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頁籤選單縮合
題 名 | 乾砂承受動力夯擊時之應力分佈=Stress Distribution of Dry Sand Stratum During Dynamic Compaction |
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作 者 | 陳景文; 廖哲民; | 書刊名 | 中國土木水利工程學刊 |
卷 期 | 11:2 1999.06[民88.06] |
頁 次 | 頁267-277 |
分類號 | 441.2 |
關鍵詞 | 動力夯擊試驗; 應力分佈; 改良深度; Dynamic compacting test; Stress distribution; Depth of improvement; |
語 文 | 中文(Chinese) |
中文摘要 | 本文以方形土槽夯擊試驗,求出在不同動力夯擊能量作用下,夯擊能量於砂土層之分佈形狀及有效影響範圍;同時並探討採用動力夯擊工法對砂土層施工時,其各項夯擊參數對改良深度之影響。經分析結果顯示:(1)於夯擊點正下方之垂直動應力遠大於載重區域旁側之垂直動應力,集中因子隨土層深度有減小之趨勢,但受相對密度及夯錘質量之影響不明顯;(2)相對密度較大的砂土層,其承受有效加固土層之能量較少;(3)垂直動應力為10kPa視為夯擊能量的分佈範圍,其形狀呈長橢圓曲線;(4)隨著表面動應力之加大,土層受夯擊區域之體積成正比率增加。 |
英文摘要 | This paper presents a study on the attenuation distribution of stresses on dry sand stratum. The falling hammers impacting on the sand generate dynamic stresses which attenuate away from the point of impact. The model tests are performed using a container with dry sand. The test results can be drawn as: (1) The factor of concentration decreases with the depth of the stratum and less influenced by the relative density of sand. (2) The impact energy can transfer farther on sand strata with larger relative density. (3) By setting the effective vertical dynamic stress as 10kPa, the shape of vertical dynamic stress distribution on the stratum appears as an ellipse instead. (4) The volume of the soil stratum influenced by the impact increases with the increasing magnitude of the dynamic stress on the soil surface. |
本系統中英文摘要資訊取自各篇刊載內容。