考虑第二破裂面的折线墙背挡土墙的地震主动土压力

Seismic active earth pressure on retaining walls with a broken-line backsurface by considering the second failure surface of backfill

应用极限平衡原理和库伦土压力思想,研究地震荷载作用下折线墙背挡土墙的主动土压力问题.采用拟动力法对地震荷载进行描述,考虑地震荷载作用下第二破裂面的产生条件,推导折线墙背挡土墙的地震主动土压力计算公式.通过算例分析各参数对折线墙背挡土墙的地震主动土压力的影响,预测墙后填土滑裂面的位置.

Based on Coulomb's earth pressure theory,the active earth pressure was studied in the framework of the limit equilibrium theory subjected to earthquake.The multivariate function to calculation seismic active earth pressure via taking account of the occurrence of the second fracture surface condition was established and optimized by a mathematical method using the pseudo-dynamic approach.The example was studied for influences of various parameters on seismic active earth pressure and this can be used to determine the potential sliding surface.