Analysis was conducted for the slope deformation during the excavation process, and the time-variation and gradual change would be considered as the characteristic of it, namely, the tau-effect. This paper was also take research work on the tau-effect issue from two types of aspects that are the soil physical parameters and the global deformation of soil mass. Based on these known results and obtained data, this paper provides an experience equation and got the related development curves about soil tau-effect. The conclusions of this paper could be used as an important reference for some researchers who conduct the related work.%对路堑边坡体在开挖过程中的变形特征进行了简要分析,认为边坡岩土体的“时变”、“渐变”效应是其变形的主要特点,也即时空效应.从边坡岩土体物理力学参数、岩土体整体变形两个方面人手,对这种时空效应特点进行了分析.在试验和前任工作基础上,提出了符合要求的经验公式,并绘制得到岩土体时空效应的发展变化曲线,所得结论可为相关领域工作人员提供一定的参考.
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