Research On Risk Assessment Of Geological Hazards In The Highway Slope

Based on the investigation on geological hazard of highway slope construction,study on classification of characteristic on different kinds of geological hazard, useanalytic hierarchy process constructing the hazard evaluation system of highway slopeconstruction based on topological theory, simulate and analyze the Tu-dimiao slope. Themain contents summarized as follows:Firstly, according to the factors such as form scale and cause, classify highwaygeologic hazard’s type into six kinds, they are Collapse, the landslide, mud-rock flow,unstable slope, land collapse and ground fissure. Discussed the data collection methodof specific hazard’s type, based on the requirements on data acquisition in theimplementing regulations of “Geological hazard survey and zoning of cities andcounties the basic requirements”.Secongdly, summarize the experience of slope classification and failure mode athome and abroad, discussed the classification of highway slope construction andanalysis its characteristic such as complex geological conditions, short time in formparticulate sludge, poor safety; starting with the slope force state, analysis thecalculation and analysis method of slide force and anti-slide force on linea failuresurface and circular slice method, and water’s effect and failure mechanism on slope areemphatically considered.Thirdly, based on the analysis of the influence factors of geological hazard ofhighway slope construction, the system of hazard evaluation system of highway slopeconstruction is constructed, the quantitative processing of selected risk evaluationindexes is made, analysis the disadvantages of the traditional analytic hierarchy processand methods for weight of risk evaluation indexes calculation are analyzed; discuss theextension theory and its advantage of evaluation, and construct the hazard evaluationsystem of highway slope construction using the extension theory.Fourthly,take Tu-dimiao as example, based on the exploration and data collection,study the engineering geological condition and its characters, analysis the cause oflandslide, evaluate the geological hazard risk using the system of hazard evaluationsystem of highway slope construction, the results show that the land-slide is at relativelyrisk status and is match with practical engineering, which shows that the model is applicability, feasibility and feasibility.Finally, based on the analysis on influence factors of geological hazard of highwayslope construction, simulation analysis the Tu-dimiao land slip using the distinctelement numerical simulation software, the result shows that it is in local unstable state,and need to reinforcement treatment.