Stability Analysis Of Crushed Rock Slope On K103 Slope Of Hang-Jin-Qu Expressway

Crush rock slope is one common form of landslides and distributed widely in our country, thus a systematic and rounded stability analysis of such slopes is of great practical significance. In this thesis a systematic and complete analysis is conducted combined with the K103 landslide of Hang-Jin-Qu expressway in Zhejiang Province and its main contents are as follows:1. Based on the existing data and documents, a field preliminary prospecting is conducted, and various unfavorable factors which influence the slope stability are concluded. Aimed at this project, the causes of engineering disasters are analyzed and both of the developmental law and mechanical mechanism of slope destabilization are discussed.2. The slope stability analysis method which is based on the finite element strength reduction method is studied on in details, the analysis procedures of slope destabilization by the finite element method is completely analyzed, and the processing method for the failure plane of crush rock slopes was chiefly analyzed.3. A finite element model based on the K103 landslide is established, various simulation modes of the sliding zone are adopted. Then the analysis results are comPared with each other, the changing tendency of stresses, strains and plastic zones of the sliding zone in the process of slope safety to failure is analyzed by the finite element strength reduction method and the adaptability of the concentration analysis method in the crush rock landslide was expounded.4. The theory of the limiting equilibrium method which is commonly used today is reviewed, the geotechnical analysis software Geo-studio is adopted, and then both advantages and disadvantages of different methods in analyzing the crush rock slope stability are concluded provided that the influence of a known sliding zone is considered. The inbalanced thrust force method which is commonly used in our country is also reviewed, then the residual glide force of the slope is calculated by three methods, namely, the traditional residual glide force method, the residual glide force method by considering different degrees of strength display of failure plane, and the residual force method combined with the finite element method, and finally the conclusion that the latter two methods are suitable for crush rock landslide study is drawn.