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題 名 | 傾斜管線在砂土中之阻抗力=Soil Resistance of Obliquely Loaded Pipelines |
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作 者 | 徐登文; 李方偉; | 書刊名 | 中國土木水利工程學刊 |
卷 期 | 9:2 1997.06[民86.06] |
頁 次 | 頁231-238 |
分類號 | 441.12 |
關鍵詞 | 管線; 砂土阻抗力; 傾斜荷重; Pipeline; Soil resistance; Inclined loading; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究探討管線在不同傾斜角度荷重及移動速率下於緊砂中阻抗力之行為。由一 系列之實驗結果與所提之理論預估值相比較,顯示以內蘊型極限平衡之理論模式及試誤楔形 法分析所得之預估值可作為預估傾斜管線之極限土壤阻抗力值。管線在砂土內之極限傾斜土 壤阻抗力隨其傾斜角度增加而增加,而其間變化量最大之處則發生於傾斜角度介於 45 °∼ 90 °間。 同時又發現極限傾斜土壤阻抗力並不一定隨管線移動速率增加而增加,在傾斜角 度為 70 °∼ 90 °時此傾斜阻抗力隨速率之增加而減少, 但在速率達到約在 V=7.62x10 cm / sec ∼ 1.52x10 �� cm / sec 之結果極為接近。但管線傾斜角度較小時起伏現象並不 明顯,傾斜阻抗力大致隨速率之增加而緩慢增加。 |
英文摘要 | The aim of this research is to determine the ultimate soil resistance of pipelines in dense sand subjected to inclined loads. Experimental tests were conducted in a prefabricated large scale drag device with dimensions of 1.83 mx1.83mx1.22m for studying the velocity effect on the soil resis-tance of the pipelines. Results indicate that the ultimate soil resistance of the pipeline increases with the inclination angle of pipeline movements. Most of the increase in the resistance is associated with the oblique angles in the range betwen 45 ° and 90 °. The implicit limit equilibrium model with a trial wedge predicts successfuly the ultimate soil resistance of the pipeline. The resistance gradually decreases with the pipe velocity to a minimum at the velocity of 5.08x10 cm / sec, and then continues to increase. |
本系統中英文摘要資訊取自各篇刊載內容。