With the continuous development of urbanization in China,there are a large number of binary structure slopes with overburden soil and weathered rock,but there are few studies on the overall stability analysis and support design theory system of such structure slopes.Therefore,taking Jiangshan mountain reinforcement project in Jinan area as the research object,based on the analysis of site construction conditions,slope height and surrounding environment,the composite structure engineering design of pile plate retaining wall+prestressed anchor cable+rock bolt shotcreting was put forward,which successfully solves the problems of soil instability,large deformation of retaining structure and poor safety in construction process of soil rock composite slope in Jinan area.At the same time,combined with the finite element software MIDAS/GTS,the stability of the existing slope was analyzed,and the sliding surface position and failure mechanism of the soil rock binary structure slope were studied from three aspects of stress field,displacement field and overall stability coefficient.The research results show that the overall stability coefficient of the existing slope is 1.22,which belongs to the basic stable state;with the construction conditions,the stress concentration occurs on the weak surface of the underlying limestone,and the engineering scale of the potential slip surface of the slope is effectively restrained with the reinforcement measures;the displacement at the top and foot of the slope gradually decreases,and the maximum displacement is located in the middle of the slope,the displacement value is 14.64mm near the interface;through the slope reinforcement design scheme,the overall stability coefficient of the soil rock binary structure slope is increased to 1.55,which belongs to the stable state and meets the specification requirements.
soil rock binary structurereinforcement designsafety factoroverall stabilitynumerical simulation
NETL
NSTL
万方数据
