頁籤選單縮合
題名 | 考慮粘土小應變行為之深開挖分析=Analysis of Deep Excavation with Consideration of Small Strain Behavior of Clay |
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作者 | 謝百鈎; 龔東慶; 歐章煜; | 書刊名 | 中國土木水利工程學刊 |
卷期 | 15:3 2003.09[民92.09] |
頁次 | 頁487-496 |
分類號 | 441.13 |
關鍵詞 | 深開挖; 粘土; 小應變; 劣化; Deep excavation; Clay; Small strain; Degradation; |
語文 | 中文(Chinese) |
中文摘要 | 根據許多文獻的研究顯示,粘土不排水條件下,小應變時具有相當高的彈性模數,而且彈性模數具有隨應力水平增加而衰減之劣化行為。本研究首先將高精度非接觸位移感測器 (proximeter) 安裝於三軸儀器中,然後對臺北粉土質粘土進行一系列的三軸不排水壓縮試驗,量測小應變 (10 3%) 時之彈性模數,再將小應變之彈性模數及劣化行為應用於深開挖之有限元素法分析中,並對臺北盆地二個深開挖案例進行分析,分析結果顯示:考慮粘土小應變及劣化行為時,除了壁體側向位移可獲得良好的預測外,在地表沉陷方面,亦提供合理的預測結果。 |
英文摘要 | According to the references, clays possess the rather high-undrained elastic modulus at small strains and modulus degrades with the increase of the stress level. This study first set up the height-resolution instrument, proximeter, into the triaxial apparatus and carried out a series of undrained triaxial tests to obtain the elasticity modulus of the Taipei silty clay at small strain (10 3%). Then this paper applied the stress-strain model with the high elastic modulus at small strain and the degradation behavior considered to the finite element method to analyze the behavior of two excavation cases in Taipei basin. The results show that more reasonable predictions on ground surface settlement can be achieved in addition to the good predictions of the lateral deflections of the retaining wall. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。