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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/24256

Title: 曾文越引隧道工程水文地質之調查與分析評估
Authors: 楊豐榮;顧承宇;譚志豪;許世孟;鍾明劍
Contributors: NTOU:Department of Harbor and River Engineering
Keywords: 隧道工程;水文地質調查;隧道湧水;地下水;三維數值分析
Tunneling;hydrogeological investigation;tunnel inflow;groundwater;3-D numerical modeling
Date: 2007-06
Issue Date: 2011-10-20T08:10:54Z
Publisher: 地工技術
Abstract: 摘要:台灣地區因雨量充沛,且位於歐亞板塊與菲律賓板塊交接處,活躍的造山運動造成岩層之破碎度高而節理發達,故地表水易沿地質弱面滲入岩層,以致岩盤中之地下水儲量豐富。近年來山岳隧道之開挖經驗顯示,穿過高山地形之長隧道因水文地質條件十分複雜,隧道施工時除因大量湧水造成施工困難外,亦常因地下水流失引發鄰近區域環境水文地質之爭議。本文以曾文越引隧道工程為例,分別針對:(1) 山岳隧道工程之水文地質現地詴驗技術、(2) 結合地形、地層、地質構造及地下水文條件之水文地質概念模型建立、(3) 區域三維水文地質數值模式之分析、(4) 模式率定與驗證、與(5) 隧道開挖湧水對鄰近區域水文地質環境影響之分析等項目詳加探討。並期藉此降低隧道於施工時所可能遭遇之風隩,以釐清隧道施工與營運對於周遭環境水文地質之可能影響。
Taiwan is located at an active mountain belt created by the oblique collision between the northern Luzon arc and the Asiancontinental margin in which fissures, joints, beddings, and even faults prevail in most of mountainous areas. While existing jointsand fractures provide ideal conduits for water to flow, large volumes of groundwater are stored in aquifers in which water inflowsare often encountered during tunneling. Recently, several case studies of tunneling in Taiwan demonstrate that the water inflow isthe major cause for the failure. As a consequence of groundwater loss, the problem of environmental arguments may also arise. Inthis paper, a case study of Tsengwen reservoir transbasin diversion tunnel with emphasis on the topics of hydrogeology waspresented. Several major issues, including (1) the hydrogeological field testing technique, (2) the establishment of conceptual model,(3) the modeling of three-dimensional groundwater flow, (4) the calibration and verification of the conceptual model, (5) theprediction of tunnel inflow, were introduced. The application of each approach was described in details. It is believed that thepredicted results may provide useful information for reducing the uncertainties of tunnel inflow and may also clarify the impact ofenvironment issues
Relation: 112, pp.69-80
URI: http://ntour.ntou.edu.tw/handle/987654321/24256
Appears in Collections:[河海工程學系] 期刊論文

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