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題 名 | 應力場對隧道交叉段力學行為之影響=Effects of Stress Field on the Mechanical Behavior of Tunnel Intersection |
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作 者 | 游步上; 陳堯中; 張慎言; | 書刊名 | 中國土木水利工程學刊 |
卷 期 | 11:1 1999.03[民88.03] |
頁 次 | 頁189-196 |
分類號 | 441.9 |
關鍵詞 | 隧道交叉段; 數值分析; 塑性區; 應力集中; Tunnel intersection; Numerical analysis; Plastic zone; Stress concentration; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究以 FLAC3D 三向度程式模擬隧道交叉段之開挖, 探討在不同的應力場條件 下,聯絡橫坑開挖對主隧道變形及襯砌應力之影響,並探討其影響範圍,做為隧道交叉段支 撐補強之參考。研究結果顯示,聯絡橫坑開挖對主隧道交叉段力學行為之影響機制相當複雜 ,主要受開挖前主隧道塑性區之分佈情況及開挖後側向束制解除兩項機制的交互影響。在本 研究之假設條件下,聯絡橫坑開挖對主隧道襯砌應力之影響範圍約 1.5 倍主隧道直徑。 |
英文摘要 | The excavation of tunnel intersectin is simulated by a three-dimensional numerical code FLAC-3D in this paper. The influence of excavating crossing tunnel on the deformations and lining stresses of main tunnel are studied under different stress fields. The influence zone of main tunnel is also investigated to determine the requirement of support reinforcement. The results show that excavating crossing tunnel has complex influence on the mechanical behavior of main tunnel. The distribution of plastic zone of the main tunnel before excavation and the release of lateral restraint after excavation of crossing tunnel are two major factors that result in the complex behavior. Under the conditions studied in this paper, the influence zone due to excavation of crossing tunnel is about 1.5 times of the main tunnel diameter. |
本系統中英文摘要資訊取自各篇刊載內容。