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題名 | 模擬水力填築板狀砂土之剪力特性=Shearing Properties of Simulated Hydraulic-Filled Sands with Flat Particles |
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作者 | 李建中; 鄭清江; | 書刊名 | 中國土木水利工程學刊 |
卷期 | 9:1 1997.03[民86.03] |
頁次 | 頁39-48 |
分類號 | 441.12 |
關鍵詞 | 水力填築; 板狀砂土; 剪力特性; 組構異向性; Hydraulic fill; Flat shaped sand; Shearing properties; Fabric anisotropy; |
語文 | 中文(Chinese) |
中文摘要 | 本研究運用程序模擬方式,以水力輸砂儀製作試驗用模擬試體,針對此種模擬試體沈積過程中之行為做詳細探討,最後並以沈積完成之試體,進行水力填築板狀砂土剪力特性之廣泛研究。結果顯示,以水力輸砂儀製作之模擬試體,其均勻性與可重複性均稱良好,具有適當之模擬效果。其穩定狀態線的斜率與濕搗法製作之結果相近似,惟在三軸軸向壓縮試驗時,相同孔隙比下前者之強度略高於後者。由三軸軸向伸張試驗之穩定狀態線,顯示其強度較三軸軸向壓縮試驗結果為低。此與組構異向排列有關,故此種板狀砂土經水力填築後形成之地盤,其工程上選用設計參數時,應對於組構異向性的影響加以考量。 |
英文摘要 | A sand-water mixture transportation device for preparing testing samples is developed. The process of deposition behavior is discussed in detail, and static and dynamic tests are performed to study the shearing properties of the hydraulic-filled sand with flat particles. The distribution of particles and density of the tested sample is uniform in general. Repeatability and similarity of the tested samples is satisfactory. The slopes of the steady state lines obtained from tests on hydraulic-filled sand specimens and from tests on wet-tamped sand specimens are the same. However, for triaxial comparession tests based on same void ratio the strength of the hydraulic-filled specimens appears to be higher. The steady state line obtained from extension tests indicates strength lower than that from compression tests. This is attributed to the influence of soil fabric and should be considered in selecting the design parameters. |
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