建議

1. 目前光纖光柵位移計之設計為利用安裝於三軸試體頂蓋之鋼片推動位移計 上端設計之斜面，使位移計在土壤試體產生垂直位移時推動位移計造成光纖 光柵波長改變。但目前之設計在光纖光柵位移計裝設上，不易使鋼片與位移 計之斜面恰好接觸，且為使小應變之量測更為準確，於摩擦力之影響也應盡 量降低，因此在接觸面之位置調整與接觸型式其設計機制可進一步改良。

2. 光纖光柵感測器初步結果已證實可應用於非飽和三軸試驗上，但目前設計之 量測精度還未達需求，因此建議後續可以提高光纖光柵感測器之精度。

3. 目前光纖光柵感測器量測所擷取之訊號為光纖光柵波長變化，於試驗過程中 所受之應力、位移以及孔隙水壓皆無法直接顯示其物理量，建議後續可寫一 程式立即將所擷取之光纖光柵讀數計算後直接顯示成所量測之物理量。

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4. 目前土壤水份特性曲線是由壓力板試驗所得，壓力板試驗之試體未經等向壓 密與三軸試體需經過壓密不同，且自製之壓力板儀無法做出土壤水份特性曲 線之吸水段，建議未來改由非飽和三軸試驗儀進行土壤水份特性曲線之研 究。且本研究之土壤水分特性曲線屬於低吸力範圍，若能增加高吸力範圍之 研究，將有助於完整了解土壤水分變化之情形。

5. 本研究之非飽和三軸試驗，目前僅控制有效圍壓為 100kPa，即只模擬一種 深度下土層之基值吸力對剪力強度之影響，若能控制不同有效圍壓下之狀 況，將可以了解不同深度下土層之基值吸力對剪力強度之影響。

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6. Bishop, A W., and Blight, G. E., 1963, “Some Aspects of Effective Stress in Saturated and Unsaturated Soils,” Geotechnique, Vol. 13, No. 3, pp. 177-197.

7. Bolt, G. H. and Miller, R. D., 1958, “Calculation of Total and Component Potentials of Water in soil,” Amer. Geophys. Union Transportation, Vol. 39, pp.

917-928.

8. Buckingham, 1907, “Studies of The Movement of Soil Moisture,” U.S.D.A. Bur.

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11. Corey, A. T., Slayter, R. O., and Kemper, W. D., 1967, “Comparative Terminologies for Water in the Soil-Plant-Atmosphere System,” Irrigation in Agricultural Soils, R. M. Hagan et al., Eds., Amer. Soc. Agron., Mono. No. 11, Ch. 22.

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John Wiley and Sons, New York.

14. Fredlund, D. G. and Xing, A., 1994, “Equations for the soil-water character curve,” Canadian Geotechnical Journal, Vol. 31, pp. 521-532.

15. Fredlund, D. G. and Morgenstern, N. R., 1978, “Stress State Variable for UnsaturatedSoils,” ASCE J. of Geotechnical Engineering, Geotechnical Division, GT11, pp. 1415-1416.

16. Fredlund, D. G., Morgenstern, N. R., and Widger, R. A., 1978, “The Shear Strength of Unsaturated Soil,” Canadian Geotechnical Journal, Vol. 15, No. 3, pp.

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17. Fredlund, D. G., Rahardjo, H. and Gan, J. K. M., 1987, “Nonlinearity of Strength Envelope for Unsaturated Soils,” Proceedings of the 6th International Conference on Expansive Soils, New Delhi, India, pp. 49-54.

18. Ho, D. Y. F. and Fredlund, D. G., 1982, “Increase in Strength due to Suction for Two Hong Kong Soils,” Proc. of ASCE Speciality Conference on Engineering and Construction in Tropical and Residual Soils, Hawaii, pp. 263-296.

19. Schofield, R., 1935, “The PF of the Water in Soil,” Trans. 3rd Int. Congress Soil Sci., Vol. 2, pp. 37-48.

20. S. S. Agus, E. C. Leong., and H. Rahardjo (2001). “Soil-water characteristic curve of Singapore residual soils,” Geotechnical and Geological Engineering, Vol. 19, pp.285-309.

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