水化状态对含针刺GCL复合衬里抗剪强度的影响分析

发布时间：2018-05-26 00:10

本文选题：针刺GCL + 单剪　；参考：《岩土工程学报》2017年S1期

【摘要】：针刺GCL和HDPE土工膜(GM)在防渗工程中应用广泛,含多层界面的复合衬里整体抗剪强度是边坡稳定性分析的关键。介绍了含针刺GCL复合衬里的大单剪试验方法,并且对比分析了针刺GCL初始状态分别为干燥和完全水化两种情况下的复合衬里抗剪强度。结果表明,复合衬里的剪切破坏不会发生在干燥针刺GCL内部界面,而GCL干燥状态下的复合衬里单剪强度未必高于GCL完全水化状态下的复合衬里单剪强度。结合含GCL复合衬里的剪切破坏机理,阐述了针刺GCL的水化状态对复合衬里抗剪强度的影响。含GCL复合衬里在不同水化状态下的界面滑移稳定性都应引起工程人员的重视。
[Abstract]:Acupuncture GCL and HDPE geomembrane are widely used in seepage control engineering. The overall shear strength of composite lining with multi-layer interface is the key of slope stability analysis. This paper introduces the large single shear test method of GCL composite lining with acupuncture, and compares and analyzes the shear strength of the composite lining under the initial condition of dry and completely hydrated GCL. The results show that the shear failure of the composite lining does not occur at the internal interface of the dry needle pierced GCL, but the single shear strength of the composite liner in the GCL drying state is not necessarily higher than that in the fully hydrated GCL state. Combined with the shear failure mechanism of composite lining containing GCL, the effect of hydration state of GCL on the shear strength of composite lining was discussed. The interface slip stability of composite lining containing GCL under different hydration conditions should be paid more attention to by engineers.
【作者单位】：南昌大学建筑工程学院;岩土力学与堤坝工程教育部重点实验室(河海大学);江西交通职业技术学院建筑工程系;
【基金】：江西省青年科学基金项目(20161BAB216115) 岩土力学与堤坝工程教育部重点实验室开放基金项目(GH201404) 江西省教育厅科学技术研究项目(GJJ150072)
【分类号】：TU41

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