土工格栅对路基拓宽分层填筑变形的影响研究  

Effect of Geogrid on Deformation of Subgrade in Layered Filling for Widening

作　　者：邓宇 孟宝华 章宁 王宁[3] 

机构地区：[1]中冶成都勘察研究总院有限公司,成都610023 [2]四川兴承建筑工程有限公司,成都610101 [3]西南科技大学土木工程与建筑学院,四川绵阳623000

出　　处：《路基工程》2018年第1期90-96,共7页Subgrade Engineering

基　　金：国家自然科学基金项目(10602048);四川省科技厅项目(2009YJ0060)

摘　　要：以四川某省道拓宽项目为例,结合数值模拟试验及现场资料,对路基拓宽分层填筑下变形及土工格栅处治效果进行研究。FLAC3D数值模拟结果表明:地基对路基顶面竖向变形起主导作用,新路基对拓宽后路基顶面水平位移起主导作用。采取土工格栅处治的效果明显,加筋后路基和地基水平位移减小明显,道路变形更加协调。Taking a project of provincial road widening in Sichuan as an example, the paper herein combined with numerical simulation test and field data, and studied the deformation of subgrade in layered filling for widening and the treatment effect of geogrid. The result of FLAC3D numerical simulation shows that the foundation dominates the vertical deformation of subgrade top, and the new subgrade dominates the horizontal displacement of widened subgrade top. The treatment effect of geogrid is obvious, and after reinforcement, horizontal displacement of subgrade and foundation reduces greatly, thus the road deformation is more reconciled.

关 键 词：拓宽路基 变形特性 FLAC3D 分层填筑 土工格栅 

分 类 号：U416.1[交通运输工程—道路与铁道工程]