中文概要
目 的
综合使用 HYPROP 和 WP4C 两种仪器, 探索 采用蒸发法和冷镜露点法测量大吸力范围的水-土特征曲线, 并采用收缩曲线对土体变形进行修 正。
方 法
1. 方法, 在 0∼100 kPa 吸力范围内 测量土体的水-土特征曲线。 2. 当吸力大于 600 kPa 时, 采用WP4C 仪器, 测量土体的水-土 特征曲线。 3. 采用传统张力仪吸力板仪器, 在 0∼500 kPa 吸力范围内测量土体的水-土特征曲 线。 4. 采用 Satyanaga et al. (2017)公式, 对实验 数据进行拟合。 5. 采用 HYPROP 仪器直接测量土 体的非饱和渗透系数。 6. 采用蒸发法, 获取干缩 曲线。
结 论
1. 采用 Satyanaga et al. (2017)公式, 对实验数据进 行拟合, 拟合参数直接关联到进气值、拐点及方 差。拟合结果显示, 不同仪器所收集的水-土特征 曲线的数据相互吻合, 为水-土特征曲线的实验测 量提供了更大的吸力范围。 2. 采用 HYPROP 仪器 测量的非饱和渗透系数和采用传统改装的非饱 和三轴实验数据基本吻合, , 因此, HYPROP 可以 作为在低吸力范围内 (<100 kPa) 测量非饱和渗 透系数的有效仪器。 3. 当进气值小于 100 kPa 或 者大于 500 kPa 时, 综合采用 HYPROP 和 WP4C 可以有效缩短实验周期。
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References
ASTM (American Society for Testing and Materials), 2002. Standard Test Methods for Determination of the Soil Water Characteristic Curve for Desorption Using a Hanging Column, Pressure Extractor, Chilled Mirror Hygrometer, and/or Centrifuge. ASTM D6836-02, ASTM, West Conshohocken, PA, USA.
Cai GQ, Zhao CG, Li J, et al., 2014. A new triaxial apparatus for testing soil water retention curves of unsaturated soils under different temperatures. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 15(5):364–373. https://doi.org/10.1631/jzus.A1300358
Childs EC, Collis-George N, 1950. The permeability of porous materials. Proceedings of the Royal Society A, 201(1066): 392–405. https://doi.org/10.1098/rspa.1950.0068
Fredlund DG, 2007. Slope stability hazard management systems. Journal of Zhejiang University SCIENCE A, 8(11):1695–1711. https://doi.org/10.1631/jzus.2007.A1695
Fredlund DG, Rahardjo H, 1993. Soil Mechanics for Unsaturated Soils. Wiley, New York, USA.
Fredlund DG, Xing A, 1994. Equations for the soil-water characteristic curve. Canadian Geotechnical Journal, 31(3):521–532. https://doi.org/10.1139/t94-061
Fredlund DG, Rahardjo H, Fredlund MD, 2012. Unsaturated Soil Mechanics in Engineering Practice. John Wiley & Sons, Hoboken, USA.
Fredlund MD, Wilson GW, Fredlund DG, 2002. Representation and estimation of the shrinkage curve. Proceedings of the 3rd International Conference on Unsaturated Soils, p.145–149.
Gallage C, Kodikara J, Uchimura T, 2013. Laboratory measurement of hydraulic conductivity functions of two unsaturated sandy soils during drying and wetting processes. Soils and Foundations, 53(3):417–430. https://doi.org/10.1016/j.sandf.2013.04.004
Huang SY, Fredlund DG, Barbour SL, 1998. Measurement of the coefficient of permeability for a deformable unsaturated soil using a triaxial permeameter. Canadian Geotechnical Journal, 35(3):426–432. https://doi.org/10.1139/t98-011
Kassim A, Gofar N, Lee LM, et al., 2012. Modeling of suction distributions in an unsaturated heterogeneous residual soil slope. Engineering Geology, 131–132:70–82. https://doi.org/10.1016/j.enggeo.2012.02.005
Leong EC, Tripathy S, Rahardjo H, 2003. Total suction measurement of unsaturated soils with a device using the chilled-mirror dew-point technique. Géotechnique, 53(2): 173–182. https://doi.org/10.1680/geot.2003.53.2.173
Mantri S, Bulut R, 2014. Evaluating performance of a chilled mirror device for soil total suction measurements. Proceedings of Geo-Hubei 2014 International Conference on Sustainable Civil Infrastructure. https://doi.org/10.1061/9780784478509.008
Merayyan SM, Miller CJ, 2006. Determination of the soil-water characteristic curve using the evaporation technique. Proceedings of the 4th International Conference on Unsaturated Soils.
Peters A, Durner W, 2008. Simplified evaporation method for determining soil hydraulic properties. Journal of Hydrology, 356(1–2):147–162. https://doi.org/10.1016/jjhydrol.2008.04.016
Peters A, Iden SC, Durner W, 2015. Revisiting the simplified evaporation method: identification of hydraulic functions considering vapor, film and corner flow. Journal of Hydrology, 527:531–542. https://doi.org/10.1016/j.jhydrol.2015.05.020
Priono, Rahardjo H, Chatterjea K, et al., 2017. Laboratory investigation on hydraulic anisotropy behavior of unsaturated soil. Canadian Geotechnical Journal, 54(7): 1034–1046. https://doi.org/10.1139/cgj-2016-0023
Rahardjo H, Satyanaga A, D’Amore GAR, et al., 2012. Soil-water characteristic curves of gap-graded soils. Engineering Geology, 125:102–107. https://doi.org/10.1016/j.enggeo.2011.11.009
Rahardjo H, Satyanaga A, Mohamed H, et al., 2019. Comparison of soil-water characteristic curves from conventional testing and combination of small-scale centrifuge and dew point methods. Geotechnical and Geological Engineering, 37(2):659–672. https://doi.org/10.1007/s10706-018-0636-2
Samingan AS, Leong EC, Rahardjo H, 2003. A flexible wall permeameter for measurements of water and air coefficients of permeability of residual soils. Canadian Geotechnical Journal, 40(3):559–574. https://doi.org/10.1139/t03-015
Samingan AS, Leong EC, Rahardjo H, 2005. Estimating permeability functions of Singapore residual soils. Engineering Geology, 78(1–2):119–133. https://doi.org/10.1016/j.enggeo.2004.12.001
Satyanaga A, Rahardjo H, Zhai Q, 2017. Estimation of unimodal water characteristic curve for gap-graded soil. Soils and Foundations, 57:789–801. https://doi.org/10.1016/j.sandf.2017.08.009
Schindler U, 1980. Ein schnellverfahren zur messung der wasserleitfähigkeit im teilgesättigten boden an stechzylinderproben. Archiv für Acker-und Pflanzenbau und Bodenkunde, 24(1):1–7 (in German).
Schindler U, Durner W, von Unold G, et al., 2010a. The evaporation method: extending the measurement range of soil hydraulic properties using the air-entry pressure of the ceramic cup. Journal of Plant Nutrition and Soil Science, 173(4):563–572. https://doi.org/10.1002/jpln.200900201
Schindler U, Durner W, von Unold G, et al., 2010b. Evaporation method for measuring unsaturated hydraulic properties of soils: extending the measurement range. Soil Science Society of America Journal, 74(4):1071–1083. https://doi.org/10.2136/sssaj2008.0358
Schindler U, Doerner J, Mueller L, 2015. Simplified method for quantifying the hydraulic properties of shrinking soils. Journal of Plant Nutrition and Soil Science, 178(1): 136–145. https://doi.org/10.1002/jpln.201300556
Vanapalli SK, Garga VK, Brisson P, 2007. A modified permeameter for determination of unsaturated coefficient of permeability. Geotechnical and Geological Engineering, 25(2):191–202. https://doi.org/10.1007/s10706-006-9103-6
Wind GP, 1968. Capillary conductivity data estimated by a simple method. In Rijtema PE, Wassink H(Eds.), Water in the Unsaturated Zone. IASH, Gentbrugge, Belgium, p.19–23.
Zhai Q, Rahardjo H, Satyanaga A, et al., 2017. Effect of bimodal soil-water characteristic curve on the estimation of permeability function. Engineering Geology, 230:142–151. https://doi.org/10.1016/j.enggeo.2017.09.025
Zhan LT, Chen P, Ng CWW, 2007. Effect of suction change on water content and total volume of an expansive clay. Journal of Zhejiang University SCIENCE A, 8(5):699–706. https://doi.org/10.1631/jzus.2007.A0699
Acknowledgements
The authors would like to acknowledge the assistance from Prof. Qian ZHAI from Key Laboratory for RC and PRC Structures of the Ministry of Education, Southeast University, China in providing the Chinese translation of the summary of the paper. The authors also acknowledge the assistances from Mr. Jeremy TAN and Ms. Yu-ying WANG during the collection of the data in this study.
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Measurement of a soil-water characteristic curve and unsaturated permeability using the evaporation method and the chilled-mirror method
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Satyanaga, A., Rahardjo, H., Koh, Z.H. et al. Measurement of a soil-water characteristic curve and unsaturated permeability using the evaporation method and the chilled-mirror method. J. Zhejiang Univ. Sci. A 20, 368–374 (2019). https://doi.org/10.1631/jzus.A1800593
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DOI: https://doi.org/10.1631/jzus.A1800593