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拓宽路堤不均匀沉降敏感性因素仿真分析
引用本文:吴瑞麟,余海洋,石立万.拓宽路堤不均匀沉降敏感性因素仿真分析[J].华中科技大学学报(城市科学版),2007,24(4):13-16.
作者姓名:吴瑞麟  余海洋  石立万
作者单位:华中科技大学,土木工程与力学学院,湖北,武汉,430074;华中科技大学,控制结构湖北省重点实验室,湖北,武汉,430074
基金项目:湖北省武汉市建委科研项目
摘    要:本文采用FLAC3D三维有限差分分析软件,结合武汉市三环线武黄高速公路共线段拓宽工程,进行拓宽路堤不均匀沉降仿真分析,指出了导致不均匀沉降的主要敏感性因素。首先,通过土工格栅加筋层数对不均匀沉降的敏感性分析,证明了加筋层数对不均匀沉降有显著影响,加筋3~4层时发挥的加筋效果性价比最佳。然后,对新建路堤土体相关参数进行敏感性分析,表明土体剪切模量对新路堤的沉降影响最为敏感。研究成果对路堤加筋处理和公路拓宽工程中新老路基结合部处理均有借鉴意义。

关 键 词:武黄高速公路  拓宽路堤  不均匀沉降  仿真分析  土工格栅
文章编号:1672-7037(2007)04-0013-04
收稿时间:2007-03-20
修稿时间:2007年3月20日

Numerical Simulation on Sensitivity of Uneven Settlement of Widening Roadbed
WU Rui-lin,YU Hai-yang,SHI Li-wan.Numerical Simulation on Sensitivity of Uneven Settlement of Widening Roadbed[J].Journal of Huazhong University of Science and Technology,2007,24(4):13-16.
Authors:WU Rui-lin  YU Hai-yang  SHI Li-wan
Abstract:Combining with the mutual segment of Wu-Huang freeway and the third annular urban road of Wuhan,three-dimensional explicit finite-difference program-FLAC3D is used to do deformation analysis of widening roadbed and the main factors of uneven settlement sensitivity are pointed out.First,through analyzing sensitivity of the layers of geogrid,the uneven settlement can be remarkable affected by the layers of geogrid and the conclusion that three to four layers of reinforced play the best cost-effective results is proposed.Then,by analyzing sensitivity of the mutuality parameter of soil of the new roadbed,a conclusion that the shear in all parameters of soil is the most sensitive factor to the uneven settlement will be get.These conclusions may be used in the design and analysis of reinforced embankment on roadbed and the interface between new and old roadbed in widening roadbed.
Keywords:Wuhuang freeway  widening roadbed  uneven settlement  emulation analysis  geogrid
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