Shear Strength of Reinforced Geosynthetic Clay Liner
Shear Strength of Reinforced Geosynthetic Clay Liner
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DOI：
10.1061/(asce)0733-9410(1996)122:4(259
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发表时间：
1996-04
期刊：
影响因子：
--
通讯作者：
R. Gilbert;F. Fernandez;D. Horsfield
中科院分区：
文献类型：
--
作者：
R. Gilbert;F. Fernandez;D. Horsfield
通过直剪试验研究了加筋土工合成材料粘土衬砌在3.45 ~ 69.0kPa法向应力作用下的内部强度。与文献中报道的未加固GCL相比，聚丙烯加固增加了峰值内部强度;然而，由于加固失效，加固GCL表现出强度随位移的峰后降低。直接剪切试验也进行了评估增强GCL和其他土工合成材料之间的界面强度。注意到膨润土从GCL挤出进入界面，并可能降低界面强度。GCL与光滑土工膜或排水土工复合材料之间的峰值界面强度小于所有测试法向应力下的内部强度。然而，GCL和纹理土工膜之间的峰值界面强度是有限的峰值内部强度超过13.8千帕的正常应力。在这些较高的正应力下，由于钢筋失效，该界面的强度随位移出现峰后降低。
Direct shear tests are conducted to evaluate the internal strength of a reinforced geosynthetic clay liner (GCL) at normal stresses between 3.45 and 69.0 kPa. The polypropylene reinforcement increases the peak internal strength compared to that reported in the literature for unreinforced GCLs; however, the reinforced GCL exhibits a postpeak reduction in strength with displacement due to failure of the reinforcement. Direct shear tests are also conducted to evaluate the interface strength between the reinforced GCL and other geosynthetic materials. Extrusion of bentonite from the GCL into the interfaces is noticed and may reduce the interface strengths. Peak interface strengths between the GCL and a smooth geomembrane or a drainage geocomposite are less than the internal strength at all normal stresses tested. However, the peak interface strength between the GCL and a textured geomembrane is limited by the peak internal strength for normal stresses exceeding 13.8 kPa. Postpeak reductions in strength with displacement occur for this interface at these higher normal stresses due to reinforcement failure.