Research And Application In Displacement Monitoring Of Soil Slope Based On The Perspective Of Grey Theory

Slope system and grey system and are considered to belong to the grey category,so this paper mainly uses the grey system theory to research some questions about soil slope deformation monitoring.The paper details introduces the grey system theory’s two core content: GM(1,1)and grey correlation analysis method from the three aspects which are theoretical basis,modeling steps and calculation method.After consulting plenty of related literature,this paper aims at deficiencies in their application of slope project to make some improvements.Taking the displacement monitoring data of Hangxinjing highway in Zhejiang Province as original data.This paper first adopts linear interpolation method to correct the monitoring data which have some error,then respectively uses the monitoring data of surface displacement and deep displacement data set up two kinds of grey models to forecast.One is a kind of traditional GM(1,1);The other is a metabolism model which is constantly remove the old data then add the new data.Comparing forecast precision from the two models in the short-term and long-term forecast of different kinds of displacement.Taking five soil slopes of Hangxinjing highway which have clear research conclusion and specific physical and mechanical parameters as example,this paper adopts grey correlation analysis method and grey relation projection method which is corrected to make stability analysis and try to find their relative value of stability;Considering some slope which can reflect typical geology of this project as the basic data,then this paper analyzes the importance of the sensitive factor of the slope by grey correlation analysis method.Research results show that:(1)In medium and long term forecast,the improved metabolism model can achieve higher prediction accuracy,the predicted results are more close to the measured values.(2)The degree of soil slope stability calculated from grey relation projection method in accordance with their safety factor which is calculated by limit equilibrium method,it proved that this method always completely feasible in engineering.(3)This paper calculate the importance of the sensitive factor of slope though grey correlation analysis method,the results are in complete accord with the expert’s conclusion,so the results can offer help for practical engineering.