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格栅反包生态袋挡土面层界面特性试验研究

DOI: 10.3969/j.issn.1674-0696.2014.02.15, PP. 68-71

Keywords: 岩土工程,经编土工格栅,反包拉拔试验,平均摩擦系数,geotechnicalengineering,warpknittinggeogrid,reversedrawingtest,averagefrictioncoefficient

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Abstract:

:?通过袋装黏土的袋-袋直剪试验和对两种相同网格尺寸不同强度经编涤纶土工格栅材料反包生态袋(袋装黏土)挡土结构面层进行拉拔试验,研究了不同格栅反包生态袋挡土面层的界面特性。试验结果表明:袋装黏土生态袋界面之间的剪切摩擦强度和加筋格栅反包生态袋的拉拔试验强度均随法向应力的增加而增加,强度包线均是一条直线;加筋格栅反包生态袋的试验强度比袋装黏土生态袋界面之间的剪切摩擦强度要高,反包拉拔试验的平均摩擦系数和黏聚力比袋装黏土生态袋直剪试验大,但是摩擦角大小却相反,而拉拔强度-位移曲线并不一定出现峰值;强格栅反包拉拔试验强度比弱格栅的拉拔试验强度高,无论是黏聚力、摩擦角还是摩擦系数指标均是格栅试验组比格栅试验组大。在工程中,尽量选择强度大的格栅有利于加筋挡土结构面层的稳定。

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