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非饱和土条形地基梅耶霍夫极限承载力统一解

张常光, 晏青, 吴礼舟, 曹雪叶, 张成林

张常光, 晏青, 吴礼舟, 曹雪叶, 张成林. 非饱和土条形地基梅耶霍夫极限承载力统一解[J]. 岩土工程学报, 2018, 40(2): 252-261. DOI: 10.11779/CJGE201802005
引用本文: 张常光, 晏青, 吴礼舟, 曹雪叶, 张成林. 非饱和土条形地基梅耶霍夫极限承载力统一解[J]. 岩土工程学报, 2018, 40(2): 252-261. DOI: 10.11779/CJGE201802005
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ZHANG Chang-guang, YAN Qing, WU Li-zhou, CAO Xue-ye, ZHANG Cheng-lin. Unified solution of Meyerhof’s ultimate bearing capacity for strip foundation resting on unsaturated soils[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(2): 252-261. DOI: 10.11779/CJGE201802005
Citation: ZHANG Chang-guang, YAN Qing, WU Li-zhou, CAO Xue-ye, ZHANG Cheng-lin. Unified solution of Meyerhof’s ultimate bearing capacity for strip foundation resting on unsaturated soils[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(2): 252-261. DOI: 10.11779/CJGE201802005
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非饱和土条形地基梅耶霍夫极限承载力统一解  English Version

  • 1.长安大学建筑工程学院,陕西 西安 710061
    2.成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川 成都 610059

基金项目: 中国博士后科学基金项目（2016T90879）; 陕西省博士后科研项目（2015年）; 地质灾害防治与地质环境保护国家重点实验室开放基金项目（SKLGP2017K025）; 中央高校基本科研业务费专项资金项目（310828173402,310828150018）
详细信息
    作者简介:

    张常光(1982-),男,山东菏泽人,博士,副教授,从事非饱和土与地下工程等研究。E-mail: zcg1016@163.com。

  • 中图分类号: TU431

Unified solution of Meyerhof’s ultimate bearing capacity for strip foundation resting on unsaturated soils

  • 1.School of Civil Engineering, Chang'an University, Xi'an 710061, China
    2.State Key Laboratory of Geohazard Prevetion and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China

摘要

    摘要
  • 摘要: 基于非饱和土的抗剪强度统一解,综合考虑中间主应力、基质吸力和强度非线性,建立非饱和土条形地基的梅耶霍夫极限承载力统一解,对比文献滑移线法解答、上限法解答验证所得统一解的正确性和适用性,讨论与太沙基极限承载力的差异及基底粗糙程度效应,并得出中间主应力、高/低基质吸力以及有效强度参数的影响规律。研究结果表明：太沙基极限承载力将旁侧土的抗剪强度简化为均布荷载,夸大了旁侧土的真实作用,计算结果偏大;基底粗糙程度对承载力系数的确定起关键性作用,梅耶霍夫极限承载力随中间主应力效应的增大而显著增加,不考虑中间主应力影响的Mohr-Coulomb解答过于保守;基质吸力具有双重影响,即在低吸力范围内极限承载力线性增加,而在高吸力范围内却逐渐减小并趋于稳定,这是由非饱和土的强度非线性造成的;有效强度参数的影响亦很重要,且有效内摩擦角较有效黏聚力的影响更明显。由于考虑了中间主应力效应、非饱和特性与旁侧土抗剪强度等工程实际情况,本文结果可为地基优化设计与施工提供有益的参考。
    Abstract: Based on the unified solution of shear strength for unsaturated soils, a unified solution of Meyerhof’s ultimate bearing capacity for strip foundation is obtained by considering the effects of intermediate principal stress, matric suction and strength nonlinearity. The validity and applicability of the obtained unified solution are demonstrated by comprising it with the results of the slip-line theory and upper-bound theory available in literatures. The differences of the ultimate bearing capacity between the Terzaghi’s theory and Meyerhof’s theory and the roughness effect of foundation base are discussed. The influences of the intermediate principal stress, high/low matric suction and effective strength parameters are investigated. The findings show that the Terzaghi’s ultimate bearing capacity simplifies the shear strength of lateral soils as uniform load, which exaggerates the real effect of lateral soils and leads to a larger result. The roughness of foundation base is critical for determining the bearing capacity factors. Meyerhof’s ultimate bearing capacity increases significantly with the intermediate principal stress effect, and the results of Mohr-Coulomb criterion are too conservative due to no consideration of the intermediate principal stress. The matric suction has a dual-effect: the ultimate bearing capacity increases linearly in the low suction region, meanwhile it gradually decreases and eventually stabilizes in the high suction region, which is caused by the nonlinear strength of unsaturated soils. The effects of the effective strength parameters are also important, and furthermore the effect of the effective internal friction angle is more obvious than that of the effective cohesion. Due to considering many practical engineering conditions, such as the intermediate principal stress effect, unsaturated characteristics as well as shear strength of lateral soils, this study can provide useful references for the optimization of foundation design and construction.
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  • [1] 马少坤, 黄茂松, 刘怡林. 柔性和刚性浅基础的地基承载能力分析[J]. 岩土力学, 2008, 29(12): 3375-3380.
    (MA Shao-kun, HUANG Mao-song, LIU Yi-lin.Analysis of bearing capacity of subsoil under flexible and rigid shallow foundations[J]. Rock and Soil Mechanics, 2008, 29(12): 3375-3380. (in Chinese))
    [2] 陈乐意, 姜安龙, 李镜培. 考虑地基土自重影响的地基承载力系数[J]. 岩土力学, 2012,33(1): 215-219.
    (CHEN Le-yi, JIANG An-long, LI Jing-pei.Bearing capacity factors for foundations considering influence of soil weight[J]. Rock and Soil Mechanics, 2012,33(1): 215-219. (in Chinese))
    [3] MA Z Y, LIAO H J, DANG F N.Influence of intermediate principal stress on the bearing capacity of strip and circular footings[J]. Journal of Engineering Mechanics, ASCE, 2014, 140(7): 04014041.
    [4] 范文, 白晓宇, 俞茂宏. 基于统一强度理论的地基极限承载力公式[J]. 岩土力学, 2005, 26(10): 1617-1622.
    (FAN Wen, BAI Xiao-yu, YU Mao-hong.Formula of ultimate bearing capacity of shallow foundation based on unified strength theory[J]. Rock and Soil Mechanics, 2005, 26(10): 1617-1622. (in Chinese))
    [5] 高江平, 俞茂宏, 李四平. 太沙基地基极限承载力的双剪统一解[J]. 岩石力学与工程学报, 2005, 24(15): 2736-2740.
    (GAO Jiang-ping, YU Mao-hong, LI Si-ping.Double-shear unified solution of Terzaghi ultimate bearing capacity of foundation[J]. Chinese Journal of Rock Mechanics and Engineering, 2005, 24(15): 2736-2740. (in Chinese))
    [6] 周小平, 张永兴. 利用统一强度理论求解条形地基极限承载力[J]. 重庆大学学报(自然科学版), 2003, 26(11): 109-112.
    (ZHOU Xiao-ping, ZHANG Yong-xing.The ultimate bearing capacity of foundation based on unified strength theory[J]. Journal of Chongqing University (Natural Science Edition), 2003, 26(11): 109-112. (in Chinese))
    [7] WUTTKE F, KAFLE B, LINS Y, et al.Macroelement for statically loaded shallow strip foundation resting on unsaturated soil[J]. International Journal of Geomechanics, ASCE, 2012, 13(5): 557-564.
    [8] .HOUSTON S L, PEREZ-GARCIA N, HOUSTON W N.Shear strength and shear-induced volume change behavior of unsaturated soils from a triaxial test program[J]. Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 2008, 134(11): 1619-1632.
    [9] 张常光, 胡云世, 赵均海. 平面应变条件下非饱和土抗剪强度统一解及应用[J]. 岩土工程学报, 2011, 33(1): 32-37.
    (ZHANG Chang-guang, HU Yun-shi, ZHAO Jun-hai.Unified solution of shear strength for unsaturated soil under plane strain condition and its application[J]. Chinese Journal of Geotechnical Engineering, 2011, 33(1): 32-37. (in Chinese))
    [10] 张常光, 曾开华, 赵均海. 非饱和土临界荷载和太沙基极限承载力解析解[J]. 同济大学学报(自然科学版), 2010, 38(12): 1736-1740.
    (ZHANG Chang-guang, ZENG Kai-hua, ZHAO Jun-hai.Analytical solutions of critical load and Terzaghi’s ultimate bearing capacity for unsaturated soil[J]. Journal of Tongji University (Natural Science), 2010, 38(12): 1736-1740. (in Chinese))
    [11] 李艳, 赵均海, 张常光. 非饱和土条形地基太沙基极限承载力三剪统一解[J]. 岩土力学, 2015, 36(11): 3128-3134.
    (LI Yan, ZHAO Jun-hai, ZHANG Chang-guang.Triple-shear unified solution of Terzaghi’s ultimate bearing capacity for unsaturated soil foundation[J]. Rock and Soil Mechanics, 2015, 36(11): 3128-3134. (in Chinese))
    [12] 俞茂宏. 岩土类材料的统一强度理论及其应用[J]. 岩土工程学报, 1994, 16(2): 1-10.
    (YU Mao-hong.Unified strength theory for geomaterials and its applications[J]. Chinese Journal of Geotechnical Engineering, 1994, 16(2): 1-10. (in Chinese))
    [13] FREDLUND D C, MORGENSTEM N R, WIDGER R A.The shear strength of unsaturated soils[J]. Canadian Geotechnical Journal, 1978, 15(3): 313-321.
    [14] 钱家欢, 殷宗泽. 土工原理与计算[M]. 北京: 中国水利水电出版社, 1995.
    (QIAN Jia-huan, YIN Zong-ze.Geotechnical principle and calculation[M]. Beijing: China Water and Power Press, 1995. (in Chinese))
    [15] MEYERHOF G G.The ultimate bearing capacity of foudations[J]. Géotechnique, 1951,2(4): 301-332.
    [16] 范文, 俞茂宏, 林永亮, 等. 基于统一强度理论的地基极限承载力滑移线分析[J]. 工程地质学报, 2002, 10(增刊): 558-562.
    (FAN Wen, YU Mao-hong, LIN Yong-liang, et al.Analysis of the slip lines for limited bearing capacity of the shallow strip foundation based on the unified strength theory[J]. Journal of Engineering Geology, 2002, 10(S0): 558-562. (in Chinese))
    [17] 赵炼恒, 李亮, 杨峰, 等. 基于SQP和上限法的非饱和土条形基础极限承载力计算[J]. 岩石力学与工程学报, 2009, 28(增刊1): 3021-3028.
    (ZHAO Lian-heng, LI Liang, YANG Feng, et al.Ultimate bearing capacity calculation of strip foundation on unsaturated soil with upper bound theorem and SQP method[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(S1): 3021-3028. (in Chinese))
    [18] 胡卫东, 曹文贵. 基于Meyerhof理论的临坡地基极限承载力简化分析方法[J]. 湖南大学学报(自然科学版), 2015, 42(1): 81-89.
    (HU Wei-dong, CAO Wen-gui.A simplified analysis method for the ultimate bearing capacity of ground foundation near slope based on the theory of Meyerhof[J]. Journal of Hunan University (Natural Sciences), 2015, 42(1): 81-89. (in Chinese))
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出版历程
  • 收稿日期:  2016-11-17
  • 发布日期:  2018-02-24

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