【摘要】 采用水平层分析法,得到了地震条件下挡墙后黏性土主动土压力合力和作用点位置、土压力强度分布以及临界破裂角的解析解。公式考虑了水平和垂直地震加速度、挡墙墙背倾角、填料黏聚力和内摩擦角、填料与墙背的黏结力和外摩擦角、均布超载等因素,并分析了这些因素对主动土压力的影响。结果表明,朗肯和库伦理论下的主动土压力公式以及Mononobe-Okabe主动土压力公式与地震条件下的主动土压力公式完全一致。地震条件下的主动土压力强度沿墙高呈非线性分布。水平地震加速度增大了主动土压力,垂直地震加速度使得主动土压力有所减小。更多还原

【Abstract】 Horizontal slices method is adopted to deduce active earth pressure formulas of cohesive soil under seismic condition;and analytical solutions of resultant force of active earth pressure and its application position,distribution of earth pressure and critical rupture angle are obtained.The influential factors of horizontal and vertical seismic accelerations,dip angle of wall back,cohesion and internal friction angle of filler,cohesion and external friction angle between filler and wall back and uniform distributed overloading are considered and analyzed.Results show that active earth pressure formula under seismic condition is the same as that obtained by Rankine theory,Coulomb theory or Mononobe-Okabe theory.The distribution of active earth pressure along wall back is nonlinear.Horizontal seismic acceleration increases active earth pressure while vertical seismic acceleration makes active earth pressure decrease.更多还原