土工格栅加筋粉煤灰堤坝的室内模拟试验研究

Study of Model Tests on Powder Ash Embankments Reinforced by Geogrids

通过室内小比例尺模型试验,模拟了双向土工格栅在粉煤灰堤坝中相同边坡坡比下,未加筋与加1层、2层筋等不同结构形式在坡顶荷载作用下坡顶沉降和边坡的变形规律,研究了土工格栅加筋参数对堤坝边坡结构性能的影响。试验结果表明,加筋能大幅提高堤坝的稳定性和承载能力,对工程实践具有一定的指导意义。

With two small-scaled test models, the structural performance of both a reinforced structure and an un-reinforced structure with the same slope angles is studied, with the double oriented geo-grids; and three different reinforcement layers, zero, one and two layers respectively added to them. Under a strip footing load near the slope crest, the deformations of slopes and geo-grids are simulated. The coefficients of reinforcement affecting the structural performance of the embankment are explored; and the mechanical characteristics of geo-grids in the powder ash embankments are worked out. It is proved that geo-grids will improve the stability and the capability of the slope.