双层散体材料桩复合地基固结解析理论

研究了考虑应力集中效应的双层散体材料桩复合地基固结问题 ,在得到此类双层地基系统正交公式的基础上 ,给出了解析解答 ,并通过编程计算 ,分析了此类地基固结基本性状。研究表明 ,根据本文提出的计算模型 ,桩径比和桩体刚度对地基的固结速率有较大影响 ;分别按孔压和沉降定义的总平均固结度有一定程度差别 ;采用竖井固结理论计算得到的平均固结度较本文理论的计算结果偏小。

Analytical theory for consolidation of double-layered composite ground with granular columns

An analytical theory for consolidation of double layered composite ground with granular columns considering the stress concentration effects is presented, and the orthogonal relation of double layered system of such ground is obtained. A lot of calculations are performed based on the solutions and the corresponding results are introduced diagrammatically, from which the consolidation characteristics of composite ground are investigated and discussed. The geometric parameters and modulus of compressibility of granular column have great influence on the consolidation process. The average consolidation degrees defined by excess pore water pressure and settlement respectively are different to some extent. The consolidation degree calculated by the existent theory is smaller than that calculated by the proposed theory in this paper.