Compressive Performance of Geogrid-reinforced Granular Soil

摘要

A series of unconfined compression tests were conducted in laboratory to investigate the compressive behavior of geogrid-reinforced granular soil. Samples, each varying either in the reinforcement spacing (5) or the relative compaction of the granular soil (K), were prepared with S of 2.5 cm, 3 cm, 3.75 cm, 5 cm or 7.5 cm and K of 88 %, 92 %, or 96 % respectively. Based on a detail analysis of the effect of S and K on the compressive stress-strain response, the following conclusions were obtained: (1) the compressive strength increased either with the increase of K or with the decrease of S, but there was an optimum match of K with S, which leading an expected reinforcement benefit (enough compressive strength at a permissible strain) economically; (2) geogrid-reinforced granular soil had a higher compressive strength but a much more lower failure strain compared to geotextile-reinforced granular soil.