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題 名 | 山岳隧道軟弱地層開挖之個案分析=A Case Study of Tunnel Excavation in Soft Rock Ground |
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作 者 | 張文城; | 書刊名 | 地工技術 |
卷 期 | 59 1997.02[民86.02] |
頁 次 | 頁27-36 |
分類號 | 441.9 |
關鍵詞 | 坪林隧道; 金盈斷層; Pinglin tunnel; Chinyin fault; |
語 文 | 中文(Chinese) |
中文摘要 | 北宜高速公路坪林隧道全長約 12.9 公里,共分為三條坑道,其中兩主坑直徑約 13m,導坑直徑約 5m。 坪林隧道係由頭封端先以鑽炸法開挖約 850m,爾後再以全斷面隧道 鑽掘機開挖以貫通隧道。 在以鑽炸法開挖的路段中,最重要的地質構造為寬約 60m 之金盈 斷層,該斷層泥材料經挖開、解壓及吸水後極易膨脹瓦解,並可能有高膨脹壓力產生,因此 隧道開挖時,其開挖順序與支撐便需有特殊之考量,並輔以灌漿補強工作及提高預估變形量 ,以避免開挖後開挖面入侵設計線。此外有系統之監測作業,亦為開挖過程重要工作項目之 一。由監測結果顯示,開挖後抑拱噴凝土的儘速施作,以閉合隧道之支撐系統,為抑制隧道 變形較經濟而有效之措施。 |
英文摘要 | The Pinglin tunnel of Taipei-Ilan expressway, including two main tubes and one pilot tube, is approximately 12.9km in length. The diameter of the main tubes and pilot tube are approximately 13m and 5m respectively. The Pinglin tunnel was excavated approximately 850m with drilling and blasting method from the Tou-Cheng portal firstly. Tunnel boring machine method will be adopted to complete the remaining section of the tunnel. The Chinyin fault with 60m wide is the most important geological structure in the drilling and blasting section. The dialation behavior of the fault gouge material is very sensitive to the water, therefore the excavation sequence and support systems should be carefully studied. Some reinforced measures and more anticipated rock deformation also have been considered in order to avoid the excavated section intruding into the designed section. Systematic monitoring is also a very important task during the excavation. According to the monitoring results, the placing of the invert shotcrete to close the support system is the most effective and economic method to reduce the deformation of the rock mass after excavation. |
本系統中英文摘要資訊取自各篇刊載內容。