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研究生:林依汎
論文名稱:排水帶對土壤改良的探討
論文名稱(外文):A Study on Soil Stabilization by Using Prefabricated Vertical Drain
指導教授:陳廣祥陳廣祥引用關係
學位類別:碩士
校院名稱:逢甲大學
系所名稱:土木及水利工程研究所
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:2001
畢業學年度:89
語文別:中文
中文關鍵詞:排水帶土壤改良
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本研究利用垂直排水帶縮短排水路徑,可加速超額孔隙水壓消散之特性,嘗試以此原理作為防止液化發生之可能性評估。並在考慮因施打垂直排水帶,造成塗敷區應變量可能不等於未擾動區應變量之假設下,延伸輻射壓密理論。以此理論公式,作為防止液化發生之可能性評估的工具。本論文所得結論如下:
(一)考慮塗敷區應變量不等於未擾動區應變量,對於可壓縮土層之壓密時間影響甚小;其影響皆較考慮塗敷作用或考慮有限應變為小。
(二)在相同超額孔隙水壓消散百分比下,輻射壓密係數Ch值愈大,則超額孔隙水壓時間消散比t/td 值愈小,即愈能降低液化發生的可能性。
(三)於輻射壓密係數Ch值介於10-3 m2/sec至10-2 m2/sec,較能將t/td 值控制於小於1;而排水帶間隔因數n值大約介於2至12之間。
(四)在相同超額孔隙水壓消散百分比及輻射壓密係數下,排水帶間隔因數n愈小,t/td 值愈小;即緊密的排水帶間距,較能達到降低液化發生之目的。

第一章 緒論---------------------------------------------------1
1-1研究動機與目的---------------------------------------------1
1-2研究方法---------------------------------------------------1
1-3論文內容---------------------------------------------------2
第二章 相關文獻回顧-------------------------------------------3
2-1前言-------------------------------------------------------3
2-2液化相關研究-----------------------------------------------3
2-2-1液化機制-------------------------------------------------3
2-2-2液化破壞型式---------------------------------------------4
2-2-3能量法液化潛能評估公式-----------------------------------5
2-2-4防止液化之對策-------------------------------------------6
2-3垂直排水法理論公式演進-------------------------------------7
2-3-1垂直排水法概述-------------------------------------------7
2-3-2Barron理論-----------------------------------------------7
2-3-3Hansbo理論-----------------------------------------------9
2-3-4Goughnour理論-------------------------------------------11
2-3-5修正有限應變理論----------------------------------------12
第三章 原理與內容--------------------------------------------24
3-1前言------------------------------------------------------24
3-2公式推導--------------------------------------------------25
3-3評估控制液化發生可能性探討--------------------------------32
第四章 結果與討論--------------------------------------------37
4-1式(3-19)之參數探討----------------------------------------38
4-1-1Hansbo、Goughnour、修正有限應變理論及本研究式(3-19)之比
較------------------------------------------------------38
4-1-2Ω值之探討----------------------------------------------40
4-1-3s值之探討-----------------------------------------------41
4-1-4kh/ks值之探討-------------------------------------------43
4-2評估防止液化發生之可行性探討------------------------------44
第五章 結論--------------------------------------------------93
參考文獻-----------------------------------------------------95

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