| 山区公路斜坡填筑路堤应力形变特征及影响因素分析 |
| |
| 引用本文： | 陈义军,刘长武,徐进,曾德建,康亚明.山区公路斜坡填筑路堤应力形变特征及影响因素分析[J].岩土力学,2009,30(4):1051-1056. |
| |
| 作者姓名： | 陈义军 刘长武 徐进 曾德建 康亚明 |
| |
| 作者单位： | 四川大学 水利水电学院，成都 610065 |
| |
| 基金项目： | 国家自然科学基金，交通部西部交通建设科技项目 |
| |
| 摘 要： | 以某高速公路的土石混料填筑路堤为研究对象，通过室内大型三轴试验，获得填料的力学参数并建立相应本构关系；在此基础上，对斜坡的不同坡度及设置开挖台阶条件下的填筑路堤进行了数值模拟分析，揭示了该斜坡路堤的应力形变特征，并分析了影响因素。结果表明，填筑体以沉降变形为主，在中下部引起水平外鼓，填筑体与斜坡间有相对滑动趋势；内部应力从路基表部向深部增加，在交界面附近应力产生集中并达到最大；应力、形变值与填基高度成正比，与坡度成反比；随坡度增加，位移矢量偏移加剧，相对滑动趋势增强，设置开挖台阶能有效消除此种滑移趋势，提高路堤的稳定性。
|
| 关 键 词： | 公路路堤 应力形变场 影响因素 数值模拟 斜坡 |
| 收稿时间： | 2008-03-10 |
Analysis of deformation stress feature and influential factors about road-dike on ramp in mountainous region expressway |
| |
| CHEN Yi-jun,LIU Chang-wu,XU Jin,ZHENG De-jian,KANG Ya-ming.Analysis of deformation stress feature and influential factors about road-dike on ramp in mountainous region expressway[J].Rock and Soil Mechanics,2009,30(4):1051-1056. |
| |
| Authors: | CHEN Yi-jun LIU Chang-wu XU Jin ZHENG De-jian KANG Ya-ming |
| |
| Institution: | School of Water Resources and Hydropower, Sichuan University, Chengdu 610065, China |
| |
| Abstract: | Researching on soil-stone embankment of some expressway, the mechanical parameter of filling and corresponding constitutive relationship is obtained by triaxial test. Analyzing the different degrees of road-dike and digging steps with different sections in road-dike, the deformation stress feature is disclosured and the influential factors are analyzed. The research results indicate that the sedimentation is the major deformation, and it causes horizontal heave in middle-under parts and tendency toward sliding between filling and ramp is obtained. Internal stresses are increased towards to the deep part; and it comes to the top nearby the interface. The stress deformations have direct ratios with height of filling and inverse ratios with degree of slope. Along with the increase of degree of slope, deviation of the displacement phasor was aggravated; the tendency toward sliding was strengthened. And setting digging steps can eliminate the relative sliding tendency effectively, so as to improve the stability of roadbed. |
| |
| Keywords: | road-dike stress and deformation field influential factor numerical simulation ramp |
| 本文献已被 维普 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
|
