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A Study on Protection Measure for Water Level Fluctuation and Overflow Conditions in Earth-filled Embankment by Centrifuge Model Tests
International Journal of Civil Engineering ( IF 1.7 ) Pub Date : 2021-06-02 , DOI: 10.1007/s40999-021-00636-6
Jihuan Jin , Bibek Tamang , Seungjoo Lee , Joon Heo , Sungyong Park , Eun-Sang Im , Yongseong Kim

This study analyzes the behaviors of the Kyeryong embankment dam during various rates, i.e., quick and slow rate, of water level fluctuation using geotechnical centrifuge experiments that simulate the real scale stress conditions and water level fluctuation conditions of the real field. The collapse behavior of the embankment is also evaluated, in this study, by simulating overflow conditions during torrential downpours due to climate change. The embankment models are constructed at a reduced scale of 1:50; the protected and unprotected embankment crest conditions are replicated, and pore pressure gauges, displacement sensors (linear variable differential transformer LVDT) are installed to analyze the seepage and overtopping behaviors of the embankment by carrying out geotechnical centrifuge tests. The centrifuge test results manifest that repetitive and continuous fluctuation of water level is a major factor that causes embankment deformation through the accumulation of pore water pressure and settlement. In addition, it is confirmed that the installation of protection measures along with spillway helps to prevent the scouring of soil particles in the embankment downstream slope .



中文翻译:

离心机模型试验对土石坝水位涨落及溢流情况的防护措施研究

本研究采用岩土离心试验,模拟真实场地的真实尺度应力条件和水位波动条件,分析了 Kyeryong 堤坝在水位波动的不同速率,即快和慢速率下的行为。在这项研究中,还通过模拟气候变化造成的倾盆大雨期间的溢流条件来评估路堤的坍塌行为。路堤模型以 1:50 的缩小比例建造;复制受保护和未受保护的路堤坝顶条件,安装孔隙压力计、位移传感器(线性可变差动变压器LVDT),通过进行岩土离心试验来分析路堤的渗流和越顶行为。离心机试验结果表明,水位的重复连续波动是导致路堤孔隙水压力累积和沉降变形的主要因素。此外,确认沿溢洪道安装防护措施有助于防止路堤下游斜坡土壤颗粒冲刷。

更新日期:2021-06-02
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