Forming Qualitative Analysis And Reinforcement Of Rockfall Of K400+000～170Bao-Cheng Railway

Collapse is refers to the slope rock mass or soil mass under the effect of gravity, the sudden fall down, piling up in the phenomenon of slope toe. Collapse distribution in our country, especially in the mountainous terrain of road engineering, mining engineering and the construction of water conservancy projects and has great harm.Baoji-Chengdu railway is China’s southwest and northwest regions, the central plains region, north China and northeast areas of traffic artery, since New Year’s day was put into operation in1958, has been responsible for the railway transport in and out of Sichuan30%40%, thus maintain its clear, has important strategic significance and economic significance.Based on Baoji-Chengdu railway K392-K398period of comprehensive geological survey evaluation "project, in the downlink of Baoji-Chengdu railway K400+000-K400170collapse of geological environment, the types, development pattern research, discusses the forming conditions and influencing factors of the collapse, and the collapse of the stability, the motion law is studied. The main work and results were as follows:1.Through the analysis and study of survey data, the form factor complex dangerous rock falling rocks area, finally formed the current state in a variety of external interactions. including earthquake, mined-out area and groundwater is the main cause of instability of rock mass.2. By analyzing the engineering geological conditions along the route, determines the Baoji-Chengdu line k400+000～170collapse collapse buckling mode is slippage and dumping collapse type two kinds.3. Choose the representative section, to determine the potential collapse body geometry boundary and mechanical boundary conditions, and puts forward the calculation parameters, calculate the slip and the dumping of the stability of the collapse.4. Collapse stability evaluation factors and the classification standard is put forward, it is concluded that the membership degree of fuzzy evaluation matrix, and the collapse of the stability is divided into basic stable, unstable, volatile, unstable four grades.5. Flight bounce for the collapse of the body is calculated, the application of RockFall software to simulate the collapse body movement, through the study of the rockfall movement process of the collapse point simulation, motion are obtained.6. Proposes a renovation scheme for preventing research section collapse.