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成层软土地基上土堤填筑稳定性的塑性极限分析

雷国辉, 张惠敏, 刘芳雪, 张飞, 庄妍

雷国辉, 张惠敏, 刘芳雪, 张飞, 庄妍. 成层软土地基上土堤填筑稳定性的塑性极限分析[J]. 岩土工程学报, 2018, 40(8): 1522-1527. DOI: 10.11779/CJGE201808019
引用本文: 雷国辉, 张惠敏, 刘芳雪, 张飞, 庄妍. 成层软土地基上土堤填筑稳定性的塑性极限分析[J]. 岩土工程学报, 2018, 40(8): 1522-1527. DOI: 10.11779/CJGE201808019
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LEI Guo-hui, ZHANG Hui-min, LIU Fang-xue, ZHANG Fei, ZHUANG Yan. Plasticity limit analysis of stability of embankment fill on layered soft soil ground[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(8): 1522-1527. DOI: 10.11779/CJGE201808019
Citation: LEI Guo-hui, ZHANG Hui-min, LIU Fang-xue, ZHANG Fei, ZHUANG Yan. Plasticity limit analysis of stability of embankment fill on layered soft soil ground[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(8): 1522-1527. DOI: 10.11779/CJGE201808019
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成层软土地基上土堤填筑稳定性的塑性极限分析  English Version

  • 1. 河海大学岩土力学与堤坝工程教育部重点实验室,江苏 南京 210098;
    2. 河海大学江苏省岩土工程技术工程研究中心,江苏 南京 210098

基金项目: 国家自然科学基金项目（51578213,51508160）; 中央高校基本科研业务费专项资金项目（2017B00814,2017B20614）; 高等学校学科创新引智计划（“111计划”）项目（B13024）
详细信息
    作者简介:

    雷国辉(1972- ),男,江西丰城人,博士,教授,博士生导师,从事土力学与地基基础工程教学与科研工作。E-mail: leiguohui@hhu.edu.cn。

Plasticity limit analysis of stability of embankment fill on layered soft soil ground

  • 1. Key Laboratory of Geomechanics and Embankment Engineering of Ministry of Education, Hohai University, Nanjing 210098, China;
    2. Jiangsu Research Center for Geotechnical Engineering Technology, Hohai University, Nanjing 210098, China

摘要

    摘要
  • 摘要: 针对成层软土地基上土堤填筑的稳定性分析问题,考虑地基土体的不排水抗剪强度既随土层变化又随深度任意线性变化,根据工程实践中揭示的堤基深层破坏模式,基于塑性极限分析的上限理论,构建满足运动许可的对数螺旋线与圆弧组合的转动破坏机制,建立了便于快速评估成层软土地基上土堤填筑稳定性的临界高度、无量纲化的稳定数、稳定图、最小安全系数和临界滑动面的分析计算方法,并将计算结果与2个土堤失稳现场试验工程案例的实测结果进行了对比。结果表明,采用本文方法计算得到的土堤最小安全系数接近于土堤失稳时的最小安全系数的理论值1.0,计算确定的临界滑动面也与实测的临界滑动面比较接近,从而验证了本文方法的适用性。
    Abstract: The stability of embankment fill on layered soft soil ground is analyzed. For each layer of soft soil, arbitrarily linearly increasing undrained shear strength with depth is considered. According to the deep-seated failure mode revealed from engineering practice, a logarithmic spiral and an arc combined rotational failure mechanism is constructed for the fulfillment of the kinematical admissibility based on the upper bound theory of plasticity limit analysis. The methods for the analysis of the critical embankment height, non-dimensional stability number, stability charts, the minimum factor of safety and the critical slip surface are established for rapid evaluation of the stability of embankment fill on layered soft soil ground. Comparisons are made of the calculated results with the measured ones from two case histories of field tests of embankment failure. It is shown that the minimum factor of safety derived from the proposed method is basically identical to the theoretical value of 1.0 of the minimum factor of safety for embankment instability. The critical slip surface determined by the proposed method is approximately consistent with the measured one. The applicability of the proposed method is thus verified.
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    • 参考文献(17)
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出版历程
  • 收稿日期:  2017-05-09
  • 发布日期:  2018-08-24

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