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初始孔压非均布考虑起始比降的一维固结解

王坤, 谢康和, 刘兴旺, 李传勋, 邓岳保

王坤, 谢康和, 刘兴旺, 李传勋, 邓岳保. 初始孔压非均布考虑起始比降的一维固结解[J]. 岩土工程学报, 2011, 33(9): 1419-1424.
引用本文: 王坤, 谢康和, 刘兴旺, 李传勋, 邓岳保. 初始孔压非均布考虑起始比降的一维固结解[J]. 岩土工程学报, 2011, 33(9): 1419-1424.
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WANG Kun, XIE Kang-he, LIU Xing-wang, LI Chuan-xun, DENG Yue-bao. Solution for one-dimensional consolidation with threshold gradient subjected to non-uniformly distributed initial pore water pressure[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(9): 1419-1424.
Citation: WANG Kun, XIE Kang-he, LIU Xing-wang, LI Chuan-xun, DENG Yue-bao. Solution for one-dimensional consolidation with threshold gradient subjected to non-uniformly distributed initial pore water pressure[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(9): 1419-1424.
shu

初始孔压非均布考虑起始比降的一维固结解  English Version

  • 1. 浙江大学岩土工程研究所，浙江 杭州 310058 ； 2. 浙江大学软弱土与环境土工教育部重点实验室，浙江 杭州 310058 ； 3. 浙江省建筑设计研究院，浙江 杭州 310006

基金项目: 国家自然科学基金项目（ 50878191 ）
详细信息
    作者简介:

    王 坤 (1984 – ) ，男，湖南南县人，博士研究生，从事软黏土力学与地基处理研究。

  • 中图分类号: TU411

Solution for one-dimensional consolidation with threshold gradient subjected to non-uniformly distributed initial pore water pressure

  • (1. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China; 2. MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310058, China; 3. Zhejiang Province Institute of Architectural Design and Research, Hangzhou 310006, China)

摘要

    摘要
  • 摘要: 研究了考虑起始比降的一维固结问题，获得了初始孔压非均布条件下考虑起始比降的一维固结解答，并与已有文献解答进行了对比，讨论了考虑起始比降后土体的一维固结特性。计算分析表明，当初始孔压降小于起始比降时，渗流并不会在整个土层中瞬间发生，而是逐渐向下发展的，起始比降越大，渗流边界移动速度越慢；固结结束时，土体中的孔隙水压力并不会完全消散，且起始比降越大，残余孔隙水压力越大。与不考虑起始比降不同，均质地基平均固结度按沉降定义和按孔压定义是不同的，随着起始比降的增大，按沉降定义的固结度随之增大，而按孔压定义的固结度则随之减小。
    Abstract: An analytical solution is obtained for the one-dimensional consolidation problem considering the threshold gradient. The proposed solution is compared with previous solutions. The results show that the proposed approach is reasonable. Based on the solution, the consolidation behaviors of the ground are discussed. The results show that when the initial pore pressure gradient is less than the threshold gradient, the flow will not occur throughout the whole layer instantaneously but rather gradually from top to bottom. The greater the threshold gradient is, the slower the boundary of seepage moves. The excess pore pressure will not be completely dissipated at the end of consolidation. The greater the threshold gradient is, the larger the residual excess pore pressure is. It is shown that, unlike without the threshold gradient, the average degree of consolidation defined by settlement considering the threshold gradient is different from that defined by pore pressure. The greater the threshold gradient, the larger the average degree of consolidation defined by settlement and the smaller that defined by pore pressure.
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    • 参考文献(12)
  • [1] MILLER R J, LOW P F. Threshold gradient for water flow in clay systems[J]. Soil Science Society of America Proceedings, 1963, 27 (6): 605 – 609.
    [2] MITCHELL J K, YOUNGER J S. Abnormalities in hydraulic flow through fine-grained soils[J]. ASTM Special Publication 417,American Society for Testing and Materials, Philadelphia, 1967: 106 – 141.
    [3] PASCAL F, PASCAL H, MURRAY D W. Consolidation with threshold gradients[J]. International Journal for Numerical and Analytical Methods in Geomechanics, 1981, 5 : 247 – 261.
    [4] 刘慈群 . 有起始比降固结问题的近似解 [J]. 岩土工程学报 , 1982, 4 (3): 107 – 109. (LIU Ci-qun. Approximate solution forone –dimensional consolidation with threshold gradient[J]. Chinese Journal of Geotechnical Engineering, 1982, 4 (3): 107 – 109. (in Chinese))
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    [11] 施建勇 , 问延煦 , 雷国辉 , 等 . 固结试验及其相关问题的讨论 [J]. 河海大学学报 ( 自然科学版 ), 2004, 32 (2): 213 – 215. (SHI Jian-yong, WEN Yan-xu, LEI Guo-hui, et al. Discussion on consolidation test and some relative problems[J]. Journal of Hohai University(Natural Sciences), 2004, 32 (2): 213 – 215. (in Chinese))
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  • 发布日期:  2011-09-14

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