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假定有限填土为单滑块或双滑块破坏模式,引入上限法和Mononobe-Okabe拟静力法,考虑地震与超载共同作用,推导得到了墙背倾斜粗糙、填土面倾斜时有限填土主动土压力上限解。通过与已有室内模型试验结果对比,验证了本文方法的合理性。同时,算例分析表明:有限填土挡墙上的主动土压力强度呈非线性分布;当有限填土宽度小于满足半无限体假设的临界值时,其主动土压力值小于库仑解,且填土宽度越窄二者差值越大;有限填土主动土压力随水平地震系数k和填土面上超载q的增大而增大,但滑裂面倾角随k的增大而减小,随q的增大而增大。
Assuming that the finite filling is single or double slide failure mode, the upper bound method and the Mononobe-Okabe quasi-static method are introduced. Considering the interaction between earthquakes and overloading, the finite backfill of the back wall is derived. Active earth pressure ceiling solution. Compared with the existing indoor model test results, the rationality of this method is verified. At the same time, the case study shows that the active earth pressure on the finite earth retaining wall shows a non-linear distribution. When the finite earth fill width is less than the critical value that satisfies the semi-infinite body assumption, the active earth pressure is less than the Coulomb’s solution The more the width of soil is narrower, the greater the difference between them is. The active earth pressure of finite earth fill increases with the increase of horizontal seismic coefficient k and overloading q, but the dip of slip plane decreases with the increase of k, With the increase of q increases.