文档介绍：华中科技大学
硕士学位论文
均匀化方法在高速公路路基拓宽分析中的应用
姓名:周盛沛
申请学位级别:硕士
专业:道路与铁道工程
指导教师:卢应发
20070531
摘要
近年来,随着我国高速公路交通量急剧增长,前期修筑的四车道高速公路通行能
力早已满足不了交通需求,对原有高速公路进行拓宽改造的任务已经迫在眉睫。而
拓宽后所出现的新老路基不均匀沉降,直接会反射到路面结构,导致路面出现开裂、
下陷等病害现象,缩短了高速公路的使用寿命以及危害了过往车辆的行车安全。因
此,如何正确地分析该问题的性状与影响因素,提出有效的处治手段,是高速公路
建设领域中一个重要的研究方向。
本文以教育部回国留学人员基金项目(206097)为依托,通过国内外调研,结
合均匀化方法的基本理论求出横观各向同性刚度矩阵的有限元表达式。接着紧密联
系工程实际,运用 Drucker-Prager 弹塑性模型,通过有限元程序 ANSYS 对路基拓宽
工程进行了非线性有限元分析。详细分析了路基内部应力-应变状态,考虑了计算模
型的最优计算区域及最不利荷载情况,并对几个影响不均匀沉降发生的路基设计参
数进行了敏感性分析。
为控制新老路基不均匀沉降的发生,国内外学者提出了一系列控制标准及对应
的处治措施。本文介绍了主要的几种处治措施,并在上述研究的基础上,对这些措
施的处治效果进行了对比和分析。
文章的最后对研究成果进行了归纳,并对进一步研究方向进行了展望。

关键词:高速公路;均匀化方法;路基;拓宽;不均匀沉降;有限元分析

I
Abstract
In recent years, with the requirements of the rapid increasing traffic flow of highways
in our country, the existing 4-lane highways constructed on the early stage can no longer
meet the traffic demand. So it is very urgent to widen the existing highways in China. As
we know, the uneven settlement between new and old subgrade happens after widening. It
will reflect to the pavement structure and cause damage such as dehiscence and sink,
which will shorten the service life of highways and endanger the safety of the running. So
it is a significant research direction to analyze the behavior and influencing factors of the
problem accurately, as well as finding some effective treatments in highways construction
field.
Based on the support of the repatriate personal fund of Chinese education ministry
(206097), and through the survey home and abroad, an effective stiffness matrix results for
transversal isotropic geological material was obtained in this paper with the application of
homogenization method. In the following, the paper contacted with the fact in the
engineering, using Drucker-Prager elastoplastic constitutive model and FEA program
ANSYS, and carried out the nonlinear finite element analysis of the widening project.
Then, it achiev