岩土力学 ›› 2020, Vol. 41 ›› Issue (8): 2583-2591.doi: 10.16285/j.rsm.2018.2047

• 基础理论与实验研究 • 上一篇    下一篇

结构性土一维非线性大应变固结半解析解

胡安峰1, 2，周禹杉1, 2, 3，陈缘1, 2，夏长青1, 2，谢康和1, 2   

  1. 1. 浙江大学 滨海和城市岩土工程研究中心，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. 浙江大学建筑设计研究院有限公司，浙江 杭州 310028
  • 收稿日期:2018-11-07 修回日期:2019-11-15 出版日期:2020-08-14 发布日期:2020-10-17
  • 通讯作者: 周禹杉，女，1993年生，硕士研究生，主要从事为软黏土一维固结理论方面的研究工作。E-mail：twoe@foxmail.com E-mail:anfenghu@zju.edu.cn
  • 作者简介:胡安峰，男，1974年生，博士，副教授，主要从事软土一维固结及桩的动力响应等方面的教学和科研工作
  • 基金资助:
    国家自然科学基金（No. 51778572，No. 51978612）

Semi-analytical solutions for one-dimensional nonlinear large strain consolidation of structured soft clay

HU An-feng1, 2, ZHOU Yu-shan1, 2, 3, CHEN Yuan1, 2, XIA Chang-qing1, 2, XIE Kang-he1, 2   

  1. 1. Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou, Zhejiang 310058, China; 2. Key Laboratory of Soft Soils and Geoenvironmental Engineering of Ministry of Education, Zhejiang University, Hangzhou, Zhejiang 310058, China; 3. The Architectural Design and Research Institute of Zhejiang University Co., Ltd., Hangzhou, Zhejiang 310028, China
  • Received:2018-11-07 Revised:2019-11-15 Online:2020-08-14 Published:2020-10-17
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (51778572, 51978612).

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摘要： 以结构性较强的天然饱和软黏土为研究对象，考虑了沉积作用对其自重应力的影响，以及压缩性和渗透性的非线性变化，推导了任意加载条件下结构性土一维大应变固结控制方程，并采用半解析的方法对方程进行求解计算。再将其退化为无结构性的饱和软黏土固结解，与已有的大应变固结解进行了对比，验证了该解的正确性。最后将该半解析解计算结果与小应变固结理论解、不考虑结构性的固结理论解计算结果进行对比分析。结果表明：大应变固结理论的沉降计算值大于小应变固结理论的计算值，且二者的差值随着荷载的增加而增加；当考虑土体的结构性时，地表沉降计算值小于不考虑土体结构性的沉降计算值。

关键词: 结构性土, 大应变, 非线性固结, 半解析解

Abstract: In the analysis of consolidation of naturally saturated soft clay with strong structure, the influence of sedimentation on self-weight stress, the nonlinear variation of compressibility and permeability were considered. The one-dimensional large strain consolidation equations under arbitrary loading conditions were derived and solved by a semi-analytical method. Then the solutions were degraded into solutions of a non-structured saturated soft clay consolidation theory. By comparing the degraded semi-analytical solutions with the existing large strain consolidation solutions, the solutions of the one-dimensional large strain consolidation equations were proved to be right. At last, the consolidation behaviours of semi-analytical solutions were compared with the theoretical solutions of small strain consolidation theory and the the theoretical solution of the consolidation theory without considering the structure. The comparison results show that the settlement at any time of large strain consolidation theory is greater than that of the small strain consolidation theory, and the difference between the two increases with the increase of the load. When considering the structure of the soft soil, the settlement of large strain consolidation is smaller than the calculated value without considering the soil structure.

Key words: structured soil, large strain, nonlinear consolidation, semi-analytical solutions

中图分类号: TU 433
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