利用連續壁防治土壤液化之探討

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/601

Title:	利用連續壁防治土壤液化之探討
Authors:	陳文浩;Wen-Hau Chen
Contributors:	土木工程研究所
Keywords:	地盤改良工法;土壤液化;連續壁;ground improvement;diaphragm wall
Date:	2001-07-16
Issue Date:	2009-09-18 17:08:33 (UTC+8)
Publisher:	國立中央大學圖書館
Abstract:	本研究使用以非線性之有效應力法為架構所發展之三維有限元素程式，進行以地下連續壁降低土壤液化潛能之研究。首先就元素分割方式、地震輸入維度、滲透係數及連續壁外土壤的影響分別進行討論，以作為案例分析的使用參數。接著討論連續壁之圍束範圍、厚度及貫入深度等對於防治液化的有效性。最後再藉由不同的地震來比較地震延時對結果的影響。研究結果顯示，三維的問題研究應使用三維之地震力輸入較為適合。使用連續壁作為具液化潛能之地盤改良對策工法時，連續壁圍束之範圍越小，埋置深度越深，其效果越佳。連續壁圍束區為5m * 5m，並至少貫入非液化層時，其效果已足為實際之使用。地震延時的選用對於分析液化的結果影響甚鉅，最好能夠選用一完整的時間歷時來做分析。 In this thesis, a 3D finite element model based on nonlinear effective stress method is applied to investigate the effectiveness of diaphragm wall in reducing the potential of soil liquefaction induced by earthquakes. The influence of the element size, the dimensionality of input motion, the coefficient of permeability and the soil outside the diaphragm wall is investigated first to set up the parametric values for case studies. It was found that in three-dimensional analysis the 3D input motion should be used and the duration of earthquake motion influence the results significantly. It was also found when the diaphragm wall is adopted as the countermeasure for liquefaction of sandy ground, its effectiveness increases as the confining area is smaller and the wall is penetrated into non-liquefied layer.
Appears in Collections:	[Graduate Institute of Civil Engineering] Electronic Thesis & Dissertation

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