土工格栅处理填挖交界地基的现场检测研究

以延安新区综合管廊项目中土工格栅处理地基为背景,为了研究土工格栅对地基非均匀沉降的效果,现场试验段进行了沉降观测、FWD弯沉检测、铺设与未铺设土工格栅的弯沉盆对比等试验,探讨了回填土高度对弯沉盆的影响以及地基回填模量的影响因素。证明分层铺土工格栅不仅可以有效地提高填土抵抗变形能力,而且具有使土体连成整体水平传递张力的能力。因此,分层铺设土工格栅可以有效的解决填挖交界地基非均匀沉降的问题,它可以为以后工程提供参考和借鉴。

Field Test of the Geogrid in the Foundation of Filling and Excavating

In order to analyze the effect of geogrids on the nonuniform settlement of the foundation,FWD deflection test,laying and laying of geogrids without laying the geogrids experiments was carried out in the Yan'an New Area integrated corridor project.The influence of backfill height on the bending basin and the influencing factors of the backfilling modulus of the foundation are discussed.It is proved that the stratified geogrid can not only improve the ability of resisting deformation,but also bring the soil into the whole horizontal transmission tension.Therefore,the laying of geogrid can effectively solve the problem of non-uniform settlement of the foundation of the filling and excavation,which can provide reference for future engineering.