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姓名 游明縑(Ming-Qian You) 查詢紙本館藏 畢業系所 土木工程學系 論文名稱 不同試驗方法對黏土壓縮與壓密性質之影響 相關論文 檔案 [Endnote RIS 格式]
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摘要(中) 本研究針對各種黏性土壤進行一系列室內壓密試驗，探討不同應
力延時、不同擾動程度，以及不同應力增量比下，土壤壓縮與壓密行
為與標準單向度壓密試驗結果之差異。由實驗結果可知，短應力延時
試驗所得之壓縮與壓密參數值，皆與標準單向度試驗相差甚小，唯一
較為離散之參數為二次壓縮指數，此乃短應力延時試驗之二次壓縮行
為發展尚未穩定所致，但若利用Mesri 之c C Ca 為常數之觀念，則可
避免此一問題。因此短應力延時壓密試驗實值得吾人進一步運用，並
能有效地改善標準壓密試驗耗時過長之缺點。
根據不同性質黏土之壓密試驗結果及相關文獻資料進行整理分
析，提出適用範圍極廣之黏土壓縮及壓密參數迴歸方程式，並將這些
迴歸式與其他學者提出之統計結果進行比較。統計結果顯示壓縮指數
及再壓指數與土樣之初始孔隙比、自然含水量及液性限度具有良好之
線性關係，而c C Ca 及壓密係數則隨塑性指數變化， k C 與初始孔隙比
亦呈正相關。另一方面，本研究亦比較各種參數取決法於求取結果之
差異，並探討其對沉陷分析之影響。上述研究成果可供爾後進行黏土
壓密及沉陷分析選擇試驗與壓縮及壓密參數之參考。摘要(英) This research conducted a series of consolidation tests on clays with
different plasticity index. Its purpose is to investigate the compression
and consolidation behavior under different loading duration, loading
increment and sample disturbance and the differences with that from
standard consolidation test. Test results show that the compression and
consolidation parameters of short loading duration test are close to those
from standard test except for the secondary consolidation coefficient. It
was found that short loading duration test can replace the standard test in
reducing long testing time for low plasticity clay.
Statistical correlations of the compression and consolidation
parameters with physical index of clay are established for alluvial clays
based on the test results and data from paper reviews. The compression
and consolidation parameters have good linear correlation with initial
void ratio, natural water content, and liquid limit of clay. Furthermore,
variations of Cá/Cc and cv with plasticity, and Ck with initial void ratio are
presented. The differences of the methods in determining parameters are
also compared and discussed. The research results provide a helpful guide
to select test procedure and parameters for consolidation and settlementanalysis of clay.關鍵字(中) ★ 單向度壓密試驗
★ 壓縮指數
★ 二次壓縮指數
★ 壓密係數關鍵字(英) ★ Oedometer Test
★ Compression Index
★ Secondary Compression論文目次 中文摘要.........................................................................................Ⅰ
英文摘要.........................................................................................Ⅱ
目錄..................................................................................................Ⅲ
圖目錄..............................................................................................Ⅵ
表目錄..............................................................................................Ⅹ
符號說明.....................................................................................ⅩⅠ
第一章緒論.....................................................................................1
1-1 研究動機及目的.......................................................................... 1
1-2 研究流程...................................................................................... 1
1-3 論文內容...................................................................................... 2
第二章文獻回顧............................................................................4
2-1 黏土壓縮與壓密性質................................................................... 4
2-2 預壓密應力.................................................................................. 5
2-2-1 預壓密應力之決定方法................................................... 6
(A)Casagrande 法......................................................................... 6
(B)Schmertmann 法...................................................................... 7
(C)Holtz & Kovacs 法.................................................................. 9
(D)單位體積應變能法(Onitsuka 法)..........................................10
2-2-2 影響決定預壓密應力之因素............................................13
(A)試體擾動之影響....................................................................14
(B)加載應力延時之影響............................................................14
(C)應力增量比之影響................................................................15
2-3 壓縮指數與再壓指數..................................................................16
2-4 壓縮係數.....................................................................................20
2-5 體積壓縮係數.............................................................................20
2-6 壓密係數.....................................................................................22
2-6-1 垂直向壓密係數.............................................................22
(A)Casagrande 對數時間調整法.................................................22
(B)Taylor 平方根時間調整法......................................................23
(C) Sridharan 法..........................................................................25
(D)Robinson 法...........................................................................27
2-6-2 各種壓密係數決定法之綜合評述.....................................28
2-6-3 影響垂直向壓密係數之因素............................................31
(A)應力狀態...............................................................................31
(B)應力增量比...........................................................................32
(C)不同壓密係數之決定方法.....................................................32
(D)應力延時...............................................................................33
2-6-4 水平向壓密係數...............................................................33
2-7 二次壓縮行為.............................................................................33
2-7-1 二次壓縮沉陷...................................................................33
2-7-2 二次壓縮指數...................................................................35
2-7-3 影響二次壓縮之因素.......................................................37
(A)應力延時...............................................................................37
(B)試體擾動...............................................................................38
(C)應力增量比...........................................................................38
(D)應力狀態...............................................................................39
(E)不同試體高度........................................................................40
第三章試驗方法、試驗儀器與試驗土樣................................41
3-1 不同試驗方法及程序..................................................................41
3-2 標準單向度壓密試驗..................................................................42
(A)試驗儀器與設備....................................................................42
(B)試驗土樣與試體準備............................................................43
(C)試驗內容與步驟....................................................................46
3-3 短應力延時壓密試驗..................................................................48
(A)試驗儀器與設備....................................................................49
(B)試驗土樣與試體準備............................................................49
(C)試驗內容與步驟....................................................................49
3-4 小應力增量比壓密試驗..............................................................49
(A)試驗儀器與設備....................................................................50
(B)試驗土樣與試體準備............................................................50
(C)試驗內容與步驟....................................................................50
3-5 嚴重擾動土樣壓密試驗..............................................................50
(A)試驗儀器與設備....................................................................51
(B)試驗土樣與試體準備............................................................51
(C)試驗內容與步驟....................................................................51
3-6 長應力延時壓密試驗..................................................................51
(A)試驗儀器與設備....................................................................52
(B)試驗土樣與試體準備............................................................52
(C)試驗內容與步驟....................................................................52
第四章室內試驗結果與整理.....................................................53
4-1 不同試驗方法與程序之參數整理...............................................53
4-1-1 壓縮參數..........................................................................53
(A)壓縮指數.............................................................................53
(B)再壓指數.............................................................................57
(C)二次壓縮指數......................................................................60
(D)體積壓縮係數......................................................................63
(E)預壓密應力............................................................................69
4-1-2 壓密參數..........................................................................74
(A)壓密係數.............................................................................74
(B)滲透係數.............................................................................85
4-2 不同種類土壤之參數整理..........................................................88
4-2-1 壓縮參數..........................................................................89
(A)壓縮指數.............................................................................89
(B)再壓指數.............................................................................98
(C)二次壓縮指數....................................................................102
4-2-2 壓密參數........................................................................108
(A)壓密係數...........................................................................108
(B)滲透係數............................................................................. 112
第五章結論與建議....................................................................114
5-1 結論........................................................................................... 114
5-1-1 不同試驗方法與標準單向度壓密試驗之比較................. 114
(A)短應力延時試驗.................................................................. 114
(B)嚴重擾動土樣試驗.............................................................. 115
(C)小應力增量比試驗.............................................................. 115
(D)長應力延時壓密試驗.......................................................... 116
5-1-2 不同性質土樣之試驗結論............................................... 117
(A)壓縮指數與再壓指數...................................................... 117
(B)二次壓縮指數.................................................................... 117
(C)壓密係數........................................................................... 118
(D)滲透係數............................................................................. 118
5-2 建議........................................................................................... 118
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pp. 421-427, Singapore (1993).指導教授 黃俊鴻(Jing-Hung Hwang) 審核日期 2000-7-7 推文 plurk
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