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題 名 | 軟弱夾層於連續壁槽溝開挖之穩定性=Stability of Weak Sandwiched Sublayer in Diaphragm Wall Trenching |
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作 者 | 蔡錦松; 張家齊; | 書刊名 | 高苑學報 |
卷 期 | 7:1 1998.02[民87.02] |
頁 次 | 頁197-202 |
分類號 | 441.12 |
關鍵詞 | 連續壁; 塑性流; 軟弱夾層; Diaphragm wall; Plastic flow theory; Weak sandwiched sublayer; |
語 文 | 中文(Chinese) |
中文摘要 | 軟弱夾層的擠出破壞,是回填新生地進行地下連續壁槽溝開挖時,經常遇上 的施工困難。本文利用塑性流理論,針對具有軟弱黏土夾層之土壤,進行槽溝開 挖時之槽溝壁面穩定性進行分析探討,並配合工地實際案例加以驗證。研究結果 顯示,軟弱夾層在平衡狀態時,上方之垂直應力分佈係由遠處向槽溝壁面方向遞 減。且夾層黏土自身的剪力強度與穩定液壓、地下水位等,亦為影響軟弱夾層重 要影響因素。結論提出一個簡單公式,並由現場情況驗證合理。 |
英文摘要 | Squeezing out of weak sandwiched-sediment soil is a common problem encountered in diaphragin wall trench excavation at newly filled land. Through an approach based on the classic plastic flow theory, the present study modifies the theoretical solution and proposes a simplified formula which can be easily used in practice to evaluate the stability of the trench wall cut in the ground with weak sandwiched sublayer. A chosen case study is presented to show the validity of the proposed formula. The study indicates that the vertical stress upon the weak layer is decreasing to the open end from a uniformly distributed condition. Factors needed to be considered for the stability of the weak sublayer include at least the shear strength of the sandwiched soil, the slurry pressurre in the trench and the groundwater level during excavation. |
本系統中英文摘要資訊取自各篇刊載內容。