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基于塑性极限分析理论,假设土体的破坏为旋转破坏,推导了绕墙顶转动模式下挡土墙主动土压力公式。通过算例计算,并与规范法计算结果、实测值进行对比,结果表明:论文中计算结果与实测值吻合较好,说明论文的方法合理有效;采用论文中方法计算,满足θ0=θh时的结果与规范法计算结果完全一致,说明传统库伦理论是论文方法的一个特例;RT模式下采用论文方法进行土压力计算得到的结果比规范法的更合理。
Based on the plastic limit analysis theory, assuming that the failure of the soil is rotational failure, the formula of active earth pressure on the retaining wall around the top of the wall is deduced. The results show that: the calculated results in the paper are in good agreement with the measured values, which shows that the method of the thesis is reasonable and effective; and the method in the paper is used to calculate the value of θ0 = θh The results are in good agreement with the results from the normative method, which shows that the traditional Coulomb theory is a special case of the essay method. The earth pressure calculation using the essay method under RT mode is more reasonable than the canonical method.