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姓名 王乙翕(I-Shi Wang)  查詢紙本館藏   畢業系所 土木工程學系
論文名稱 層狀岩盤之承載力
(Bearing Capacity of Layered Rock Mass)
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摘要(中) 製備基礎承載試驗所需之層狀試體。藉由改變岩體不同地層狀況及層厚
比(H/B) 來探討淺長條基礎之極限承載力及其破壞模態。並透過數值分
析模擬與試驗對照以了解淺長條基礎在不同地層狀況下之承載行為。
經由研究結果顯示,由Hill (1950)、Chen (1975) 及Chen & Drucker
(1969)等學者理論預測之岩石承載力,預測值與試驗值皆有所偏差。Bell
(1915)、Sower (1979)、Wyllie (1992) 等學者之承載理論之預測值較接近
本文試驗值。層狀地層之承載理論中,砂岩在頁岩之上承載力預測方面
以Meyerhof & Hanna (1980) 承載理論最為準確,頁岩在砂岩之上承載力
之預測則以Myslivec & Kysela (1978) 經驗式較接近試驗值。最後本文以
加權平均之概念提出層狀地層承載力模式,經由求出上下岩層承載力、m、
Zmax等四個參數,本模式能預測層狀岩盤的承載力。
摘要(英) In this thesis, foundation tests carried out through reduced scale models,
the layered samples used of bearing capacity tests are prepared in methods and
techniques used by predecessors. This thesis investigates the bearing capacity
of shallow strip footing and failure models of layered stratum by changing
different geological condition. It could be comprehended that the behaviors of
shallow strip footing overlying stratum in different geological conditions
through numerical analysis and model tests.
According to the results of the sandstone and shale bearing capacity tests,
it could be observed that test results were different from the result of methods
proposed by Hill (1950), Chen (1975) and Chen & Drucker (1969), and results
of theoretical methods proposed by Bell (1915), Sower (1979), Wyllie (1992)
were closed to test results. The limit equilibrium method of Meyerhof & Hanna
(1980) had more accurate prediction of the result of sandstone overlying shale.
As to geological condition of shale overlaying sandstone, the empirical method
proposed by Myslivec & Kysela (1978) was more accurate at capacity forecast.
In this paper, an alternative method was proposed and verified the validity by
former solutions.
關鍵字(中) ★ 承載
★ 岩石承載力
★ 淺基礎
★ 層狀地層
★ 砂岩在頁岩之上
★ 頁岩在砂岩之上
關鍵字(英) ★ shale overlying sandstone
★ bearing capacity
★ shallow foundation
★ layered stratum
★ sandstoneoverlying shale
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
照片目錄.................................................................................................. XII
第一章緒論.............................................................................................1
1.1 研究動機...............................................................................................1
1.2 研究架構...............................................................................................3
1.3 本文內容...............................................................................................4
第二章文獻回顧.....................................................................................6
2.1 岩石承載行為......................................................................................7
2.1.1 岩盤強度評估..................................................................................8
2.1.2 岩石基礎破壞模式........................................................................ 18
2.2 完整岩石基礎承載力........................................................................... 22
2.2.1 建築規範............................................................................................................22
2.2.2 Bell (1915) 塑性平衡法...................................................................................23
2.2.3 Hill (1950) 極限分析法....................................................................................24
2.2.4 Ladanyi (1968) 塑性平衡法.............................................................................25
2.2.5 Chen & Drucker (1969) 極限分析...................................................................25
2.2.6 Chen (1975) 極限分析法.................................................................................28
2.2.7 Sower (1979) 塑性平衡法................................................................................28
2.2.8 Pell & Turner (1980) 塑性平衡法....................................................................29
2.3 非完整岩石之基礎承載力....................................................................30
2.3.1 RQD 折減法(Peck,1974) ..............................................................30
2.3.2 Wyllie (1992) 塑性平衡法..............................................................30
2.3.3 Ladanyi – Roy (1971) 承載理論......................................................31
2.3.4 Davis (1980) 塑性平衡法...............................................................32
2.3.5 Bishnoi & Sower (1979) 節理岩盤之承載力....................................33
2.4 層狀地層承載理論...............................................................................35
2.4.1 基礎荷載傳遞法.............................................................................35
2.4.2 Siva Reddy & Srinivasan (1967) 雙層黏性土壤承載力.....................36
2.4.3 Meyerhof (1974) 極限平衡法.........................................................39
2.4.4 Satyanarayana & Garg ( 1980 ) 經驗式............................................44
2.4.5 Bowels ( 1988 ) 基礎分析與設計....................................................46
2.4.6 Myslivec & Kysela ( 1978 ) 經驗式.................................................46
第三章實驗規劃...................................................................................49
3.1 人造層狀岩體製作材料.....................................................................49
3.1.1 岩體模擬材料之選擇......................................................................49
3.1.2 試驗材料........................................................................................51
3.1.3 決定配比........................................................................................53
3.2 試驗儀器及相關設備.........................................................................55
3.2.1 100 噸岩石壓力機..........................................................................55
3.2.2 材料試驗機....................................................................................56
3.2.3 基礎承載試驗箱.............................................................................57
3.2.4 三軸圍壓系統................................................................................58
3.2.5 岩石直剪試驗機.............................................................................59
3.2.6 量測系統.......................................................................................59
3.2.7 岩石鑽修設備................................................................................60
3.3 基礎承載模型製作.............................................................................60
3.3.1 材料準備.......................................................................................60
3.3.2 岩體壓製.......................................................................................61
3.3.2.1 均質人造砂岩試體之製作........................................................................61
3.3.2.2 均質人造頁岩試體之製作........................................................................62
3.3.2.3 人造砂岩在人造頁岩之上試體之製作....................................................62
3.3.2.4 人造頁岩在人造砂岩之上試體之製作....................................................62
3.3.3 模擬材料之養治與鑽修.................................................................63
3.4 基本力學性質試驗.............................................................................63
3.4.1 單壓強度試驗...............................................................................63
3.4.2 巴西人抗張試驗...........................................................................64
3.4.3 直接剪力試驗...............................................................................64
3.4.4 三軸壓縮試驗及應變量測.............................................................64
3.5 基礎承載試驗方法.............................................................................65
第四章試驗結果與討論....................................................................67
4.1 人造岩體之基本性質.........................................................................67
4.1.1 人造岩體之基本物理性質.............................................................67
4.1.2 人造岩體之力學性質....................................................................69
4.2 基礎模型承載試驗研究.....................................................................80
4.2.1 人造砂岩之承載力........................................................................80
4.2.2 人造頁岩之承載力........................................................................88
4.2.3 人造砂岩在人造頁岩之上承載力..................................................94
4.2.4 人造頁岩在人造砂岩之上承載力................................................ 112
4.2.5 綜合討論.................................................................................... 127
4.3 數值分析......................................................................................... 128
4.4 層狀地層承載力模式....................................................................... 138
第五章結論與建議..........................................................................149
5.1 結論................................................................................................ 149
5.2 建議................................................................................................ 151
參考文獻.................................................................................................152
附錄A 層狀地層承載力設計表....................................................... 156
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指導教授 田永銘(Yong-Ming Tien) 審核日期 2000-7-20
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