation and other means, we analysised the relationship between the nature environment of topography and geomorphology, formation lithology, geological structure, hydrology, vegetation, weather and the formation of Subgrade geological disasters.At the same time, our reseach summarized the mian types and characteristics of subgrade geological disasters.On this basis,we have referenced to the current disaster reseach and the standard rules of highway engineering, sumerized the internal and external characteristics of highway geological disaster variability and abruptness, finally we put forward to principals and methods to identiy the roadbed geological disasters.In the next place, through the reseach on the relationship between the subgrade external morphology , internal structural plane and engineering properties of rock and soil mass and the subgrade geological disasters,we presented subgrade engineering geological structure theory which determine the failure mode and scale of subgrade, it is also a main basis of disaster indentification.Finally, we conbined relevant data analizing inductions, through study in disaster training road sections based on project, integrated technical methods of subgrade geological indentification, which make the potential highway disaster indentification possible. Firstly, based on the subgrade geological structure types, we priniminarly judged the possible subgrade failure mode; then, make use of geology disaster feature, concretely judged the failure mode,thus conform the types of geological disaster; finally, we presented field indentification critetion of disasters.Using empirical methods to valuate distinguishing indexes, transformed the qualitative analysis of subgrade geological disaster hazard indentification to quantitive caculations and established a system of distinguishing indexs,distinguished the hazardrous of disasters. We applied this in the demonstration project of Miaoling landslide indentification and get a good results.