Analysis of the Calculation Method of Active Earth Pressure of Unsaturated Expansive Soil

Abstract:

The properties of unsaturated expansive soil were analyzed, and the shortcomings of present methods which are explored to calculate the active earth pressure of unsaturated expansive soil on the retaining structure were discussed. Based on Coulomb’s earth pressure theory, a calculation formula of active earth pressure of unsaturated expansive soil was proposed taking into account of the swelling pressure parameters according to the condition of static equilibrium of sliding soil. The formula has simple composition and derivation process, is convenient for application, and the example shows that this method is reasonable.

• Periodical: Advanced Materials Research (Volumes 594-597)
• Pages: 180-185
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.594-597.180
• Online since: November 2012
• Authors: Jia Shan Zhang
• Keywords: Active Earth Pressure, Coulomb’s Earth Pressure Theory, Expansive Soil, Swelling Pressure

References

[1] Minghua Zhao: Soil Mechanics and Foundation Engineering (Wuhan University of Technology Press, China 2000), pp.106-114. In Chinese

[2] Yingjun Zhang: Distribution of Lateral Swelling Pressure and the Method of Design and Computation of Retaining Wall in Expansive Soil Area. Railway Science, Vol. 1 (1995), pp.93-102. In Chinese

[3] Zhiduo Zhu, Songyu Liu: Analysis of Active Earth Pressure of Unsaturated Expansive Soil. Journal of Highway and Transportation Research and Development, Vol. 5(2001), pp.1-5. In Chinese

[4] Xiaojun Hu: Calculation about Active Earth Pressure of Unsaturated Expansive Soil based on Coulomb Theory. Subgrade Engineering, Vol. 4(2006), pp.73-76. In Chinese

[5] Zhaojun Lu, Xiaoming Wu, Yuzhen Sun, Wei Yin: The Role of Swelling Pressure in the Shear Strength Theory of Unsaturated Soils. Chinese Journal of Geotechnical Engineering, Vol. 5(1997), pp.20-27. In Chinese

[6] Huaqiang Han, Shengshui Chen: A Study on Strength and Deformation of Expansive Soils. Chinese Journal of Geotechnical Engineering, Vol. 3(2004), pp.422-424. In Chinese

[7] Qing Yang, Huizhen Zhang, Maotian Luan: Testing Study on Shear Strength of Unsaturated Expansive Soils. Chinese Journal of Rock Mechanics and Engineering, Vol.3(2004), pp.420-424. In Chinese

[8] Zhenzhou Ding, Yingren Zheng, Lisheng Li: Trial Study on Variation Regularity of Swelling Force. Rock and Soil Mechanics, Vol. 7(2007), pp.1328-1331. In Chinese

[9] Dongmei Liu, Chaoma Liu: The Mechanism of the Expansive Clays' Swelling-shrinkage Deformation and Its Engineering Application. Journal of Southern Institute of Metallurgy, Vol. 2(1999), pp.69-73. In Chinese

[10] Luorong Tan, Lingwei Kong: Study on Variation Regularity of Swelling Behavior of Expansive Soil. Rock and Soil Mechanics, Vol. 10(2004), pp.1555-1559. In Chinese