Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (4): 113-118,126.doi: 10.3969/j.issn.1000-565X.2013.04.019

• Traffic & Transportation Engineering • Previous Articles     Next Articles

Deformation of Reinforced Soil Retaining Wall on Soft Soil Ground Considering Creep Effects

Wang Yi-min1 Zou Chao1 Gao Shui-qin2   

  1. 1.School of Civil Engineering and Transportation∥State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.Jiangsu Weixin Engineering Consultants Ltd.,Nanjing 210000,Jiangsu,China
  • Received:2012-11-14 Revised:2013-03-01 Online:2013-04-25 Published:2013-03-01
  • Contact: 汪益敏(1966-)，女，博士，教授，主要从事路基与边坡工程研究． E-mail:ctymwang@scut.edu.cn
  • About author:汪益敏(1966-)，女，博士，教授，主要从事路基与边坡工程研究．
  • Supported by:

    国家自然科学基金资助项目( 50808086) ; 亚热带建筑科学国家重点实验室创新探索研究课题( 2010ZC15)

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Abstract:

In order to explore the long-term performance of the geogrid-reinforced soil retaining walls and the softsoil ground under combined action,the creep properties of the geogrid and the soft soil were investigated throughcreep tests,and a constitutive model considering the creep effect was established based on experimental results.Then,a case study on a geogrid-reinforced soil retaining wall built on soft soil ground was performed by using the finiteelement method,and the long-term deformation performance of the wall considering the creep effect of reinforcementmaterial was analyzed.The results show that ( 1) the proposed numerical model is effective in simulatingthe long-term creep behaviors of the reinforced soil retaining wall on soft soil ground; ( 2) the lateral displacementof the reinforced wall gradually increases with time and becomes larger at the central part but smaller at the twoends of the wall; ( 3) with the prolonging of time,the position of maximum lateral displacement along the wall becomeshigher; and ( 4) due to the influence of foundation deformation,the positions of maximum tension and strainof each geogrid layer are different from the Rankine failure surface stated by the current design theory.In addition,the distribution law of geogrid tension and strain along the wall at different times,which is obtained by numericalsimulation,provides some references for the design of reinforced soil retaining walls on soft soil ground.

Key words: road engineering, reinforced soil retaining wall, geogrid, deformation, creep effect, finite element analysis

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