| dc.description.abstract | For many Fossil-fuel power stations, burning coal is the most used type to generate electricity because coal is cheaper than other material. Not only generating electricity, but burning coal also produced ash named coal ash. Because of environment demand, it is not allowed to transport ash to overseas. Thus it is used to transporting ash from thermal power plant to adjacent seashore by hydraulic filling and building ash ground. The large thermal power plant used ash ground to expanse plant area, but there are many earthquakes in Taiwan. Liquefaction can easily happened in ash with high fines. Therefore, they conducted sand compaction pile and gravel drain pile to improve ground in Taichung and Linkou. Consequently, the effective of compaction is not obvious for shallow ash ground and difficult to observe the influence of drain, and acknowledge of liquefaction characteristics of ash is insufficient. For these reasons, it is necessary to conduct modeling test.
This study presents centrifuge modeling tests designed to simulate the vibration response of improved ash ground. According to test results: (1) It’s no obvious difference between piles space 2.5 m and 3 m, no matter sand drain pile or gravel drain pile. (2) It’s easy for coal ash to be taken into gravel pile when liquefaction, resulting in drain gravel pile is ineffective. (3) It’s effective to keep coal ash away from gravel pile with filter, and to mitigate liquefaction of shallow coal ash ground.
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