桩承式加筋路堤挂网技术侧向位移影响分析

针对桩承式加筋路堤应用于高填方路堤下处理软土地基的缺陷,考虑在土工格栅铺设工艺上加以改进,研发出桩承式加筋路堤挂网技术.通过假设自由位移场,采用2阶段法对桩承式加筋路堤挂网技术与现有技术作用下单桩侧向位移进行对比分析.分析结果表明：相对于普通加筋,采用挂网加筋可以有效约束路基侧向位移和路基深层侧向位移.随着筋材模量和桩体抗弯刚度的增大,挂网加筋对路基侧向位移的约束作用逐渐增强;软土弹性模量越小,挂网加筋对路基侧向位移的约束作用越好.

Analysis of lateral displacement in fixed geosynthetic technique of geosynthetic reinforced and pile supported embankment

As some defects in geosynthetic reinforced and pile supported(GRPS) embankment on soft soil still exists,thus the fixed geosynthetic technique(FGT) was developed by improving the laying technique of geosynthetic of GRPS.Compared with the ordinary laying technique,two-stage analysis method was used to study the advantage of this technique based on the assumed free-field soil displacement.The result shows that adoption of the technique can significantly resist the lateral displacement,especially at the deep soft soil.With the increase of the tensile stiffness of geosynthetic and the flexural rigidity of pile,the lateral displacement decreases clearly,and with the increase of the inelastic modulus of soft soil,the influencing of restriction reduces.