东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (5): 741-745.DOI: 10.12068/j.issn.1005-3026.2016.05.028

• 资源与土木工程 • 上一篇    下一篇

高速公路复工路基土工格栅的加固补强稳定性

褚夫蛟， 刘敦文， 侯志勇， 杨伟   

  1. (中南大学 资源与安全工程学院， 湖南 长沙410083)
  • 收稿日期:2015-03-17 修回日期:2015-03-17 出版日期:2016-05-15 发布日期:2016-05-13
  • 通讯作者: 褚夫蛟
  • 作者简介:褚夫蛟(1988-)，男，山东枣庄人，中南大学博士研究生； 刘敦文(1971-)，男，湖南祁东人，中南大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金青年科学基金资助项目(51404303)； 中南大学前沿研究计划项目(2010QZZD001)

Reinforcement Stability of Highways Resumption Embankment Geogrid

CHU Fu-jiao， LIU Dun-wen， HOU Zhi-yong， YANG Wei   

  1. School of Resources and Safty Engineering， Central South University， Changsha 410083， China.
  • Received:2015-03-17 Revised:2015-03-17 Online:2016-05-15 Published:2016-05-13
  • Contact: CHU Fu-jiao
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摘要： 由于存在新老路基结合的问题，复建后路面出现了不均匀沉降，并出现了裂缝.根据路基实际情况，采用有限元分析软件midas GTS建立了路基模型，对加固后路基的应力、位移和各工况下土工格栅所承受的轴向内力进行了计算.通过计算得出，在复工路基植入土工格栅进行加固补强，在限制横向位移方面有一定的效果，但对于限制竖向沉降作用不大.当结合部位台阶高度为1.5m时，路基边坡的横向位移及所受的剪应力均相对较小；在新旧路基填土上部增加3层格栅时，格栅所受的内力趋于稳定.

关键词: 高速公路, 复工路基, 土工格栅, midas GTS

Abstract: Because the new and old embankment were combined， there was uneven settlement and crack appeared on the road after reconstruction. According to the actual situation， embankment model was established by finite element analysis software midas GTS. The stress and displacement of the strengthened subgrade and the axial internal force of geogrid under different conditions were calculated. The calculation results indicated that the implanting geogrid in the resumption embankment had effect on the limiting of lateral displacement but little on the vertical settlement. When the step height of binding site was 1.5m， the lateral displacement and the shear stress of embankment slope were smaller. When 3-layer geogrid was added to upper of the combination embankment filling， the internal force tended to be stable.

Key words: highway, resumption embankment, geogrid, midas GTS

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