考虑土拱效应的挡土墙地震主动土压力静力研究
|
摘要
在Mononobe-Okabe拟静力学理论的基础上,对挡土墙后填土进行应力分析,根据静力平衡求得滑裂面水平倾角。再结合土拱效应原理采用水平层分析法,对处于正常受力状态的填土微元体进行应力分析,并根据静力平衡和力矩平衡建立方程组,从而求得适用范围更广的地震作用下墙后土体的主动土压力、土压力系数、土压力合力作用点位置等的计算公式。利用数值方法分析土内摩擦角、墙土面摩擦角以及水平和竖向地震系数对滑裂角、主动土压力、土压力系数、土压力合力作用点位置的影响,并将计算结果与其他计算方法所得结果以及试验结果进行对比分析。
On the basis of quasi-static theory of Mononobe-Okabe,the angle of sliding surface is obtained according to the static equilibrium after analyzing the stress of the filling behind retaining wall.Considering soil arching effect,the static equilibrium and moment equilibrium equations are then derived from analysis of the stress of microelement of filling layer which is in a normal stress state,using the method of horizontal layer analysis.After that,the formulas of active earth pressure,coefficient of earth pressure and action point of resultant force of filling behind the retaining wall under seismic activity,which are more usable,are respectively obtained.The influences of internal friction angle,wall friction angle,horizontal and vertical seismic coefficients on the angle of sliding surface,active earth pressure,coefficient of earth pressure and action point of resultant force are numerically analyzed.Furthermore,the results obtained by the proposed method are compared with those computed by other methods and experimental observation.
On the basis of quasi-static theory of Mononobe-Okabe,the angle of sliding surface is obtained according to the static equilibrium after analyzing the stress of the filling behind retaining wall.Considering soil arching effect,the static equilibrium and moment equilibrium equations are then derived from analysis of the stress of microelement of filling layer which is in a normal stress state,using the method of horizontal layer analysis.After that,the formulas of active earth pressure,coefficient of earth pressure and action point of resultant force of filling behind the retaining wall under seismic activity,which are more usable,are respectively obtained.The influences of internal friction angle,wall friction angle,horizontal and vertical seismic coefficients on the angle of sliding surface,active earth pressure,coefficient of earth pressure and action point of resultant force are numerically analyzed.Furthermore,the results obtained by the proposed method are compared with those computed by other methods and experimental observation.
引文
[1]OKABE S.General theory of earth pressure and seismic stability ofretaining wall and dam[J].Journal of the Japanese Society of CivilEngineers,1924,10(5):1 277–1 323.
[2]MONONOBE N,MATSUO H.On the determination of earthquakepressure during earthquake[C]//Proceedings of World EngineeringCongress.[S.l.]:[s.n.],1929:177–185.
[3]MORRISON E E,EBELING R M.Limit equilibrium computation ofdynamic passive earth pressure[J].Canadian Geotechnical Journal,1995,32:481–487.
[4]刘忠玉,杨会朋,何盛东.刚性挡土墙地震主动土压力的非线性分布[J].郑州大学学报:工学版,2004,25(2):36–38.(LIU Zhongyu,YANG Huipeng,HE Shengdong.Nonlinear distribution of seismicactive earth pressure on rigid retaining walls[J].Journal of ZhengzhouUniversity:Engineering Science,2004,25(2):36–38.(in Chinese))
[5]王立强,王元战,迟丽华.挡土墙地震土压力及其分布[J].中国港湾建设,2007,(5):1–5.(WANG Liqiang,WANG Yuanzhan,CHILihua.Distribution of seismic soil pressure on a retaining wall[J].China Harbour Engineering,2007,(5):1–5.(in Chinese))
[6]杨剑,高玉峰,程永锋,等.地震条件下倾斜挡土墙被动土压力研究[J].岩土工程学报,2009,31(9):1391–1396.(YANG Jian,GAO Yufeng,CHENG Yongfeng,et al.Passive earth pressure ofinclined retaining walls under seismic condition[J].Chinese Journal ofGeotechnical Engineering,2009,31(9):1 391–1 396.(in Chinese))
[7]卢坤林,杨扬,朱大勇,等.考虑土拱效应的挡土墙地震土压力及其分布[J].水电能源科学,2010,28(5):65–68.(LU Kunlin,YANG Yang,ZHU Dayong,et al.Seismic earth pressure on retainingwall considering soil arching effects and its distribution[J].WaterResources and Power,2010,28(5):65–68.(in Chinese))
[8]茅以升.挡土墙土压力的两个经典理论中的基本问题[J].土木工程学报,1954,5(3):249–282.(MAO Yisheng.Basic problems inclassic theory of earth pressure on retaining wall[J].China CivilEngineering Journal,1954,5(3):249–282.(in Chinese))
[9]章瑞文,徐日庆.土拱效应原理求解挡土墙土压力方法的改进[J].岩土力学,2008,29(4):1057–1060.(ZHANG Ruiwen,XU Riqing.Solution of problem of earth pressure on retaining wall calculated bymethod of soil arching effect[J].Rock and Soil Mechanics,2008,29(4):1 057–1 060.(in Chinese))
[10]TERZAGHI K.Theoretical soil mechanics[M].New York:Wiley.1943:82–83.
[11]KINGSLEY H W.Arch in arching[J].Journal of GeotechnicalEngineering,1989,115(3):415–419.
[12]HANDY R L.The arch in soil arching[J].Journal of GeotechnicalEngineering,1985,111(3):302–318.
[13]李永刚.挡土墙被动土压力研究[J].岩土力学,2003,24(2):273–276.(LI Yonggang.Study of passive earth pressure of retaining wall[J].Rock and Soil Mechanics,2003,24(2):273–276.(in Chinese))
[2]MONONOBE N,MATSUO H.On the determination of earthquakepressure during earthquake[C]//Proceedings of World EngineeringCongress.[S.l.]:[s.n.],1929:177–185.
[3]MORRISON E E,EBELING R M.Limit equilibrium computation ofdynamic passive earth pressure[J].Canadian Geotechnical Journal,1995,32:481–487.
[4]刘忠玉,杨会朋,何盛东.刚性挡土墙地震主动土压力的非线性分布[J].郑州大学学报:工学版,2004,25(2):36–38.(LIU Zhongyu,YANG Huipeng,HE Shengdong.Nonlinear distribution of seismicactive earth pressure on rigid retaining walls[J].Journal of ZhengzhouUniversity:Engineering Science,2004,25(2):36–38.(in Chinese))
[5]王立强,王元战,迟丽华.挡土墙地震土压力及其分布[J].中国港湾建设,2007,(5):1–5.(WANG Liqiang,WANG Yuanzhan,CHILihua.Distribution of seismic soil pressure on a retaining wall[J].China Harbour Engineering,2007,(5):1–5.(in Chinese))
[6]杨剑,高玉峰,程永锋,等.地震条件下倾斜挡土墙被动土压力研究[J].岩土工程学报,2009,31(9):1391–1396.(YANG Jian,GAO Yufeng,CHENG Yongfeng,et al.Passive earth pressure ofinclined retaining walls under seismic condition[J].Chinese Journal ofGeotechnical Engineering,2009,31(9):1 391–1 396.(in Chinese))
[7]卢坤林,杨扬,朱大勇,等.考虑土拱效应的挡土墙地震土压力及其分布[J].水电能源科学,2010,28(5):65–68.(LU Kunlin,YANG Yang,ZHU Dayong,et al.Seismic earth pressure on retainingwall considering soil arching effects and its distribution[J].WaterResources and Power,2010,28(5):65–68.(in Chinese))
[8]茅以升.挡土墙土压力的两个经典理论中的基本问题[J].土木工程学报,1954,5(3):249–282.(MAO Yisheng.Basic problems inclassic theory of earth pressure on retaining wall[J].China CivilEngineering Journal,1954,5(3):249–282.(in Chinese))
[9]章瑞文,徐日庆.土拱效应原理求解挡土墙土压力方法的改进[J].岩土力学,2008,29(4):1057–1060.(ZHANG Ruiwen,XU Riqing.Solution of problem of earth pressure on retaining wall calculated bymethod of soil arching effect[J].Rock and Soil Mechanics,2008,29(4):1 057–1 060.(in Chinese))
[10]TERZAGHI K.Theoretical soil mechanics[M].New York:Wiley.1943:82–83.
[11]KINGSLEY H W.Arch in arching[J].Journal of GeotechnicalEngineering,1989,115(3):415–419.
[12]HANDY R L.The arch in soil arching[J].Journal of GeotechnicalEngineering,1985,111(3):302–318.
[13]李永刚.挡土墙被动土压力研究[J].岩土力学,2003,24(2):273–276.(LI Yonggang.Study of passive earth pressure of retaining wall[J].Rock and Soil Mechanics,2003,24(2):273–276.(in Chinese))
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心