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为了提高常用的剩余推力法的精度,通过引入比例因子确定条间力作用倾角,建立同时考虑力平衡和力矩平衡的联立方程组,求得边坡安全系数,并通过算例验证了其可靠性。研究表明:不平衡力矩和边坡安全系数均随着比例因子的变化而接近线性改变;相对于常规不平衡推力法而言,改进法求解安全系数时具有更高的精度和更快的收敛速度;在不考虑水平地震力时,条间力方向与条底滑面基本平行;考虑较大地震力作用时,条间力倾角变化主要集中发生在边坡后部的少数几个条块中。当比例因子为零时,改进不平衡推力法与常规不平衡推力法是一致的,故其可以视作常规法的扩展形式。
In order to improve the accuracy of the commonly used residual thrust method, the slope angle of the bar is determined by introducing the proportional factor, and the simultaneous equations considering both the force balance and the torque balance are established to obtain the slope safety coefficient. The reliability of the slope is verified by an example Sex. The results show that the unbalanced moment and slope safety factor change linearly with the change of scale factor. Compared with the conventional unbalanced thrust method, the improved method has higher accuracy and faster convergence rate when solving the safety factor ; When the horizontal seismic force is not considered, the direction of the inter-strip force is basically parallel to the sliding surface at the bottom of the slope. When considering the effect of large seismic forces, the variation of the inclination angle of the strip mainly occurs in a few blocks at the back of the slope. When the scale factor is zero, the improved imbalance thrust method is consistent with the conventional unbalanced thrust method, so it can be regarded as an extension of the conventional method.