跳到主要內容

臺灣博碩士論文加值系統

(3.235.227.117) 您好!臺灣時間:2021/07/28 01:37
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果 :::

詳目顯示

我願授權國圖
: 
twitterline
研究生:沈欽裕
研究生(外文):Sheen, Chin-Yuh
論文名稱:地工合成物加勁砂樁載重-沈陷關係初探
論文名稱(外文):Load-Deformation Ralation of Geosynthetic-Reinforced Granular Column
指導教授:吳朝賢
指導教授(外文):Cho-Sen Wu
學位類別:碩士
校院名稱:淡江大學
系所名稱:土木工程學系
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:1996
畢業學年度:84
語文別:中文
論文頁數:162
中文關鍵詞:砂樁組成關係地工合成物孔穴加勁
外文關鍵詞:granular columnconstitutive relationgeosyntheticcavityreinforce
相關次數:
  • 被引用被引用:7
  • 點閱點閱:163
  • 評分評分:
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
在基礎工程設計中,如遇基地之土壤性質過於軟弱時,一般皆採用數
種方案,使基地土壤能夠增加承載力或減小沈陷量。在各種方案中,土壤
改良方法同時具有經濟、迅速及彈性大等優點,且逐漸被廣泛採用。尤其
腹地廣大之基地改良,常使用砂石樁配合預壓法改良基地土壤之工程性質
,所以砂石樁載重-沈陷關係遂為一重要研究課題。一般砂樁載重-沈陷關
係之研究,均藉由有限元素法解決。 本文利用材料應力-應變行為與
組成關係,配合力平衡與變形連續之條件方程式,建立砂石樁及地工合成
物加勁砂石樁之承載模式。承載模式配合疊加方法,可求得砂石樁軸向載
重與沈陷之關係。再由探討地工合成物強度參數對砂石樁承載力之影響,
建議加勁材料之選擇方法及其對砂石樁承載強度之加勁效果。 研究結
果顯示:(1)藉由承載模式分析,可得完整之載重-沈陷關係曲線,清楚的
了解沈陷隨載重之變化行為。(2)承載模式可預測地工合成物對砂樁加勁
效率及提供地工合成物之選材參考。(3)砂石樁無論加勁與否,皆於系統
破壞前達降伏態,故加勁材料之極限承載值應以砂土材料之壓縮強度為考
量。(4)本文之承載模式,可用以修正一般傳統三軸壓縮試驗所求得之強
度參數。
This paper presents theoretical analysis of the bearing
stress-deformation relationship of soft soil reinforcing with
geosynthetic-encapsulated granular column. Shear stress-strain
curve of granular materials are normalized to account for the
effect of volume change, while radial strain of soft soil are
modelled by expansion of cyclindrcal cavity. First phase of
the study predicts uniaxial compression-deformation relationship
of sand column encapsulated by geosynthetic. Encapsulation of
geosynthetic provides reinforcement function through development
of circumferential tensile stress. The magnitude of this stress
depends on the circumferential strain and modulus of the
encapsulating geosynthetic. The tensile stress in turn exerts a
radial confining stress on the encapsulated granular column
which mobilizes its compressive strength and resistance to
further deformation. Second phase of the study predicts
bearing stress-deformation behavior of soft soil reinforcing
with geosynthetic-encapsulated granular column. Lateral restrain
of granular column comes not only from the surrounding soil but
also from circumferential stress of encapsulating reinforcement.
Verification of this study is made by comparing predictions with
those obtrained from other existing methods. Reasonable
agreements have been reached for the cases of ultimate bearing
capacities of soft soil and granular column respectively.
Parametric studies reveal that improvements of load-settlement
behavior by the increases of granular column size and
reinforcement strength are more obvious with the occurance of
greath axial strain, while stiffness of reinforcement
contributes it''s function at the beginning stage of the loading
process. Analytical results show remarkable incrrease of
rigidity and bearing capacity of soft soil while reinforced with
geosynthetic-encapsulated granular column.
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top
無相關期刊