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不排水条件下黏性土地基承载力系数Nc值的计算与工程应用

王洪新

王洪新. 不排水条件下黏性土地基承载力系数Nc值的计算与工程应用[J]. 岩土工程学报, 2016, 38(3): 546-553. DOI: 10.11779/CJGE201603019
引用本文: 王洪新. 不排水条件下黏性土地基承载力系数Nc值的计算与工程应用[J]. 岩土工程学报, 2016, 38(3): 546-553. DOI: 10.11779/CJGE201603019
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WANG Hong-xin. Estimation and engineering application of bearing capacity factors (Nc) in clay strata under undrained condition[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(3): 546-553. DOI: 10.11779/CJGE201603019
Citation: WANG Hong-xin. Estimation and engineering application of bearing capacity factors (Nc) in clay strata under undrained condition[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(3): 546-553. DOI: 10.11779/CJGE201603019
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不排水条件下黏性土地基承载力系数Nc值的计算与工程应用  English Version

  • 上海城建市政工程(集团)有限公司,上海 200065

详细信息
    作者简介:

    王洪新(1973- ),男,黑龙江望奎人,博士,高级工程师,主要从事基坑工程,盾构法隧道,地基沉降及土力学基础理论研究.E-mail: tjwanghongxin@163.com.

  • 中图分类号: TU 470

Estimation and engineering application of bearing capacity factors (Nc) in clay strata under undrained condition

  • Shanghai Urban Construction Municipal Engineering (Group) Co., Ltd., Shanghai 200065, China

摘要

    摘要
  • 摘要: 为了使黏性土地层地基承载力计算和基坑稳定性分析能够考虑基础形状和深度影响,给出了一个计算地基承载力系数Nc值的近似解析计算方法,可以把不同形状和埋深基础的承载力统一在一个公式中计算.如果对塑性区深度作适当调整,可以使计算结果非常接近试验值和现场数据的调查结果.依据该方法,可证明地基承载力计算时采用的Nc值与基坑稳定性分析时采用的Nc值是同一的.基于该方法,可以使Terzaghi的抗隆起稳定分析方法能够考虑围护结构插入深度的影响;同时,文章也给出了一个浅基础承载力系数的近似估算方法.
    Abstract: In order to consider the effect of shape and depth of foundations in estimation of bearing capacity of foundation soils and stability analysis of excavations, an approximate analytical method to calculate the bearing capacity factor Nc is proposed. According to this method, the estimation of bearing capacity of foundations with different shapes and depths can be unified into the same equation. If the depth of the plastic zone is properly modified, the calculated results will be very close to those from the laboratory test data and the field investigations. It was proven by this method that the value of Nc in the calculation of bearing capacity is identical to that in the analysis of excavation stability. On the basis of the method, the influence of embedment depth of the enclosure structure can be taken into account in the Terzaghi's method for analysis of the stability against heave of excavations. Moreover, an approximate approach to estimate the bearing capacity factors of shallow foundations is also put forward.
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    • 参考文献(16)
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    [16] 王洪新. 考虑基坑形状和平面尺寸的抗隆起稳定安全系数及异形基坑的抗隆起稳定性分析[J]. 岩石力学与工程学报, 2015, 34(12): 2559-2571. (WANG Hong-xin. A cofficient of heave-resistant stability considering shapes and plane sizes and its application to the stability analysis of shaped excavations[J]. Chinese Journal of Rock Mechanics and Engineering, 2015, 34(12): 2559-2571. (in Chinese))
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出版历程
  • 收稿日期:  2015-01-03
  • 发布日期:  2016-03-24

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