Research On Highway Slope Stability Based On Factor Analysis And Grey-fuzzy Theory

The topographic conditions in China are complicated,so the construction and management of highway projects are different.With the improvement of road network in our country,the total mileage of road also increases greatly.Most highway projects will accompanied by the different degree of slope stability.It’s hard to determine the degree.So the slope stability will happens if slope reinforcement and other preventive measures are not timely and effectively taken.Therefore,the stability of highway slope has become a key issue to be explored and studied by scholars in the transportation industry.In this paper,by means of literature survey,questionnaire survey and field investigation,on the basis of analyzing,summarizing and analyzing slope instability cases,geographical and geomorphic characteristics,hydrometeorological characteristics,geological environment characteristics and other factors are selected as the secondary indexes for slope stability evaluation and analysis.In the selection of the slope stability analysis index,following the scientific principle of the index selection,the t-test and variance test are adopted to select the principle that has the greatest impact on the slope stability and meets the operability as the first-level index system of the evaluation,so as to make the follow-up evaluation more reasonable and accurate.In data processing,using factor analysis theory,the less common factor of linear function and specific factor to express the sum variables,to achieve a reasonable explanation variables correlation and selection,the purpose of correlation analysis and then using the factor analysis method to empowerment of the indicators of slope,corresponding theoretical prepare for subsequent modeling.The grey-fuzzy evaluation model is obtained by using the gray correlation coefficient method to whiten the horizontal correlation of all indexes.Finally using factor analysis and the combination of gray fuzzy theory analysis method to evaluate the slope stability analysis,quantitative specific evaluation of slope stability is given,in order to verify the correctness of evaluation results,use a simplified Bishop method to verify this factor-gray fuzzy theory model analysis,the verification results show that the factor analysis of grey fuzzy model is feasible.It provides the stability analysis basis and theoretical support for highway engineering slope managers,and then takes effective and rapid reinforcement measures to strengthen and treat the slope.Combined with factor analysis,grey correlation analysis and fuzzy comprehensive evaluation theory,a grey-fuzzy analysis model of highway slope stability is established.The evaluation model is applied to an engineering example,and the calculation results show its feasibility and applicability.It also provides theoretical support and reference for studies on the stability of highway slope and slope reinforcement and protection.