In this study, the downstream slope of a dam impounding the upper reservoir of Lam Ta Khong (LTK) hydroelectric energy storage in Thailand was found to slide at a higher pace during the rainy season. After a thorough site investigation, laboratory tests, and numerical modeling to identify the main cause of the movement, it was found that as rainfall infiltrated the upper soil layer, the claystone of the downstream slope deteriorated when in contact with the water. As a remedial measure, 174,750 m² of geosynthetic clay liner (GCL) was used to cover the entire downstream slope of the dam, and proved to be an effective and economical solution for reducing the ongoing movement. The GCL included a textured high-density polyethylene (HDPE) layer for improving the resistance and minimizing the slippage at the interface between the GCL and underlying rock. Before the dam's remediation, the settlement point demonstrated a movement of nearly 0.1 m/year. In contrast, after the placement of the GCL, almost all settlement points moved less than 0.1 m for a recorded period of more than 4 years.

在这项研究中，发现泰国林塔孔 (LTK) 水电储能上部水库蓄水的大坝下游斜坡在雨季以更快的速度下滑。经过彻底的现场调查、实验室测试和数值模拟以确定运动的主要原因后，发现随着降雨渗入上层土层，下游斜坡的粘土岩在与水接触时恶化。作为补救措施，174,750 m ²土工合成粘土衬垫 (GCL) 用于覆盖大坝的整个下游斜坡，并被证明是减少正在进行的运动的有效且经济的解决方案。GCL 包括有纹理的高密度聚乙烯 (HDPE) 层，用于提高阻力并最大程度地减少 GCL 与下伏岩石之间界面处的滑移。在大坝修复前，沉降点的移动量接近 0.1 m/年。相比之下，在 GCL 放置后，几乎所有定居点的移动距离都小于 0.1 m，记录时间超过 4 年。