Study on Pore Water Pressure Model of Soft Clay

Abstract:

Based on the consolidated undrained triaxial test of soft clay, a formula for computing pore water pressure is developed, by using of the critical state theory of volume strain and the characteristic normalization of soft clay. It is shown that the new proposed formula is reasonable to reveal the nonlinear stress-strain relationship and the dilatancy characteristics of soft clay. With the comparison between the pore water pressure simulation results by the new formula and the experimental data, it is shown that the simulation values agree well with the experimental data. Meanwhile, based on the failure criterion, a formula for the critical pore water pressure is proposed. It is shown that the new formula is reasonable to simulate the critical pore water pressure. It is very useful to predict the foundation stability.

• Periodical: Advanced Materials Research (Volumes 446-449)
• Pages: 1510-1513
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.446-449.1510
• Online since: January 2012
• Authors: Yong Zhang, Li Wan, Yang Huang, Jia Fu
• Keywords: Nonlinear, Pore Water Pressure, Soft Clay, Stress-Strain Relationship

References

[1] Skepton A W. The Pore-pressure Coefficient A and B[J]. Geotechnique, 1954, 4(4).

[2] Wang Tie-ru, Chen Long-zhu, Li Ming-kui. Studies on Pore Water Pressure Properties of Normally-Consolidatied Clays[J]. Chinese Journal of Geotechnial Engineering, 1987, 9(4):23-32. (In Chinese)

[3] Tsien Shou I, Fu Sheng-cong. Pore water Pressure in Normally Consolidated Saturated Clays[J]. Chinese Journal of Geotechnial Engineering, 1988, 10(1): 1-7. (In Chinese)

[4] Wang Jian-guo, Pu Jia-liu, LI Guang-xin. Study on the Usage of Various Constitutive Models in Predicting Pore Water Pressure[J]. Chinese Journal of Geotechnial Engineering, 1989, 11(5): 51-63. (In Chinese)

[5] Duncan J M, Chang C Y. Nonlinear Analysis of Stress and Strain in Soils[J]. Journal of the Soil Mechanics and Foundation, 1970, 9:1629-1654.

[6] Zhang Yong, Kong Ling-wei, Meng Qing-shan, el. Normalized stress-strain behavior of Wuhan soft clay[J]. Rock and Soil Mechanics, 2006,27(9): 1509-1513, 1518. (In Chinese)