Numerical Study: Influences of Local Radial Consolidation for Soft Clay

Numerical Study: Influences of Local Radial Consolidation for Soft Clay
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数值研究:局部径向固结对软粘土的影响

DOI:
10.1007/s11204-019-09584-9
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发表时间:
2019-07
影响因子:
0.8
通讯作者:
Xu Fang
Xu Fang
中科院分区:
工程技术4区
文献类型:
--
作者:
Zhou Yang;Khoteja Dibangar;Xu Fang

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采用单胞模型,通过有限元分析,研究了等垂直应变条件下预制竖井周围局部固结引起的渗透率降低行为。采用泰勒方程考虑了渗透率随孔隙率的变化。有限元分析结果表明,在固结初期,软粘土的孔周渗透率与排水沟附近渗透率之比约为8。此外,我们还比较了有限元计算结果与Hansbo径向固结分析结果之间的平均固结度。这表明,如果不考虑局部固结的影响,解析解将高估固结速率。
The permeability reduction behavior induced by local consolidation around a prefabricated vertical drain under equal vertical strain condition was investigated by finite element analysis (FEA) using a unit cell model. Taylor's equation was employed to consider the variation of permeability with the void ratio. The results of FEA indicate that at the early stage of consolidation, the ratio of permeability at the cell periphery and adjacent to the drain is about 8 for soft clay. Further, we compared the average degree of consolidation between the results of FEA and the analytical results from Hansbo's solution for radial consolidation. This showed that, without considering the influences of local consolidation, the analytical solution will overestimate the rate of consolidation.
DOI: 10.1061/(asce)0733-9410(1988)114:5(614
发表时间: 1988-05
期刊: Journal of Geotechnical Engineering
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