Soil-Water Characteristics of Unsaturated Residual Soil and Estimation of Matric Suction

DING Shao-lin; ZUO Chang-qun; LIU Dai-guo; LI Lin-sen; CHEN Jian-ping

doi:10.11988/ckyyb.20140932

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Journal of Changjiang River Scientific Research Institute ›› 2016, Vol. 33 ›› Issue (3) : 98-103. DOI: 10.11988/ckyyb.20140932

ROCK-SOIL ENGINEERING

Soil-Water Characteristics of Unsaturated Residual Soil and Estimation of Matric Suction

DING Shao-lin, ZUO Chang-qun, LIU Dai-guo, LI Lin-sen, CHEN Jian-ping

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Abstract

Residual soil which widely distributes in south China is one of the major soils encountered in engineering construction and geological disasters evaluation. The engineering properties of residual soil are dependent on the composition, structure, and stress of soil, and also on the matric suction. Soil-water characteristic curve expressing the relationship between soil water content and matric suction is an important part of research on non-saturated soil. In this research we select granite porphyry residual soil, tuff residual soil and conglomerate residual soil, which are typically representative in Fujian province, as test sample soils to determine the soil-water characteristic curve in the process of Dehumidification and moisture absorption. Then we explain lag effects of soil water characteristic curve from the microscopic point of view. Based on Barden’s unsaturated soil classification, we put forward a simple method to predict the matric suction with saturation by analyzing the practical engineering significant moisture (saturation between 50%-90%) in view of the difficulties in measuring matric suction.

Key words

residual soil / soil-water characteristic curve / Barden’s unsaturated soil classification / matric suction / saturation

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DING Shao-lin, ZUO Chang-qun, LIU Dai-guo, LI Lin-sen, CHEN Jian-ping. Soil-Water Characteristics of Unsaturated Residual Soil and Estimation of Matric Suction[J]. Journal of Changjiang River Scientific Research Institute. 2016, 33(3): 98-103 https://doi.org/10.11988/ckyyb.20140932

References

[1] FREDLUND D G, XING A. Equations for the Soil Water Characteristic Curve[J]. Canadian Geotechnical Journal, 1994, 31(4): 521-532.
[2] FREDLUND D G, VANAPALLI S K, XING A, et al. Prediction of the Shear Strength for Unsaturated Soils Using the Soil Water Characteristic Curve[C]∥Proceedings of the1995 International Conference on Unsaturated Soils. Paris, 1995: 63-691.
[3] VAN GENUCHTEN. Predicting the Hydraulic Conductivity of Unsaturated Soils[J]. Proceedings of Soil Science Society of America,1980,44(5):892-898.
[4] 吴宏伟,陈守义,庞宇威.雨水入渗对非饱和土坡稳定性影响的参数研究[J].岩土力学,1999,(1):2-15.
[5] 龚壁卫,吴宏伟,王斌.应力状态对膨胀土SWCC的影响研究[J].岩土力学,2004,(12):1915-1918.
[6] 蒋刚,林鲁生,刘祖德.降雨渗流作用下残积土边坡的数值分析[J].南京工业大学学报,2005,(5):27-31.
[7] 汤连生,颜波,李振嵩,等.花岗岩残积土水土特征曲线的试验研究[J].水文地质工程地质,2008,(4):62-65,79.
[8] 陈东霞,龚晓南.非饱和残积土的土-水特征曲线试验及模拟[J].岩土力学,2014,(7):1885-1891.
[9] 常波,吴益平,何高峰,等.临江Ⅱ号崩滑体土水特征曲线试验研究[J].长江科学院院报,2012,(9):53-58.
[10]唐延贵,吴礼舟.粉质砂土的土-水特征及一维应力变形试验研究[J].长江科学院院报,2013,(10):62-65.
[11]RIDLEY A M, BURLAND J B. A New Instrument for the Measurement of Soil Moisture Suction[J]. Geotechnique,1993, 43(2): 321-324.
[12]SHUAI F, FREDLUND D G. Use of New Thermal Conductivity Sensor to Measure Soil Suction[C]∥Advances in Unsaturated Geotechnics: Proceedings of Sessions of Geo-Denver. Denver Colorado,August 5-8, 2000: 1-12.
[13]陈仁朋,DAITA R K,DRNEVICH V P,等. 室内TDR试验监测石灰矿渣加固粘性土的物理化学反应过程(英文)[J]. 岩土工程学报,2006,(2):249-255.
[14]王钊,杨金鑫,况娟娟,等.滤纸法在现场基质吸力量测中的应用[J]. 岩土工程学报, 2003, 25(4):405－408.
[15]FREDLUND D G, XING A. Equations for the Soil-Water Characteristic Curve[J]. Canadian Geotechnical Journal, 1994, 31: 521-532.
[16]侯龙.非饱和土孔隙水作用机理及其在边坡稳定分析中的应用研究[D].重庆:重庆大学,2012.
[17]BARDEN L. Consolidation of Compacted and Unsaturated Clays[J]. Geotechnique,1965,15(3):267-286.