Performance assessment of deformation behaviour of landfill barriers at the onset of differential settlement
Performance assessment of deformation behaviour of landfill barriers at the onset of differential settlement
复制标题
差异沉降开始时垃圾填埋场屏障变形行为的性能评估
DOI：
10.1504/ijee.2010.029833
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
B. Viswanadham
中科院分区：
文献类型：
--
作者：
S. Rajesh;B. Viswanadham
本研究的重点是不同沉降作用下覆盖系统的各种不透水屏障的性能。各种不透水屏障，即压实粘土衬垫（CCL）、土工合成粘土衬垫（GCL）和纤维增强粘土衬垫（FRCL），在使用液压活板门系统的离心机中人为地进行不均匀沉降。与未增强的粘土衬里相比，用离散且随机分布的纤维增强的粘土衬里观察到水突破的明显延迟。 0.6 m 厚的粘土衬垫的最大变形极限水平为 0.068。相比之下，对于相同厚度的 FRCL，观察到该值发生在 0.078。即使在引入0.125的失真度后，GCL也没有表现出任何不适。对于测试的不透水屏障类型，GCL 承受不均匀沉降的能力优于 CCL。
The present study focuses on the performance of various impervious barriers of cover systems subjected to differential settlements. Various impervious barriers, namely Compacted Clay Liner (CCL), Geosynthetic Clay Liner (GCL) and Fibre Reinforced Clay Liner (FRCL) were subjected to differential settlements artificially in a centrifuge using hydraulic trap-door system. Distinct delay in water breakthrough was observed for a clay liner reinforced with discrete and randomly distributed fibres when compared to an un-reinforced clay liner. Limiting maximum distortion level of 0.068 was registered for a 0.6 m thick clay liner. In comparison, this was observed to occur at 0.078 for a FRCL of identical thickness. Even after inducing distortion level of 0.125, GCL has not shown any distress. For the type of impervious barriers tested, the ability of GCLs to withstand differential settlement was found to be superior to that of CCLs.