CFG桩复合地基土工格栅抗拉强度数值分析

对土工格栅在CFG桩复合地基中的工作机理进行了数值模拟,研究了在不同的桩间距、垫层模量下,格栅抗拉强度EA对路基的沉降、坡脚水平位移和桩承担荷载的影响,研究表明,格栅抗拉强度EA对桩与土沉降影响不大,通过改变格栅抗拉强度EA来影响桩土沉降差远没有通过改变垫层模量来影响桩土沉降差效果好,提高格栅抗拉强度可以减小路基坡脚水平位移。

Numerical study of the geogrid' s tensile strength about CFG pile composite foundation

Numerical simulation experimentations are carried out on the working mechanism of the geogrid in the CFG pile composite foundation.The effect of the geogrid＇s tensile strength to the settlement of subgrade,horizontal displacement of embankment＇s foot and loads of piles bear are studied under different pile spacing and the cushion modulus.The results show： the geogrid＇s tensile strength has little effect to the settlement of pile and soil.The effect to influence settlement of poor soil-pile by changing the cushion modulus is better than by changing EA.Increasing the tensile strength can reduce the horizontal displacement of embankment＇s foot.