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題 名 | RIDO程式運用於大面積開挖基地之案例探討=Case Study of RIDO Analysis in Large Area Excavation |
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作 者 | 張瑞仁; 陳冠宏; 王建智; | 書刊名 | 地工技術 |
卷 期 | 124 2010.06[民99.06] |
頁 次 | 頁27-32 |
分類號 | 441.13 |
關鍵詞 | 深開挖; RIDO; Excavation; |
語 文 | 中文(Chinese) |
中文摘要 | RIDO程式為國內深開挖工程設計常用軟體,採取簡化的平面應變模式模擬擋土壁體受力及變位。就大面積開挖基地最長邊界,開挖時的變位模式接近平面應變狀況,運用RIDO程式應有良好成果。本文所討論的大面積開挖案例,基地呈長方形,邊長超過75m;但實測擋土壁體變位超過RIDO分析結果約55%,以致開挖過程中的風險增高。初步探討此一現象成因,可能是因為每階段開挖範圍廣,影響開挖區被動土壓力特性所致。故此,進行類似基地開挖分析,在未能完全確認土層受開挖解壓影響程度,難以調整分析參數時,建議宜採用扶壁或地中壁等類措施,以期控制壁體變位維護開挖安全。 |
英文摘要 | RIDO program has been widely used for excavation analysis in Taiwan. This kind of programs adopts simplified plane strain model to simulate excavation procedure and evaluate stress and displacement of retaining walls. For a large area excavation site, displacement behavior of retaining wall can be estimated by plane strain. There should be satisfactory analysis results using RIDO in large area excavation cases. This paper discussed one large excavation site with rectangular shape and the length of slurry wall is over 75m. But monitored displacement of slurry wall is larger than calculated value by RIDO about 55% . This result introduces unexpected risk in this excavation. From preliminary study, reducution of soil passive stress due to large amount of overburden removed in excavated section may be main cause of larger displacement. For large area excavation cases, if designer can’t evaluate reduction effect of soil lateral stress from excavation, butress units are suggested for control of displaement and safety. |
本系統中英文摘要資訊取自各篇刊載內容。