土体水平渗透系数变化的多层砂井地基固结性状分析

郭彪; 龚晓南; 卢萌盟; 李瑛

doi:10.13204/j.gyjz201004020

土体水平渗透系数变化的多层砂井地基固结性状分析

doi: 10.13204/j.gyjz201004020

1.
1. 浙江大学软弱土与环境土工教育部重点实验室,杭州 310058;
2.
2. 中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州 221008

详细信息

作者简介:
郭彪，男，1982年出生，博士研究生。E－mail:gb25891775@163.com

中图分类号: TU463
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- 文章访问数: 98
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- PDF下载量: 69
- 被引次数: 0
出版历程
- 收稿日期: 2009-10-09
- 刊出日期: 2010-04-20

CONSOLIDATION BEHAVIOR ANALYSIS OF MULTI-LAYERED SAND DRAINS FOUNDATION WITH VARYING HORIZONTAL PERMEABILITY COEFFICIENT

1.
1. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering,Zhejiang University,Hangzhou 310058,China;
2.
2. State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining &Technology,Xuzhou 221008,China

摘要

摘要: 在考虑涂抹区土体水平渗透系数3种变化模式即水平渗透系数不变、呈线性变化和呈抛物线变化的情况下，对单面排水和双面排水条件下多层砂井地基的固结问题进行分析，推导出解析解，并对双层砂井地基的固结性状进行分析。结果表明，只有在各层土的压缩模量相同时，成层砂井地基按孔压定义的固结度才等于按变形定义的固结度，否则前者大于后者；当涂抹区水平渗透系数呈抛物线变化时地基固结最快，呈线性变化时次之，不变时最慢；施工扰动范围、程度越大，固结越慢；增大任何一层土的压缩系数，均可加快整个地基中的孔压消散。
- 砂井地基 /
- 固结 /
- 渗透系数 /
- 单面排水 /
- 双面排水
Abstract: The consolidation of multi-layered sand drains foundation under single-drainage condition and doubledrainage condition was analyzed. Three types of variation patterns of the horizontal permeability of soil in the smear zone were considered,including the constant distribution pattern,the linear distribution pattern and the parabolic distribution pattern,and an analytical solution was obtained. The consolidation behavior of?double-layered sand drains foundation was investigated. The results show that the overall average degrees of consolidation of foundation in terms of pore pressure is equal to that in terms of strain only if compression modulus of every layer is equal to each other,otherwise the former is always larger than the later; the consolidation rate is at its maximum for the parabolic distribution pattern and is at its minimum for the constant distribution pattern whereas the?one for the linear distribution pattern is in the middle. The larger the smear zone is,the slower the consolidation rate is; the greater the disturbance magnitude is,the slower the consolidation rate is. Increasing compression modulus of any layer could accelerate the dissipation of pore pressure.
- sand drains foundation /
- consolidation /
- permeability coefficient /
- single-drainage /
- double-drainage

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参考文献(13)

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