Research On Slope Stability Evaluation And Instability Prediction Of Beijing-xinjiang Highway

Highway slope is an important structural structure of highways.Its stability is related to the lives and property safety of the people,especially the mountain road network plays an important role in the network effect and scale effect under adverse seasons.The road construction process in China has been accelerating,the mileage of road networks has been increasing,and the mileage and scale of highway slopes are also constantly expanding,and the traffic safety problems on the highway slopes are also attracting more and more attention.Therefore,the development of highway slope stability evaluation and early warning analysis and research can strengthen the timely control of highway network operation managers on the state of highway slopes,eliminate the safety hazards caused by the instability of highway slopes,and protect the lives and protect the lives and property of the people,and thus achieve safe,efficient and convenient operation of road networks,especially mountain roads.The research content of this paper is as follows:(1)This paper collates the research history and current status of slope stability evaluation methods and instability warnings at home and abroad,and summarizes the background and significance of highway slope stability involved in research work;This paper takes the Jiao-Ni Bay to the Ji-Jin section of Beijing-Xinjiang Expressway as an example,and analyzes the local data by collecting relevant data and field surveying methods.The geological,hydrological,climatic and other natural conditions affecting the stability of the highway slope are analyzed statistically and classified for the common diseases of the slope;(2)Because of difficulty for establishing a suitable and determined mathematical model between slope safety factor and influencing factors,this paper introduces two kinds of mathematical statistics algorithms,namely support vector machine and BP neural network,and the dynamic evaluation model of slope stability of Beijing-Xinjiang Expressway is constructed by the two methods.By means of matlab statistical software and mathematical model,the safety factors of 45 sample case data and 5 Beijing-Xinjiang Expressway engineering slope examples are predicted and calculated,and a more suitable evaluation method of slope type for the project is obtained;(3)This paper introduces the concept of the vertical displacement direction rate of the slope.Aiming at the unique advantage of vertical displacement direction rate,this paper establishes a support vector machine evaluation model which accords with the displacement parameter,and constructs a vertical displacement direction rate instability criterion.By substituting independent monitoring samples of monitoring points into the support vector machine model,the stability state of highway slope is evaluated and judged;(4)According to the characteristics of soil and slope of Jiao-Ni Bay to Jin-Ji section of Beijing-Xinjiang Expressway,combined with the latest highway slope warning technology,and based on the Shanghai Huace Navigation Technology’s development,a real-time monitoring system for the stability of Beijing-Xinjiang Expressway is constructed.The platform has achieved the real-time transmission of road slope displacement and crack change data,realizing real-time monitoring of slope dynamics.