[1] Zhang Dingwen, Liu Songyu, Zhang Tao,. Water content and modulus relationshipof a compacted unsaturated soil [J]. Journal of Southeast University (English Edition), 2012, 28 (2): 209-214. [doi:10.3969/j.issn.1003-7985.2012.02.014]

Copy

Water content and modulus relationshipof a compacted unsaturated soil()

Share：

Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

28

Issue:

2012 2

Page:

209-214

Research Field:

Traffic and Transportation Engineering

Publishing date:

2012-06-30

Info

Title:

Water content and modulus relationshipof a compacted unsaturated soil

Author(s):

Zhang Dingwen;  Liu Songyu;  Zhang Tao

School of Transportation, Southeast University, Nanjing 210096, China

Keywords:

modulus;  water content;  unsaturated compacted soil

PACS:

U416.1

DOI:

10.3969/j.issn.1003-7985.2012.02.014

Abstract:

In order to assess the performance of the embankment soil under various climate conditions during the period of service, the modulus behaviour of an unsaturated compacted soil is evaluated using the constant water content triaxial test. Since the water content measurement method is simple and economical and it is used widely in engineering, the soil suction is replaced by the water content and the relationship between the water content and the modulus is developed. The compacted samples are prepared with different compacted water contents, and samples with a similar water content subjected to drying or wetting procedures prior to the triaxial test are also investigated. The effect of the water content and the confining pressure on the modulus is analyzed. The results show that the modulus decreases with the increase in the water content and a power function can be proposed to quantitatively describe the relationship between the modulus and the water content in the range of the measured water content. The modulus increases with the increase in the confining pressure of the compacted soil. However, the effect of the water content on the modulus is more pronounced than that of the confining pressure. This research can be referenced for the compacted embankment soil assessment in-service period.

References:

[1] Ling Jianming, Xie Jingbao, Zheng Yuefeng, et al. Prediction method of equivalent resilient modulus on top of pavement subgrade with underground water table[J]. Journal of Tongji University: Natural Science, 2005, 33(2): 162-165.(in Chinese)
[2] Zhao Minghua, Liu Xiaoping, Chen An. Analysis of capillary effect in unsaturated roadbed[J]. Journal of Highway and Transportation Research and Development, 2008, 25(8): 26-30.(in Chinese)
[3] Song Xiuguang, Zhang Hongbo, Wang Songgen, et al. Hydrophilic characteristics and strength decay of silt roadbed in Yellow River alluvial plain[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(10): 1594-1602.(in Chinese)
[4] Sawangsuriya A, Edil T B, Bosscher P J. Modulus-suction-moisture relationship for compacted soils in postcompaction state[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2009, 135(10): 1390-1403.
[5] Thadkamalla G B, George K P. Characterization of subgrade soils at simulated field moisture[J]. Journal of Transportation Research Record, 1995, 1481: 21-27.
[6] Uzan J. Characterization of clayey subgrade materials for mechanistic design of flexible pavements[J]. Journal of Transportation Research Record, 1998, 1629: 189-196.
[7] Yang S R, Huang W H, Tai Y T. Variation of resilient modulus with soil suction for compacted subgrade soils[J]. Journal of Transportation Research Record, 2005, 1913: 99-106.
[8] Fredlund D G, Rahardjo H. Soil mechanics for unsaturated soils[M]. New York: Wiley, 1993.
[9] Perera Y Y, Zapata C E, Houston W N, et al. Moisture equilibria beneath highway pavements[C/D]//The 83th Transportation Research Board Annual Meeting. Washington DC, USA, 2004.
[10] Costa Y D, Cintra J C, Zornberg J G. Influence of matric suction on the results of plate load tests performed on a lateritic soil deposit[J]. Geotechnical Test Journal, 2003, 26(2): 1-9.
[11] Inci G, Yesiller N, Kagawa T. Experimental investigation of dynamic response of compacted clayey soils[J]. Geotechnical Test Journal, 2003, 26(2): 125-141.
[12] Yang S R, Lin H D, Kung J H S, et al. Suction-controlled laboratory test on resilient modulus of unsaturated compacted subgrade soils[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2008, 134(9):1375-1384.
[13] Mancuso C, Vassallo R, D’onofrio A. Small strain behavior of a silty sand in controlled-suction resonant column-torsional shear tests[J]. Canadian Geotechnical Journal, 2002, 39(1): 22-31.
[14] Ling Hua, Yin Zongze. Variation of unsaturated soil strength with water contents[J]. Chinese Journal of Rock Mechanics and Engineering, 2007, 26(7): 1499-1503.(in Chinese)
[15] Ling Hua, Yin Zongze, Cai Zhengyin. Experimental study on stress-water content-strain relationship of unsaturated soil[J]. Rock and Soil Mechanics, 2008, 29(3): 651-655.(in Chinese)
[16] British Standard Institute. BS 1377-4 Methods of test for soils of civil engineering purposes: compaction-related tests[S]. Milton Keynes, UK: BSI, 1990.
[17] Mendes J. Assessment of the impact of climate change on an instrumented embankment: an unsaturated soil mechanics approach[D]. School of Engineering of Durham University, 2011.
[18] Yin Zongze. Principles on soil mechanics and engineering[M]. Beijing: China Water Power Press, 2007.(in Chinese)
[19] Kodikara J K, Choi X. A simplified analytical model for desiccation cracking of clay layers in laboratory tests[C]//Proceedings of the 4th International Conference on Unsaturated Soils. Carefree, Arizona, USA, 2006:2558-2569.
[20] Zhang Fangzhi, Chen Xiaoping. Influence of repeated drying and wetting cycles on mechanical behaviors of unsaturated soil[J]. Chinese Journal of Geotechnical Engineering, 2010, 32(1):41-46.(in Chinese)

Memo

Memo:

Biography: Zhang Dingwen(1978—), male, doctor, associate professor, zhangdw@seu.edu.cn.
Foundation item: The Natural Science Foundation of Jiangsu Province(No.BK2011618).
Citation: Zhang Dingwen, Liu Songyu, Zhang Tao. Water content and modulus relationship of a compacted unsaturated soil[J].Journal of Southeast University(English Edition), 2012, 28(2):209-214.[doi:10.3969/j.issn.1003-7985.2012.02.014]

Common functions