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基于库仑土压力理论的假设,挡土墙土压力是由墙后填土在极限平衡状态下出现的滑动楔体产生,对局部三角形滑楔体进行力和力矩平衡分析,建立挡土墙上土压力强度的两个基本微分方程式;比较两式得到了主动土压力分布系数,由此推导了土压力强度和土压力合力作用点高度的理论公式,并分析了填土内摩擦角、墙背摩擦角、填土倾角、墙背倾角和填土表面均布压力对主动土压力强度系数、破裂角和土压力分布的影响,进一步科学地分析了主动土压力在不同因素影响下的非线性分布特性。
Based on the assumption of Coulomb’s earth pressure theory, the earth pressure on the retaining wall is generated by the sliding wedge which occurs under the limit equilibrium state of the backfill wall. The force and moment balance of the local triangular wedge are analyzed to establish the soil The two basic differential equations of pressure intensity are obtained. Comparing the two formulas, the distribution coefficient of active earth pressure is deduced, and the theoretical formula of earth pressure intensity and earth pressure force acting point height is deduced. The internal friction angle, wall back friction Angle, fill angle, dorsal angle and uniform pressure on the surface of earth pressure on the active earth pressure intensity coefficient, fracture angle and earth pressure distribution, and further scientific analysis of the active earth pressure under the influence of different factors under the nonlinear distribution .