加筋膨胀土路堤稳定性数值模拟研究

doi:10.3969/j.issn.1674-0696.2011.06.21

重庆交通大学学报（自然科学版） ›› 2011, Vol. 30 ›› Issue (6): 1347-1352.DOI: 10.3969/j.issn.1674-0696.2011.06.21

加筋膨胀土路堤稳定性数值模拟研究

韦秉旭

长沙理工大学交通运输工程学院，湖南长沙41000

收稿日期:2011-06-07 修回日期:2011-09-22 出版日期:2011-12-15 发布日期:2015-01-22
作者简介:韦秉旭(1970—)，男，陕西户县人，教授，博士，主要从事特殊土路基方面的研究。E-mail：weibingxu555@163.com。
基金资助:
交通运输部西部交通科技项目(2002318000015)

Numerical Simulation of the Stability of Expansive Soils Embankm ent Reinforced by Geogrid

WEI Bing-xu

School of Traffic＆Transportation Engineering，Changsha University of Science＆ Technology，Changsha 410004，Hunan，China

Received:2011-06-07 Revised:2011-09-22 Online:2011-12-15 Published:2015-01-22

摘要/Abstract

摘要： 引入含水率，建立了非饱和土的强度和应力一含水率一应变关系；在考虑土工格栅与填土问的相互作用、膨胀土吸水膨胀、软化特性等因素的基础上，提出了土工格栅加筋路堤稳定性的数值计算新方法，算例分析表明了该方法的合理性。在加筋膨胀土路堤的稳定性计算中引人工程中易于确定的含水率，避开了复杂的非饱和土理论体系，通过相关参数随含水率的变化关系间接实现了非饱和土边坡的特征，为非饱和土理论成果的工程实用化提供了有效地解决途径。

关键词: 道路工程, 稳定性, 膨胀土路堤, 数值模拟

Abstract: Strength and stress．moisture content．strain relationship of unsaturated soil is established by introduction of mois- ture content．W ith the consideration of some key factors，such as the interaction between geogrids and expan sive soil，ex- pansion which is caused by absorbing water and softening characteristics，a new stability calculation method is proposed to calculate the stability of expansive soils embankment reinforced by geogrid．A case study shows that the approach is reasonable． Moisture ratio which Can be easily gained in geotechnical engineering is introduced into the calculation approach of sta- bility for expansive soil embankment reinforced by geogrid，which avoids the complex theoretical system of unsaturated soil． The characteristics of slope and unsaturated soil are indirectly realized by the relationship that kinds of soil property parame- ters vary synchronously with moisture content．Therefore，the proposed method is an effective way to realize practical engi- neering purpose of theoretical achievements of unsaturated soil．

Key words: road engineering, stability, expansive soils embankment, numerical simulation

中图分类号:

U416.1⁺2

韦秉旭. 加筋膨胀土路堤稳定性数值模拟研究[J]. 重庆交通大学学报（自然科学版）, 2011, 30(6): 1347-1352.

WEI Bing-xu. Numerical Simulation of the Stability of Expansive Soils Embankm ent Reinforced by Geogrid[J]. Journal of Chongqing Jiaotong University(Natural Science), 2011, 30(6): 1347-1352.

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加筋膨胀土路堤稳定性数值模拟研究

Numerical Simulation of the Stability of Expansive Soils Embankm ent Reinforced by Geogrid

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