Study on the Land Subsidence Causes and Control Measures for Central and Southern Section of Taiwan High Speed Rail

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Title:	Study on the Land Subsidence Causes and Control Measures for Central and Southern Section of Taiwan High Speed Rail
Authors:	蕭炎泉 Shiau, Yan-Chyuan
Contributors:	營建管理學系 Construction Management
Keywords:	高速鐵路;地層下陷;防範措施 Taiwan High Speed Rail;Land Subsidence;Control Measures
Date:	2012
Issue Date:	2014-06-27 00:58:57 (UTC+8)
Abstract:	台灣高鐵自2000年動工興建至2007年營運通車，給台灣帶來南北交通運輸極大便利。然經921地震後，由於中南部地區超抽地下水引發地層下陷，導致高鐵橋墩與橋墩之間的差異沉陷日趨惡化，恐危及高鐵結構安全。本研究將探討其原因，主要為高鐵路線經濁水溪至曾文溪流域路段地質結構以砂岩、頁岩為主、抗震力不足，容易液化下陷危及橋柱結構安全。地層下陷除了地震斷層釋出能量之破壞力不可抗拒外，超抽地下水、水土保持不良、土石流衝擊等皆為關鍵因素。荷載沉陷進行監測、管制抽取地下水井、擴大種樹造林面積、規劃土地防護管理、加強橋柱固樁 Taiwan High Speed Rail (THSR) began the construction from 2000 and completed the project in 2007 which provides a great convenience for Taiwan's north-south transportation. However, central and southern section of THSR has serious land subsidence that wil
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