土工格栅加筋土体强度形成机理研究

Study on geogrid reinforcement strength mechanism

从试验研究和理论分析两方面推导了土工格栅加筋土体的强度形成机理。研究表明:当土体致密,加筋材料与土体结合紧密,且筋材的极限抗拉强度较低时,筋材发生拉断破坏,与加筋前相比,加筋复合体的内摩擦角不变,内聚力有较大的提高;而当土体较疏松,筋材的抗拉强度较高时,筋材发生摩擦型(拔出)破坏,加筋复合体的内聚力变化不大,而内摩擦角有较大的提高。

The strength mechanism of geogrid reinforcement soil.was investigated by theoretical derivation and experimental verification. The stusdy showed that the low-strength geogrids in the reinforcement compact soil will be tension fracture, compare to original soil, its internal friction angel is invariable and its cohesion is improved remarkably. On the other hand, the high-strength geogrids will be pulled out from the reinforcement loose soil, the internal cohesion of geogrid reinforcement soil is invariable and its friction angle is improved remarkably.