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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。
Using horizontal analytic method, the analytic solution of active earth pressure force and action point location, earth pressure intensity distribution and critical fracture angle under seismic condition is obtained. The formula takes into account factors such as horizontal and vertical seismic acceleration, back wall retaining wall angle, packing cohesion and internal friction angle, filler and wall back adhesion and external friction angle, uniform overloading and other factors, and analyzes these factors on active soil The impact of stress. The results show that the active earth pressure formula under Rankine and Coulomb’s theory and the formula of active earth pressure at Mononobe-Okabe are exactly the same as those under earthquakes. Active earth pressure intensity under seismic conditions is nonlinearly distributed along the wall. The horizontal earthquakes increase the active earth pressure and the vertical earthquakes make the active earth pressure decrease.