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本文从扶壁结构填土的力平衡条件出发,提出了当建筑物后背填土处于主动极限平衡状态或弹性静止状态时作用在各构件(包括立板、肋板、底板)上土压力的理论计算方法。由于肋摩擦的影响,作用在扶壁立板上的土压力与古典的库仑或朗金土压力不同。肋摩擦效应使立板上的水平土压力显著减小,同时底板上的垂直土压力也小于上载压力。土压力强度沿深度的分布是非线性的。对立板和底板的减压效果同肋摩擦的发挥效果以及肋间距的大小有关。从一些模型试验和原体观测资料的验算可知理论计算与实测结果基本相符。以广州黄埔新港钢铁码头为例,当考虑墙摩擦角δ=Ф/3时,立板上的水平土压力可比古典主动土压力约小40％,底板上的垂直土压力可比上载压力约小30％。
In this paper, starting from the force balance conditions of the buttress structure filling, it is proposed that the earth pressure acting on each member (including the vertical plate, ribs, floor) when the backfill of the building is in the active equilibrium equilibrium state or in the elastically stationary state. Theoretical calculation method. Due to the effect of rib friction, the earth pressure acting on the fascia uprights is different from classical Coulomb or Langeuge pressures. The rib friction effect significantly reduces the horizontal earth pressure on the vertical plate, while the vertical earth pressure on the floor is also less than the upload pressure. The distribution of earth pressure intensity along the depth is non-linear. The decompression effect of the counter plate and the bottom plate is related to the effect of the rib friction and the size of the rib spacing. From the verification of some model tests and original observation data, it can be seen that the theoretical calculations are basically consistent with the measured results. Take the Huangpu Xingang Steel Terminal in Guangzhou as an example. When considering the wall friction angle δ = Ф/3, the horizontal earth pressure on the vertical plate can be approximately 40% lower than the classical active earth pressure, and the vertical earth pressure on the bottom plate can be smaller than the upload pressure by approximately 30%. %.