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标题：Performance of high-capacity tensiometer in constant water content oedometer test
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作者：M. Wijaya ; M. Wijaya ; E. C. Leong 等
期刊名称：International Journal of Geo-Engineering
印刷版ISSN：2092-9196
电子版ISSN：2198-2783
出版年度：2016
卷号：7
期号：1
页码：1-15
DOI：10.1186/s40703-016-0027-6
语种：English
出版社：Springer
摘要：Abstract Background Matric suction is one of the stress-state variables which governs the behaviour of unsaturated soils. In order to evaluate the effect of matric suction on the behaviour of unsaturated soil under constant water content condition, rapid measurement of change in matric suction during the test is required. High-capacity tensiometer can be used to rapidly measure the change in matric suction of unsaturated soil. Methods In this paper, an oedometer apparatus was modified to incorporate a high-capacity tensiometer to investigate the compression behaviour of unsaturated soil under constant water content condition. The design of the oedometer apparatus was described. Two soils which are kaolin FP grade (commercial kaolin which has a fine grain size) and residual soil from Bukit Timah Granite were used to evaluate the performance of the high-capacity tensiometer. Results The results showed that kaolin paste is helpful in improving the contact condition between the soil specimen and high-capacity tensiometer. The equilibrium time of the high-capacity tensiometer was about 10 min. Evaporation effect reported by other researchers was not observed with the high-capacity tensiometer. Conclusion The change in matric suction due to loading and unloading was accurately captured by the high-capacity tensiometer.
关键词：KeywordsEnUnsaturated soilHigh-capacity tensiometerPore-water pressure measurementConstant water contentOedometer test