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題名 | Soil Movements Around a Tunnel in Soft Soils=軟土內隧道周圍土壤之變形 |
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作者 | 李崇正; 吳秉儒; 邱顯堯; Lee, Chung-jung; Wu, Bing-ru; Chiou, Shean-yau; |
期刊 | Proceedings of the National Science Council : Part A, Physical Science and Engineering |
出版日期 | 19990300 |
卷期 | 23:2 1999.03[民88.03] |
頁次 | 頁235-247 |
分類號 | 441.12 |
語文 | eng |
關鍵詞 | 軟土; 隧道; 周圍土壤變形; Collapse mechanism; Overload factor; Surface settlement trough; Subsurface settlement trough; Tunnel; |
中文摘要 | 軟土通隧引致周圍土壤變形,常導致鄰近結構受損。本文利用一系列離心模型試 驗探討位於軟土之淺隧道,在破壞前後周圍土壤之變形。文中詳述試驗流程,並將地表及地 下沈陷槽之試驗結果與現場觀測結果比較,兩者相當一致。深徑比在0.5-4間之淺隧道,破 壞時之過荷重因子介於上下限解之間。從上限解得到之破壞型態與試驗觀測結果一致。本文 分別建立地表及地下土層沈陷槽寬度參數及最大沈陷量與隧道深度及土壤漏失量之關係,可 供進行鄰房保護設計時使用。 |
英文摘要 | Tunnelling in soft soils may cause ground movements and damage to adjacent buildings and overlying facilities. Ground movements around a tunnel before and after collapse have been investigated by conducting a series of tests with centrifuge tunnel models. This paper briefly describes the test procedures undertaken and summarizes a comparison of test results and field measurements relevant to the analysis of the extent of surface and subsurface settlement troughs. The observed overload factor at collapse was well bounded by the theoretical upper bound and lower bound solutions for tunnels with cover-to-diameter ratios of from 0.5 to 4. The proposed collapse mechanism derived from the theoretical upper bound solution is consistent with that observed from the velocity fields of the model tests. The magnitude and extent of settlement troughs at different elevations under different values of ground loss for tunnels embedded at different depths are provided as well. It is suggested that these simple relationships can be usefully adopted by engineers for designing protective measures in buildings when considering the likely settlement of structures or substructures above a tunnel. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。