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对于砂井地基的固结计算方法,文献已有过研究,它适用于软土层分布厚度很薄的情况,以致可将士中起始孔隙水压力当作均勻分布(图1a)。但当软土层分布厚度较荷載宽度很为深厚吋,由預压荷载产生的起始孔隙水压力有着随深度逐渐消減的现象(图1b),本文将对此作近似分析。文中采用一般习用的基本假设,卽:土的固结过程符合经典固结方程,不考虑土的蠕动、起始梯度等因素;施荷瞬间,土中孔隙水压力不受偏应力影响;土体应力分布符合弹性理论。
The calculation method for the consolidation of sand drain foundations has been studied in the literature. It is applicable to the case where the thickness of the soft soil layer is very thin, so that the initial pore water pressure can be considered as a uniform distribution (Fig. 1a). However, when the distribution thickness of soft soil is deeper than the width of the load, the initial pore water pressure produced by the preloading will gradually decrease with depth (Fig. 1b). This paper will analyze it approximately. In this paper, the basic assumptions used in general are used. 卽 卽 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土 土The stress distribution conforms to the elasticity theory.