土工基础

土工基础 ›› 2021, Vol. 35 ›› Issue (6): 751-753.

• 专题论述 • 上一篇    下一篇

浅基础条形地基承载力特征值—中德规范计算结果的对比分析

陈传涛1，徐采薇1,2   

  1. （1.广东省建科建筑设计院有限公司，广州 510110；2.墨尔本大学基础设施工程学院，3010 帕克维尔，澳大利亚）
  • 收稿日期:2021-09-03 修回日期:2021-09-07 出版日期:2021-12-30 发布日期:2021-12-24
  • 作者简介:陈传涛（1987-），男，博士，研究方向为基坑，边坡，隧道等。

Bearing Capacity of a Shallow Strip Foundation-Comparison of Results between German Standard and Chinese Standard

CHEN Chuantao1， XU Caiwei1,2   

  1. (1.Guangdong Jianke Architectural Design Institute Co., Ltd., Guangzhou 510110；
    2.Department of Infrastructure Engineering, University of Melbourne, Parkville, 3010, Australia)
  • Received:2021-09-03 Revised:2021-09-07 Online:2021-12-30 Published:2021-12-24

摘要： 德国规范(DIN4017)和我国规范(GB 50007-2011)均采用Terzaghi叠加法作为基本公式对均质土上条形浅地基基础的极限承载力进行计算；德国规范中的承载力系数Nq、Nc是由Prandtl在经典破坏准则下，利用无重量土的假设推导得出，Nr（Nb）是结合实验数据得出的经验值，通过引入安全系数，得到修正后的承载力特征值；我国规范在计算地基承载力考虑了对地基沉降的控制，在计算承载力特征值时使用半理论半经验确定的承载力系数；针对两国规范的不同，通过案例计算，使用两国规范分别计算地基承载力特征值的结果具有可比性，对比试验测定的承载力特征值表明两国规范都是偏保守的。

关键词: 地基承载力, 叠加法, 破坏机理

Abstract: The Terzaghi basic bearing capacity formula with superposition method is used by the German Standard DIN4017 and Chinese Standard GB 50007-2011 to estimate the bearing capacity of a shallow strip foundation on homogeneous soil; the bearing capacity coefficients in DIN4017 are obtained with the conventional failure modes by Prandtl (Nq and Nc) and from the experimental results (Nr), in addition, the characteristic value of the bearing capacity could be estimated with the additional safety factor. The settlement-control of the foundation is considered by Chinese Standard; hence the characteristic bearing capacity is obtained using the semi-empirical value of the coefficients; the comparison between the results of case study shows that the bearing capacity estimated by DN4017 and GB 50007-2011 are comparable and both methods are proved to be conservative. 

Key words: bearing capacity, superposition, failure modes

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