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題名 | 以滑動分析法探討異向性粘土中深開挖底部抗隆起之安全係數=A Study on Factor of Safety Against Basal Heave in Anisotropic Clay Using Slip Surface Method |
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作者 | 蘇世豐; 廖洪鈞; 林耀煌; Su, S. F.; Liao, H. J.; Lin, Y. H.; |
期刊 | 中國土木水利工程學刊 |
出版日期 | 19990600 |
卷期 | 11:2 1999.06[民88.06] |
頁次 | 頁259-266 |
分類號 | 441.13 |
語文 | chi |
關鍵詞 | 底部隆起; 深開挖; 粘土; 強度異向性; Basal heave; Deep excavation; Clay; Strength anisotropy; |
中文摘要 | 滑動破壞分析法係國內最廣泛使用之開挖底部抗隆起分析法,然而這種分析法雖然可以考慮擋土壁貫入深度之影響,但卻無法將粘土之強度異向性和非齊次性(即強度隨深度而增加)等特質納入解析中,因此為使得分析方法更能反應實際的土壤性質,本研究乃利用一個可以考慮沈積軟弱粘土之強度異向性與非齊次性的異向性強度準則,並將它與國內慣用之滑動破壞分析法相結合,進而建立一個較週全的開挖底部穩定分析法。經與採用連續壁及內撐系統之波士頓深開挖數值分析結果和臺北市的隆起破壞案例比較後,可證實本文建議分析法的適用性。 |
英文摘要 | The slip surface method is by far the most commonly used method for analyzing the factor of safety against basal heave of deep excavations in Taiwan. Although this method can take into account the influence of wall depth, it does not account for the influence of inclination of slip surface on the shear strength. In order to study the effects of soil strength anisotropy and non-homogeneity (considering the fact that the soil strength increases with depth) on the calculated result, an anisotropic strength criterion is adopted here. After combining this strength criterion with the mechanism of the slip surface method, a modified slip surface method can be established. The suitability of the proposed method for analyzing the base stability of deep excavations is verified by comparing with the numberical study results of deep excavations in Boston and a base failure case in Taipei. All the cases quoted in this paper are located in soft clays and supported with internal braces and concrete diaphragm walls. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。