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With the construction of the Western Highway Traffic rapid development along the highway geological disasters often threaten people's lives and property safety and road traffic normal operations. State Road 316 is located in the southern Shaanxi Qinling Mountains, complex geological conditions, geological disasters, residents along on the highway and causing a serious threat. In this context, this paper surveys Southern Highway in the actual situation of geological disasters, geological disasters analysis PREGNANT road conditions and slope deformation and failure mode, based on the GIS-based technology to build a highway geological disasters database, and conducted within the study area highway geological hazard assessment study on the prevention and control of geological disasters road has important theoretical significance and practical engineering significance. Firstly, to collect the relevant data and field survey, based on a Southern State Road 316 (morning sun - Sichuan River) highway as the focus of the study area, a comprehensive analysis of geological disasters in the study area PREGNANT conditions and slope deformation and failure mode, got the following understanding: (a) study the occurrence and development sections of major geological disasters in the region controlled by topography, rock and soil characteristics, geological structure and the new tectonic movement, rainfall, groundwater characteristics and human factors engineering activities: (2 ) research and development section of landslides, avalanches, landslides and dangerous slopes and other four geological disasters, has the following distribution: topography and tectonic development of geological disasters are closely related, the relative concentration, mass, periodicity, etc.; (3) study sections, there are six major geological disasters slope deformation and failure modes are: bedding sliding failure, creep - pull fission-shaped damage, bend - rip - shearing failure, rotary sliding - tensile failure, wedge sliding failure, along the bedrock surface accumulation layer sliding failure mode and slope deformation and failure of disasters is often a combination of a variety of modes. It also established a research based on GIS technology road along the highway geological disasters spatial databases, and on this basis, fuzzy comprehensive evaluation model for the area along the highway made geological disasters Risk zoning evaluation. The following results were obtained: (1) Based on GIS technology, the use of geological disaster spatial database system, the establishment of the research section of highway geological disasters database systems and database applications to achieve the study area highway geological disasters interactive query management purposes; (2 ) applied AHP to determine the various participating index weights: (3) application of fuzzy comprehensive evaluation model combined with GIS technology, the study of geological disasters were risk zoning evaluation, and achieved more satisfactory results: (4) summarizes the research sections of the basic characteristics of geological hazards, geological disaster prevention for the road has played a guiding role.
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