| With the continuous development of national economic construction,the main roads of cities is not only a transportation,is also the important platform of orderly and stable safeguard people's life.So the roads has become the most important works of keep unimpeded,along the roads slope stability evaluation and management work will be a long time the focus of the work in the future.This paper is based on the landslide treatment of G108 national road K120+600 in Beijing fangshan district,and researched on evaluation method and treatment measures of rock slope stability.The emphasis of this paper is whether the landslide will affect the subgrade after the landslide,whether it will continue sliding,and select the most effective treatment scheme,which can provide reference for similar treatment projects.The main research work and achievements are as follows:?1?Through field investigation,the topography,formation lithology,geological structure,hydrogeological conditions and unfavorable geological development of the landslide area in K120+600 are analyzed.The stability of the slope is judged by stereographic projection method,and the degree of fragmentation of the slope rock is determined by using GPR technology.?2?The basic parameters of rock?cohesive strength,internal friction angle,the limit cohesional strength,etc.?are obtained by field engineering geological investigation,point load test and laboratory soil tests.?3?FLAC3D software is used to simulate the slope,researching the overall stability of the slope under various working conditions.The stability state of the rock mass is evaluated,which provides the basis for the design of the slope control.?4?The monitoring points are arranged on the side slope and the adjacent road,carrying out field monitoring work in slope,observed the displacement change after landslide,combined with the numerical simulation and field monitoring results,a comprehensive treatment scheme of lattice beam and prestressed anchor cable is put forward. |
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