頁籤選單縮合
題名 | 地下水位變化、靜態荷重及高鐵行進振動引致地層下陷之差異性=Differences of Land Subsidence Caused by Groundwater Level Variation, Static Load and Vibration on High-Speed Rail during Operation |
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作 者 | 林文勝; 劉振宇; 王泰典; 陳家豪; 周彥呂; 郭純伶; | 書刊名 | 地工技術 |
卷期 | 139 2014.03[民103.03] |
頁次 | 頁37-48 |
專輯 | 地盤沉陷與淹水 |
分類號 | 443.67 |
關鍵詞 | 超抽地下水; 地層下陷; 高鐵; Overpumping; Land subsidence; High-speed rail; |
語文 | 中文(Chinese) |
中文摘要 | 本研究利用Interbed模式及「黏土層間脫水理論」模式分別推求地下水位變化引致之主要及次要壓縮下陷量;Boussinesq垂向應力增量及Terzaghi壓密理論評估靜態荷重造成之地層應力變化及下陷量潛勢;建立動態分析數值模式模型分析高鐵行進振動可能誘發地層下陷。結果顯示,高鐵雲林沿線下陷嚴重之土庫地區,自民國2004至2010年間超抽地下水造成之累積下陷量可達40cm。至2012年,土庫地區因高鐵與78號快速道路跨交處工程及鄰近路堤填土之工程結構物荷重於土庫台78號快速道路跨交處之最大下陷量為1.60~6.68cm。高鐵行進振動引致之地層應力增量對地層下陷而言,應可忽略不予考慮。 |
英文摘要 | The land subsidence caused by over pumping of groundwater including primary consolidation and compression secondary which are considered by respectively the effective stress of Terzaghi using INTERBED model and the clay interlayer dehydration theory. The amounts of subsidence caused by the static weight are estimated by the vertical stress increment of Boussinesq method. And the other hand, the amounts of subsidence caused by the dynamic consolidation of the high-speed rail during operation are adopted the three-dimensional finite element model within the equation of damped vibration motion. The results of this analysis provide the quantitative amounts of the land subsidence due to the groundwater pumping, static weight and the operation of high-speed rail. From 2004 to 2010, the subsidence amount in Tuku caused by pumping groundwater are about 40 cm. For engineering structures due to loading at the intersection of high-speed rail and expressway 78 engineering, and adjacent embankment filling, the maximum amount of subsidence can be estimated in 2012 are about 1.60~6.68 cm. The subsidence caused by the vibration of the dynamic analysis can be neglected on the surface or deep layer. |
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