非均质各向异性黏土光滑条基承载力上限解

›› 2011, Vol. 32 ›› Issue (2): 611-616.

非均质各向异性黏土光滑条基承载力上限解

秦会来¹，王玉杰¹，唐志丹²，马少坤³

1.中国水利水电科学研究院岩土工程研究所，北京 100048；2.中国水电顾问集团成都勘测设计研究院，成都 610072； 3.广西大学土木建筑工程学院，南宁 530004

收稿日期:2009-11-04 出版日期:2011-02-10 发布日期:2011-02-16
作者简介:秦会来，男，1979年生，博士，主要从事岩土工程稳定性问题极限分析研究。
基金资助:
铁道部铁路客站关键技术研究重点课题（No. 2009G007－B）；中国博士后科学基金（No. 20090460397）。

Upper bound solutions for bearing capacity of smooth rigid strip foundations on anisotropic and non-homogeneous clay

QIN Hui-lai¹, WANG Yu-jie¹, TANG Zhi-dan², MA Shao-kun³

1. Department of Geotechnical Engineering, China Institute of Water Resources and Hydropower Research, Beijing 100048, China; 2. Chengdu Hydroelectric Investigation Design Institute, China Hydropower Consulting Group, Chengdu 610072, China; 3. College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China
616

Received:2009-11-04 Online:2011-02-10 Published:2011-02-16

摘要/Abstract

摘要：

黏土地基中土体强度的非均质和各向异性是比较突出的现象。在已有工作的基础上，根据目前常用的不排水条件下饱和黏土非均质和各向异性强度模型，采用已被证实计算光滑条基极限承载力相当高效的多块体离散模式，编制了考虑强度非均质和各向异性时黏土地基上光滑条基地基承载力计算的多块体上限解计算程序，实现了非均质各向异性黏土地基上光滑条基地基极限承载力的多块体上限解法。为验证多块体上限解法的应用情况，将计算结果与已有的上限解、滑移线解等做了广泛的对比发现，该处计算非均质和各向异性黏土地基上光滑条基极限承载力的上限方法是相当有效的。为方便应用，基于多块体上限方法给出了非均质和各向异性条件下地基承载力系数的计算曲线。探讨了随土体强度非均质和各向异性的变化规律。通过分析非均质条件对地基破坏面的影响，揭示了非均质对地基承载力影响的内在原因。

关键词: 非均质, 各向异性, 上限法, 地基承载力

Abstract:

Strength anisotropy and non-homogeneity are common phenomenon in clays. It is obvious that the anisotropy and non-homogeneity characteristics influence the bearing capacity of the foundations. To study this influence, the multi-block upper bound method is employed to calculate the bearing capacity of smooth strip foundations resting on the clay with anisotropic and non-homogeneous strength. The failure mechanism adopted by the upper bound method has already been verified by other scholars to be the best mechanism to calculate the bearing capacity of the smooth strip foundations on isotropic and homogeneous soils. The implementation of the multi-block upper bound method to calculate the bearing capacities in the anisotropy and non-homogeneity clays is presented. And the calculation program is compiled in the Fortran 90 language. To examine the calculation results by the multi-block upper bound method, comparisons are made with the results given by the characteristic method and other solutions by the upper bound method. It can be found that the method in this paper always gives the best results in all of the other upper bound solutions mentioned. With the multi-block upper bound method in this paper, the values are given in figures for different anisotropic and non-homogeneous coefficients. The effect of non-homogeneity on the failure envelops is also discussed to disclose the inner reasons for the influence law of non-homogeneity on the bearing capacity.

Key words: non-homogeneity, anisotropy, upper bound, bearing capacity

中图分类号:

TU 432

秦会来，王玉杰，唐志丹，马少坤. 非均质各向异性黏土光滑条基承载力上限解[J]. , 2011, 32(2): 611-616.

QIN Hui-lai, WANG Yu-jie, TANG Zhi-dan, MA Shao-kun. Upper bound solutions for bearing capacity of smooth rigid strip foundations on anisotropic and non-homogeneous clay[J]. , 2011, 32(2): 611-616.

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