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題 名 | 集集大地震基礎震災情況及復建對策=Chi-Chi Earthquake Induced Foundation Failures and the Remedial Measures |
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作 者 | 廖洪鈞; 陳堯中; | 書刊名 | 地工技術 |
卷 期 | 77 2000.02[民89.02] |
頁 次 | 頁77-86 |
分類號 | 351.249232 |
關鍵詞 | 集集大地震; 基礎震災; 土壤液化; 復建對策; Chi-Chi earthquake; Foundation failure; Liquefaction; Remedial measure; |
語 文 | 中文(Chinese) |
中文摘要 | 本文主要是針對921集集大地震之基礎震災調查結果加以探討,並就部分基礎破壞形式,提出重建對策。基本上,集集大地震對結構物之破壞,主要是集中在上部結構。對下部基礎的損害,並不嚴重。經對主要震災區之19個鄉鎮的457件基礎破壞案例調查後,發現計有267件(58%)屬基礎與上部結構之界面(如柱腳)破壞,123件(27%)屬斷層引致之基礎隆起破壞,67件(15%)屬土壤液化引致之基礎破壞。離震央較遠,但有斷層經過的地區,基礎破壞案例都集中在斷層附近。但隨著與震央距離之靠近,則除了斷層因素外,地震力對基礎的破壞案例也愈多。至於土壤液化對基礎所造成的破壞,因地區集中,規模不大,並未造成大規模的基礎破壞。此外,文中也就可能會發生液化或已經發生液化地區之建築物基礎補強和修復工作,建議以灌漿固化土壤的方式或是基礎托底之方式來進行,惟選用灌漿材料時需注意其在土壤中之耐久性,托底用之基樁要能承受土壤液化時之動態側向力。 |
英文摘要 | This paper is aimed to evaluate the investigation results of the Chi-Chi earthquake induced foundation failures and to propose some possible remedial measures for the liquefaction resulted foundation failure. Basically, most of the earthquake induced damages were on the upper structures. The damages to the foundation were minor. Totally, 19 towns and cities were investigated and 457 foundation failure cases were reported. Among them, 267 cases (581/o) were related to the interface failure between upper structure and foundation; 123 cases (271/o) were subjected to the fault induced surface up-heave; and 67 cases (15'/o) were caused by the subsoil liquefaction. For areas far from the epicenter but with the fault passing through, the foundation failures were mainly caused by the surface up-heave and were concentrated along the fault. For area closer to the epicenter, not only the fault induced surface up-heave but also the earthquake force are the major causes of foundation failure. As a result, the distribution of the foundation failure spread wider. Since the soil liquefaction was only occurred in certain areas and the scale was small, the liquefaction induced foundation failure was not significant. To improve the ground condition against liquefaction for the areas had been attacked or will possibly be attacked by the liquefaction, both the grouting method and the underpinning method are recommended here considering their workability and effectiveness. But the long term durability of grouting material and the resistance against the lateral load of underpinning piles should be carefully evaluated. |
本系統中英文摘要資訊取自各篇刊載內容。