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针对地下连续墙等柔性挡土结构,根据土体的渐进破坏机制,建立了非极限状态下改进的库仑土压力公式,并推导了填土内摩擦角及墙土接触面上外摩擦角的发挥与土体位移的非线性关系。将这一公式运用到改进的弹性抗力法中,得到了一种新的考虑位移的柔性挡墙上土压力计算方法。算例分析表明,模型板上土压力计算值和试验实测值吻合得较好。该计算方法可用于柔性挡墙的设计及验算。
According to the progressive failure mechanism of soil, an improved Coulomb earth pressure formula under non-limit state is established for flexible retaining wall structures such as diaphragm wall. The internal friction angle of soil filling and the external friction angle at wall-soil contact surface are deduced Nonlinear relationship with soil displacement. Applying this formula to the improved elastic resistance method, a new method to calculate the earth pressure on the flexible retaining wall considering the displacement is obtained. The case study shows that the calculated values of soil pressure on the model plate are in good agreement with the experimental values. The calculation method can be used to design and check the flexible retaining wall.