臺灣博碩士論文加值系統

本論文中作者利用雙軸向真K0壓密儀來探討紅棕土礫石層在有效垂直壓力作用下，相互在垂直的兩個側向有效土壓力(或相互垂直的兩個K0值)隨著礫石含量及排列型式變化關係。
研究結果顯示以下三項主要結論：(1)紅棕土礫石之整體行為與礫石含量有關，礫石含量小於或等於30%時，其整體行為乃為紅棕土粉粒控制；而礫石含量高於30%以上時，整體行為乃為礫石所控制。(2)非均向的靜止有效側向土壓隨著礫石含量的不同而變化，當礫石含量為40%時，非均向的靜止有效側向土壓最為顯著。(3)非均向的靜止有效側向土壓亦隨礫石長軸排列方向不同而變化，當礫石長軸與第一主軸交角45度時，非均向的靜止有效側向土壓有極小化的傾向。

In this research, a biaxial true K0 consolidumeter is presented and used to measure the two mutual orthogonal effective lateral earth pressures under the action of the effective vertical pressure for samples of lateritic gravel. Therefore, the characteristic of anisotropy for the effective lateral earth pressure at rest conductions can be studied.
Three conclusions are obtained from the results of this research. There are: (1) Behavior of lateritic gravel is related to the gravel content. When the gravel content is less then or equal to 30%, behavior of lateritic gravel is governed by laterite. However, when the gravel content is higher than 30%, behavior of lateritic gravel is controlled by gravel. (2) Anisotropy of the effective lateral earth pressure at rest conditions is varying with the content of gravel. The most favorable condition for anisotropy to happen is when gravel content is equal to 40%. (3) Anisotropy of lateritic gravel is also influenced by the orientation of gravel. When the angle between the long axis of the gravel and the first principle direction (defined as the one which is parallel to the lever of the loading) is equal to 45 degrees, the anisotropy for the effective lateral earth pressure at rest conditions is almost negligible.

目 錄
第一章 緒論 1
1-1 前言 1
1-2 研究主旨 1
1-3 研究步驟 1
第二章 文獻回顧 3
2-1 前言 3
2-2 Jaky之研究結果 3
2-3 Schmidt 和Alpan之研究結果 3
2-4 Brooker 和Ireland之研究結果
3
2-5 Mayne 和Kulhawy 之研究結果 5
2-6 Hendron 之研究結果 5
2-7 許澤善和陳君源之研究 10
2-8 洪如江之研究 10
2-9 Holtz 與 Eills 的研究成果 10
2-10 Rollins 等人之研究成果 13
第三章 本文 14
3-1 雙軸向真K0壓密儀 14
3-2 試驗土樣性質與準備過程 19
3-3 試驗步驟 19
3-4 試驗類型 22
3-4-1 礫石長軸與加壓槓桿之桿軸平行排列
22
3-4-2 礫石長軸與加壓槓桿之桿軸交角45度排列
22
第四章 試驗與分析結果 27
4-1 前言 27
4-2 礫石長軸與第一主軸平行排列之試驗結果 27
4-2-1加壓階段下之試驗結果
27
4-2-2解壓階段下之試驗結果 36
4-3 礫石長軸與第一主軸交角45度排列之試驗結果 41
4-3-1加壓階段下之試驗結果
41
4-3-2解壓階段下之試驗結果 50
4-4 K0值之比較與討論 62
4-4-1 本研究結果與陳君源[1996]所得結果之比
較
較 62
4-3-2 本研究結果與Schmidt和Alpan[1966]研究
結果比較 62
第五章 結論 69
文獻參考 71

參 考 文 獻
【1】Booker, Elmer W. , and H.O. Ireland. "Earth Pressure at Rest Related to Stress History," Canadian Geotchnical Journal, Vol. 11, No. 1 (Fed), 1965.
【2】Holtz, W. G. and Ellis, W. "Triaxial Shear Characteristics of Clayey Gravel Soils"，Proc .th. Inter. Confer.Soil Mech. Found. Eng., Vol. I, pp. 143-149. 1961.
【3】Hendron, A. J., Jr. "The Behavior of Sand in One-Dimensional Compression," Ph. D. thesis, Department of Civil Engineering, University of Illinois(Urbana), 1963.
【4】Jaky, J. "The Coefficient of Earth Pressure at Rest," Journal for Society of Hungarian Architects and Engineers, Budapest, Hungary, Oct., pp. 335-358, 1944.
【5】Mayne, P. W., and Kulhawy, F.H. "K0-OCR Relationship in soil," Journal of the Geotechnical Engineering Division, ASCE, Vol. 108, GT6, pp. 851-872, June, 1982.
【6】Rollins, K. M., Rollins, R. L., Smith, T. D. AND Beckwith, G. H. " Identification and Characterization and Charaterization of Collapsible Gravels", Journal Geotechnical Engineering, Vol. 120, No. 3, pp. 528-542. 1994.
【7】Schmidt, B., and Alpan, I. "Earth pressure at Rest Related to Stress History," Discussion, Canadian Geotchnical Journal, National Research Council, ottawa, onfario, canada, Vol.3 ,No.4 ,pp. 239-242,1966.
【8】許澤善，"uK0壓密儀之改良與使用推廣"，行政院國家科學委員會專題研究計畫成果報告，1995.
【9】陳君源，"砂質土直接剪力行為與靜止土壓力係數之研究"，逢甲大學土木即水利工程研究所碩士論文，1996.
【10】洪如江，"x灣紅土礫石台地之風化與侵蝕"，國際卵礫石層地下工程研討會，1995.
【11】褚炳麟、潘進明、張國雄，"x灣西部卵礫石層現地之大地工程性質"，地工技術，第55期，第47-58頁，1996.