拓宽路堤不均匀沉降敏感性因素仿真分析  

Numerical Simulation on Sensitivity of Uneven Settlement of Widening Roadbed

作　　者：吴瑞麟[1] 余海洋[1] 石立万[1] 

机构地区：[1]华中科技大学土木工程与力学学院

出　　处：《华中科技大学学报（城市科学版）》2007年第4期13-16,共4页Journal of Huazhong University of Science and Technology

基　　金：武汉市建委资助项目(武建[2005]94号(3))

摘　　要：本文采用FLAC^3D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。Combining with the of Wuhan, three-dimensional analysis of widening roadbed mutual segment of Wu-Huang freeway and the third annular urban road explicit finite-difference and the main factors of program-FI.AC^3D is used to do deformation uneven settlement sensitivity are pointed out. First, through analyzing sensitivity of the layers of geogrid, the uneven settlement can be affected by the layers of geogrid and the conclusion that three to four layers of reinforced p cost-effective results is proposed. Then, by analyzing sensitivity of the mutuality paramet the new roadbed, a conclusion that the shear in all parameters of soil is the most sensitive f remarkable lay the best er of soil of actor 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.

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 

分 类 号：U416.12[交通运输工程—道路与铁道工程]