OALib Journal期刊
桩-网复合路基变形机理的数值分析
, PP. 37-41
Keywords: 道路工程 ,桩-网复合路基 ,有限元 ,沉降 ,位移
Abstract:
基于桩-网复合地基桩-网-土体系作用机理的复杂性，理论研究落后于工程实践等现状，对桩-网复合路基变形机理理论进行了分析，运用有限元数值模拟的方法，对一种新型软土地基处理的路基的沉降、侧向位移、差异沉降进行了数值分析研究。结果表明(1)在垫层与填土间加入土工格栅后，能减少路基顶面及底面的沉降，但能够更明显地减少路基顶面及底面的差异沉降和坡脚侧向位移；(2)桩间土强度的增加对于路基底面最大差异沉降的影响要比路基顶面要大，路基顶面最大差异沉降的增加大致与桩间距的增加呈正比关系；(3)路堤底面的沉降量出现谷值点是由于桩体作用所致，峰值点是由于土拱效应所致；(4)较大的土工格栅拉伸模量对于减小路基顶面沉降的效果是不明显的，合适的土工格栅拉伸模量能够减小经济投入。
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