Study On Slope Stability Of Foundation Pit And The Prevention Measures In Pan Long District Of Kunming City

With China’s rapid economic development and accelerating the process of urbanization, increasing tensions of urban building land, people will not only spatial development aiming toward the ground space, and engineering examples show, people pay more attention to the underground space. With more developed cities, smaller intervals of the adjacent building Foundation pit excavation should not only consider itself stability, and also taking into account the safety of adjacent buildings and crowded in the cities. The stability of Foundation pit and people’s lives and property are at stake. Construction of the subway, underground car parks, underground part of the building and other types of underground space, need to deal with Foundation problems, pit safety issues have been referred to an unprecedented height.Project is located in Renmin East Road extension (ChangShui airport Expressway) and the Northwest corner of the intersection of Wasi road. Proposed construction made up of blocks of a, b and c. Design of basement base elevation is 1955.10m. Combined with the surrounding ground level, Foundation and slope’s height is 7-43.5m. Basement range boundary lines and slope (pit) the contour lines are roughly parallel to the red line with irregular shape, basement perimeter of the border about the scope is 1050.0m. Plane the proposed excavation area is approximately 62871.1m2. After slope stability analysis and calculation of all slopes require support measures in order to meet the design requirements. Design and construction of slope supporting structure is very difficult.In the Foundation pit slope stability, plenty of engineering is at the exploratory stage, Main work as follows:(1) Slope stability analysis for Project calculations.(2) Compare before and after excavation stability of slope supporting structure comparison.(3) Numerical simulation on Foundation pit excavation process simulation.(4) Compared with actual monitoring data, data from that simulation software and actual results differ.Innovation in this paper:In slope excavation depth, foundation rock layer self-stability and overall stability is poor. Compare before and after excavation stability of slope supporting structure comparison. By supporting this research project on the deep pit, to ensure the safe use of support measures for the future deep foundation pit retaining provide some reference.