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浙江大学学报(工学版)
J4  2013, Vol. 47 Issue (11): 1939-1944    DOI: 10.3785/j.issn.1008-973X.2013.11.008
土木工程     
交通荷载作用下软土地基的累积沉降分析
胡安峰1,2, 孙波1,2,3, 谢康和1,2, 贾玉帅1,2
1.浙江大学 浙江大学滨海和城市岩土工程研究中心,浙江 杭州 310058；
2.浙江大学 软弱土与环境土工教育部重点实验室,浙江 杭州 310058；
3.中铁第四勘察设计院集团有限公司,湖北 武汉 430063
An analysis of cumulative settlement of soft soil under traffic loading
HU An-feng1,2,SUN Bo1,2,3,XIE Kang-he1,2,JIA Yu-shuai1,2
1.Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou 310058, China;
2.MOE Key Laboratory of Soft and Geoenvironmental Engineering , Zhejiang University, Hangzhou 310058, China;
3.China Railway Siyuan Survey and Design Group CO.,LTD, Wuhan 430063, China
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摘要：

针对交通荷载作用下软土地基的累计沉降问题，提出采用土体刚度衰减修正公式计算累计塑形变形的方法.基于饱和软土循环三轴试验数据，建立刚度衰减系数与循环次数间的关系.对有限元软件ABAQUS进行二次开发，将刚度衰减模型嵌入到有限元分析程序中去，再通过数值分析计算出任意循环周数后土体的累积塑性变形.采用该方法对交通荷载作用下典型上海软土地基的累积沉降进行预测.计算结果表明，路面结构层的存在有助于减小软土地基的沉降，交通荷载所引起的沉降主要发生在软土地基的浅层，并且随着深度的增加而迅速减小.
Abstract:

Using a modified stiffness degradation model, a method for calculating the cumulative deformation induced by traffic load was proposed. Firstly, based on the cyclic triaxial test results, the relationship between the degradation index and the number of cycles was built. Then, the stiffness degradation model was embedded into ABAQUS software by secondary development method. And the accumulated plastic deformation after each cyclic loading could also be obtained. Finally, the new method presented herein was applied to predict the long-term settlement of shanghai soft soil under the traffic load. It is found that the existence of the pavement structure layer can contribute to reduce the settlement of soft soil. The settlement due to the traffic load mainly occur in the shallow area of soft soil and decreases quickly along with the increase of the depth.
出版日期: 2013-11-01
:  TU 478  
作者简介: 胡安峰(1974-)，男，博士，副教授，主要从事土动力学的研究.E-mail:anfenghu@zju.edu.cn
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引用本文:

胡安峰, 孙波, 谢康和, 贾玉帅. 交通荷载作用下软土地基的累积沉降分析[J]. J4, 2013, 47(11): 1939-1944.

HU An-feng,SUN Bo,XIE Kang-he,JIA Yu-shuai. An analysis of cumulative settlement of soft soil under traffic loading. J4, 2013, 47(11): 1939-1944.

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http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2013.11.008    或    http://www.zjujournals.com/eng/CN/Y2013/V47/I11/1939

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