[1]马强,朱健,邢文文,等.具有硬壳层的涵洞地基极限承载力分析[J].郑州大学学报(工学版),2016,37(01):70-74.[doi:10.3969/j.issn.1671-6833.201504039]
　Ma Qiang,Zhu Jian,Xing Wenwen,et al.[J].Journal of Zhengzhou University (Engineering Science),2016,37(01):70-74.[doi:10.3969/j.issn.1671-6833.201504039]
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具有硬壳层的涵洞地基极限承载力分析()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
37卷
期数:
2016年01期
页码:
70-74
栏目:
出版日期:
2016-02-28

文章信息/Info

作者:
马强; 朱健; 邢文文; 胡兴
湖北工业大学 土木工程与建筑学院,湖北 武汉,430068
Author(s):
Ma Qiang;  Zhu Jian;  Xing Wenwen;  Hu Xing
School of Civil Engineering and Architecture, Hubei University of Technology, Wuhan, Hubei 430068 
关键词:
硬壳层; 涵洞; 地基; 极限承载力; 数值模拟
Keywords:
DOI:
10.3969/j.issn.1671-6833.201504039
文献标志码:
A
摘要:
依据涵洞两侧填土荷载的特点,基于极限平衡理论,在迈耶霍夫-汉纳极限承载力公式基础上,推导了用于计算具有硬壳层的涵洞地基极限承载力的计算公式.将汉森加权平均法、应力扩散角法、本文提出的改进公式法和有限元法的计算结果进行对比分析,研究了路堤填土高度、硬壳层厚度、硬壳层与下卧软土层的黏聚力比和内摩擦角比对极限承载力的影响,并将工程实例结果与4种理论计算方法的计算结果进行对比.结果表明:随着路堤填土高度和硬壳层厚度的增加,改进公式法和有限元法计算的地基承载力结果最为接近;黏聚力比和内摩擦角比的变化对改进公式法和有限元法的计算结果影响较为一致;改进公式法的计算结果比汉森加权法和扩散应力角法更加接近工程实例.
Abstract:
According to the characteristics of the load of the lateral embankment filling on the culvert, based on the limit equilibrium theory and the ultimate bearing capacity formula of Meyehof and Hanna, the formula for calculating ultimate bearing capacity of the culvert foundation with crust layer was deduced. A series of comparisons were carried out among the calculation results obtained from Hansen’s weighted average method, the stress diffusion angle method, the improved formula proposed in this paper and the finite element method. And the influences of the height of embankment filling, the thickness of crust layer, the ratio of cohesive and the internal friction angle of the crust layer to the subjacent soil layer on the ultimate bearing capacity were in-vestigated, in addition, a comparison of the results was made from engineering practical examples and the cal-culation results from the four theoretical calculation methods. The results show that with the increase of height of embankment filling and the thickness of crust layer, the results of the foundation bearing capacity calculated by the proposed improved formula method and finite element method are the closest. The influence of the variations of co-hesive ratio and internal friction angle ratio on the calculated results of the proposed formula method is more con-sistent with that of the finite element method. The results of the proposed formula method are more approximate to the engineering practical examples than Hansen’s weighted method and the stress diffusion angle method.
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