頁籤選單縮合
題 名 | 土壤塑性對縮尺化級配未飽和礫石土力學性質之影響=Influence of Soil Plasticity on Mechanical Properties of Graded Partly Saturated Gravely Soils |
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作 者 | 褚炳麟; 李泰明; 許傳榮; 黃隆茂; | 書刊名 | 中國土木水利工程學刊 |
卷 期 | 10:4 1998.12[民87.12] |
頁 次 | 頁605-616 |
分類號 | 441.12 |
關鍵詞 | 塑性指數; 未飽和礫石土; 抗剪強度; 基質吸力; Plastic index; Partly saturated gravely soil; Shear strength; Matric suction; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究主要運用自行發展之部份飽和大型三軸試驗技術,以探討基質吸力對不同 塑性程度之級配礫石土,在抗剪強度和變形性方面之影響程度。試料之級配乃採用粒徑縮尺 法之觀念,使試體之最大粒徑縮減至 1",並將通過 #40 篩之土壤,分別以四種不同塑性指 數之細料取代,以製備四種具不同 PI 值之夯實礫石試體。 經由試驗及分析結果顯示,(1) 礫石土中所含細料之 PI 值愈大,其吸力潛能也愈大;(2) 吸力相同時,部份飽和試體之抗 剪強度及破壞應變皆隨 PI 值之增加而增加;但彈性模數則與 PI 成反比。(3) 以非線性迴 歸模式分析Φ�z值, 代入 Fredllund 之理論式,即可建立部份飽和礫石土抗剪強度及彈性 模數與基質吸力之關係式,且其相關係數相當高。 |
英文摘要 | A large scale triaxial testing apparatus is developed to evaluate both the shear strength and deformability behavior of partly saturated gravely soils under the application of matric suction. The concept of the parallel model is also applied to verifying the results obtained. In this study, field grain sizes for natural gravely deposit were scaled down to a maximum grain size of one inch. Four compacted specimens, of which the soil particles finer than No.40 sieve were replaced by those with different PI values, have been tested. Experimental results show that (1)the higher PI value of gravely soil, the greater the matric potential; (2)if the suction remains constant, the shear strength, as well as the failure strain of the specimen, increases with higher PI values, while Young's modulus becomes smaller;(3) by substitution of Φ�z values, derived from the nonlinar regression into the extended theory proposed by Fredlund, two relationships can be established between the shear strength and martic suction and between Young's modulus and martic suction, with relatively high correlation coefficient. |
本系統中英文摘要資訊取自各篇刊載內容。