摘要
近年来,随着高速公路的快速发展,因路基沉降造成的公路病害问题日益突出。目前路基沉降的研究方法很多,本文通过在十慢高速公路填方路段进行路基沉降试验测试,并采用ANSYS软件进行数值模拟,来研究路基沉降规律。取路堤的一个断面,按照平面应变问题进行分析。土体定义为弹塑性材料来建立有限元模型。主要的结果有:a.高速公路在高填方路段的路基沉降主要由初始沉降、固结沉降、次固结沉降三部分组成;b.数值模拟的沉降量曲线具有单调递增性,存在反弯点,当时间趋于无穷大时,沉降量趋近于一固定值;c.路基运营阶段的沉降大部分为次压缩沉降,其数值很小。
The rapid development of highways in recent years has met increasingly rising roadbed sedimentation problems. This paper tries to study the laws of subgrade settlements by experimental study and numerical simulation. Finite element software of ANSYS is used to simulate the subgrade settlements at K32＋400 point of Shiman highway. Cross section is taken to be analyzed as a plane strain problems. Finite element model is established by that soil is defined as elastic-plastic materials, whose results are as follows： 1. The subgrade settlement in the deeply filled part of a highway is divided into three categories： the initial settlement, the consolidation settlement and the second consolidation settlement. 2. The curve of the settlements of numerical simulation possesses the feature of consistently increasing. Anti-point bending exists, and when the time is limitless, the amount of settlement tends to be a definite value. 3. The real condition in use is mainly second consolidation settlement and its amount is pretty small.
出处
《华中科技大学学报（城市科学版）》
CAS
2008年第4期54-56,共3页
Journal of Huazhong University of Science and Technology
关键词
路基沉降
试验研究
数值模拟
subgrade settlement
experimental study
numerical simulation
作者简介
熊健民（1957-），男，河南信阳人，教授，博导，研究方向为工程结构的病害诊断与防治，xjm@mail．hbut．edu．cn。
