Study On Monitoring And Early Warning Of A Rocky Slope Landslide In South Shanxi

In the design of route selection,China's practice in the 1990s was to“choice and avoid bad”.However,with the rapid development of high-grade highways,it is extremely unrealistic to continue to use this method.Therefore,high embankments and deep roads These two kinds of highway slopes cannot be avoided in the line selection.The most direct effect of this kind of impact is the more and more artificial slopes on the roadside slopes,especially the rocky slopes.Therefore,the safe operation of highway rock slopes has been placed in an extremely prominent position,and slope monitoring is one of the most important means to predict the instability of the slope and ensure the safe operation of the road.Based on the monitoring of the Yangjiahe landslide,this paper studies the prediction and prediction of landslides.The topographic and geomorphic environment,stratigraphic lithology,geological structure and engineering geological hydrogeological characteristics near the Yangjiahe slope are systematically analyzed.The physical and mechanical indexes of the rock and soil obtained from the previous research data are combined with the existing engineering experience to adjust the parameters.Based on the calculation and analysis of slope stability;on the basis of the preliminary work,the construction monitoring plan based on the surface deformation monitoring of the slope was designed and arranged.Collecting and analyzing the monitoring data,using the interpolation method to preprocess the missing data on the site;through the slope monitoring and early warning research of the system,the slope monitoring and early warning model based on the grey system theory is established,and then the theory and model design and development are proposed.Yangjiahe landslide monitoring and early warning system.The main research results are as follows:?1?According to the structural geological characteristics of the Yangjiahe slope obtained from the on-site investigation and the physico-mechanical calculation indexes obtained from the later research,the conventional slope stability calculation is carried out,and the slope stability is preliminarily evaluated.?2?Interpolation method is used to interpolate the monitoring data missing during the landslide construction monitoring,and provide complete monitoring data for the subsequent deformation analysis and early warning of the Yangjiahe landslide.?3?Based on the grey system theory,the time response function of the GM?1,1?model is established and the accuracy of the model is tested.The rationality of the prediction model is verified by comparing the fitting degree of the measured displacement with the predicted displacement.And find the best modeling data sequence length8)₀=9.?4?The displacement rate angle of the cumulative displacement-time curve,the deformation rate of the slope,and the macroscopic characteristics of the slope are used as the criteria for the instability of the slope.The warning levels are divided into four levels:blue,orange,yellow and red.The Yangjiahe slope is currently in the yellow warning stage.?5?Based on the grey system theory,the highway slope warning system of the Yangjiahe section of the G210 national highway was designed to be used for the preliminary analysis of the basic data,maintenance management information and monitoring data of the Yangjiahe slope,and to realize the monitoring and early warning function.