摘要
本文提出了应用拉普拉斯积分变换、初参数法以及矩阵法来求解多层地基的一维固结问题,得到了任意多层地基的通用解法。对于双层地基,给出了汁算固结度的公式,并举出算例,与有限差分法结果作了比较,十分接近。通过训计算发现习惯采用的加权平均固结系数法会导致较大的误羞。最后,对于未贯穿的砂井地基,建议先对砂井范围地基的三维固结计算一维化,求出等效的竖向固结系数,然后同砂井以下地基一起按双层地基一维固结理论进行计算,从而化较合理地解决了双层地基接触面上孔隙水压力的连续性问题。
In this paper, Laplace transformation, initial parameter and matrix method are used to solve one-dimensional consolidation problems of layered systems and general representative solution has been Obtained. For double layer's subsoil calculation formulae are presented. A numerical example is given which approximately agrees with results from finite difference method. From numerical calculation it is shown that the method using a weighted average consolidation coefficient will result in significant error. For sand-drained subsoil, when the sand-drains do not penetrate through the whole soft soil, it is suggested that an equivalent consolidation coefficient may be obtained by means of transforming the three-dimensional consolidation problem into one-dimensional, then calculation is made according to one-diensional consolidation of double layers, so that the continuity problem of pore pressure on the interface between double layers may be solved rather rationally.
出处
《水利水运工程学报》
1984年第2期18-30,共13页
Hydro-Science and Engineering
