Research On Stability And Reinforcement Principle In Theslop Of Gantong Road

In recent years, with the infusion of newly-built railway and highway in China Western Development, more and more high cut slopes construction were projected. Because of high stratums efflorescence level, thick overlay and fragmental rock configuration in southwestern mountainous area, high cuts lopes engineering design problem is more severe and complex.The rock slope K0+000～K0+510 of Gantong road in Panzhihua, which was formed a total of 9 level of cutting high slope in the process of excavation construction. The slop angle is about 40°, the rock is broken and slot are well developed. Because of the control structure is close to the parallel, the slope stability problem is very outstanding.The slope protection design must put forward on the premise that the type and failure form of slope and is clear, and eco-efficiency is considering comprehensive. In this paper, the article focuses on the 9 level of cutting high slope of Gantong road in Panzhihua, slope stability analysis, failure form of slope and mechanisms of action of frame beam with pre-stressed anchor cables structure will be studied by theory analysis, numerical calculation and finite element simulation. The main works of the thesis can be drawn as follows:Firstly, the domestic and foreign current research state of slope stability analysis, failure types and major influence factors of rock slope is fully investigated. In engineering practice, the circle sliced method, simplified bishop slice method and planar slip surface method which is popularly used in slope stability assessment are listed;Secondly, this paper analyzes and compares the advantages and shortcomings of different slop protection measures. With the basic principles of designing the frame beam with pre-stressed anchor cables structure on our current standard structure analysis and current code, the calculations theory and limit values of those construction parameters are discussed.At last, based on engineering geologic and hydrogeological condition, propose the design method of cutting slope Gantong road in Panzhihua, Sichuan province. The paper presents that stability of slope is made by software of lizheng Geological Structure Designing, and Midas/GTS which is finite element analysis software is adopted and a finite element model is established. The internal force distribution and deformation characteristic of constructing slope are analyzed. Compared with the value of theory, the reliability of its design and calculation theories were verified.In summary, based on upper analysis, the mechanical mechanism and deformation characteristic and design method of the frame beam with pre-stressed anchor cables structure of cutting high slope of Gantong road are analyzed and discussed. A set of calculation theory is put forward are optimized in order to provide references for popularization and application of the structure.