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《Chinese Journal of Underground Space and Engineering》 2017-03
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Finite Element Analysis of Earth Berm Wxcavation Pit Traits Affect Section Properties

Liu Chang;Sun Pan Pan;Zhao Luwei;Li Wenjie;Department of Civil Engineering,Tianjin University;  
According to the interaction mechanism of earth berm and supporting structures,the influences of earth berm width,height,slope,slope steps,area and other cross-sectional characteristics are calculated and analyzed on the supporting structure displacements and the supporting structure internal forces with the method of finite element analysis.The calculation results show that as the growth of the earth berm width,height and slope,envelope forces and displacements of the supporting structure increases,but the development of these section properties to a certain value,the growth trend of the internal forces and displacements of the supporting structure has gradually stabilized.Earth berm area is a determining factor of the forces and displacements of the supporting structure,when the earth berm area is the same,retaining structure forces and displacements are basically the same after the completion of excavation,but with the growth of time after construction,the aspect ratio determines the development trends of change rate of the envelope displacement and bending moment.Through the analysis of specific project example,the result shows that when earth berm area is the same,slope steps does not affect the force and displacement of earth berm,reasonable slope steps should be chosen based on the degree of difficulty of the construction site.
【Fund】: 国家重点基础研究发展计划(973计划)(2010CB732106);; 天津市科技计划项目(11ZCGYSF00800)
【CateGory Index】: TU753
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