【作者】 刘文白； 邓益兵；

【Author】 LIU Wen-bai College of Ocean Envivonment and Engineering,Shanghai Maritime Univ,Shanghai 200135,China; DENG Yi-bing Dept of Ceorechnical Engineering,Tongji Univ,Shenghai 200092,China

【机构】 上海海事大学海洋环境与工程学院； 同济大学地下建筑与工程系；

【摘要】 通过分析土工格室加固作用机理的3个作用即对填料的侧向约束作用、网兜作用和土工格室与填料的三个方向的摩擦作用,对土工格室加固路堤进行三维有限元分析,结合现场试验研究土工格室加固软土路堤的加筋效果.采用三维薄膜单元模拟筋材研究不同筋材模量以及不同路堤填土材料模量对加筋效果的影响,结果表明:格室模量越大加筋效果越明显,但不与模量提高成比例.路堤填土材料模量的降低对对土工格室减小总沉降和差异沉降效果影响比较大,而对地基土的水平位移影响较小.对湿地软土路基进行现场试验,与对比路段比较分析,土工格室可有效地减少沉降,减少水平位移,提高地基承载力和增强稳定性.更多还原

【Abstract】 Geocell through the reinforcement of the mechanism of the three,to fill the soil of lateral re- straint,geocell cushion role and fill the geocell with the three directions of friction,three-dimensional finite ele- ment analysis and field test were carried out to understand the behavior of geocell-supported soft soil embank- ment.A three-dimensional membrane element was used to numerically simulate the geocell.The parametric in- fluence on the behavior of reinforcement was studied by varying the modulus of geocell and infill soil.The per- formance of the reinforcement was increased with increase in the modulus of geocell,the magnitude of this in- crease was not proportional to the increase in the modulus.The reduction of infill soil modulus significantly influ- enced the performance in terms of reduction in settlement,while the lateral deformation was not influenced very much.By contrasting with the unreinforced embankment in field test,it was found that the geocell could effec- tively reduce the deformation in vertical and lateral,increase the bearing capacity and stability of foundation soil.更多还原