考虑土拱效应的RB模式挡墙主动土压力研究
|
摘要
假定滑裂面倾角为朗肯倾角,滑裂体主应力迹线为抛物线,根据水平微分滑裂体的竖向静力平衡得到绕墙底转动(RB)模式下的墙背法向主动土压力、法向主动土压力合力及其作用点高度的表达式。理论值与试验值对比表明:RB模式墙背主动压力沿墙高呈上小下大的非线性分布形式,且理论值与试验值吻合较好。
Assumed that the inclination of failure surface is Rankine failure angle,and the trajectory of principal stress is a parabolic,and according to vertical static equilibrium of differential level sliding soil,new formulas of the normal active earth pressure under RB mode,the normal active earth force and the height of its application were derived. In addition,the calculated values of active earth pressure under RB mode by proposed method was compared with experimental values,and the comparisons show that the distribution of active earth pressure under RB mode is nonlinear,and is upper smaller and lower larger. And the calculate values is accord with experimental values of active earth pressure under RB mode.
Assumed that the inclination of failure surface is Rankine failure angle,and the trajectory of principal stress is a parabolic,and according to vertical static equilibrium of differential level sliding soil,new formulas of the normal active earth pressure under RB mode,the normal active earth force and the height of its application were derived. In addition,the calculated values of active earth pressure under RB mode by proposed method was compared with experimental values,and the comparisons show that the distribution of active earth pressure under RB mode is nonlinear,and is upper smaller and lower larger. And the calculate values is accord with experimental values of active earth pressure under RB mode.
引文
[1] Yi-Tao Zhou,Qing-Sheng Chen,Fu-Quan Chen,et al. Active earth pressure on translating rigid retaining structures considering soil arching effect[J]. European Journal of Environmental and Civil Engineering,2018,22(08):910-926.
[2]俞缙，周亦涛，蔡燕燕，等．基于土拱效应的刚性挡墙墙后主动土压力[J]．岩土工程学报，2013,35(12):2306-2310.
[3] Paik K H,Salgado R. Estimation of active earth pressure against rigid retaining walls considering arching effects[J]. Geotechnique,2003,53(07):643-653.
[4] Fang,Y. S. and Ishibhishi,I. Static earth pressure with various wall movements[J]. Journal of Geotechnical Engineering,1986,112(03):313-333.
[5]王元战，李蔚，黄长虹．墙体绕基础转动情况下挡土墙主动土压力分布[J]．岩土工程学报，2003,25(02):208-211.
[2]俞缙，周亦涛，蔡燕燕，等．基于土拱效应的刚性挡墙墙后主动土压力[J]．岩土工程学报，2013,35(12):2306-2310.
[3] Paik K H,Salgado R. Estimation of active earth pressure against rigid retaining walls considering arching effects[J]. Geotechnique,2003,53(07):643-653.
[4] Fang,Y. S. and Ishibhishi,I. Static earth pressure with various wall movements[J]. Journal of Geotechnical Engineering,1986,112(03):313-333.
[5]王元战，李蔚，黄长虹．墙体绕基础转动情况下挡土墙主动土压力分布[J]．岩土工程学报，2003,25(02):208-211.