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挡土墙侧向土压力主要取决于墙体位移条件。在考虑土体平面应变简单加载条件下不同方向主应力的大小关系以及砂土剪胀特性的基础上,由砂土渐近状态公式得到挡土墙主动位移土压力区和被动位移土压力区任意墙体位移条件下侧向土压力系数K的计算公式。与已有方法相比,通过引入渐近状态准则,考虑了砂土剪胀特性对土压力大小的影响,计算参数确定方法试简单。通过与模型试验的对比,验证了该公式的合理性。
Lateral earth pressure wall pressure depends mainly on the wall displacement conditions. Based on the relationship between the principal stress in different directions and the dilatancy characteristics of sand under the simple loading condition of plane strain of soil, the active displacement earth pressure zone and the passive displacement earth pressure zone of the retaining wall are obtained by the asymptotic formula of sand soil Calculation formula of lateral earth pressure coefficient K under wall displacement condition. Compared with the existing methods, the influence of the dilatancy of sand on the earth pressure is considered by introducing the asymptotic state criterion. The method of calculating the parameters is simple. By comparing with the model test, the rationality of the formula is verified.