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在水利、港口、道路及桥梁等土木工程设计中经常会遇到挡土建筑物或挡土构件,而作用在这些建筑物或构件上的主要荷载是土压力。因此,在不同条件下如何确定土压力,对挡土构筑物的设计十分重要。根据太沙基等人进行的挡土墙模型试验,墙顶的相对位移与土压力系数之间的关系如图1。图中K为土压力系数,p为墙顶位移(墙被土压力推离土体时为+p,墙被外力推向土体时
Earth-retaining structures or retaining members are often encountered in civil engineering designs such as water conservancy, seaports, roads and bridges, and the main load acting on these structures or components is earth pressure. Therefore, how to determine earth pressure under different conditions is very important for the design of retaining structures. According to the test of the retaining wall model conducted by Taishaji et al., The relationship between the relative displacement of the wall top and the earth pressure coefficient is shown in Fig.1. In the figure, K is the earth pressure coefficient, p is the displacement at the top of the wall (+ p when the wall is pushed away by soil pressure, and when the wall is pushed by the external force to the soil