SYMPOSIA PAPER Published: 01 January 1986

Dynamic Pore-Water Pressure in Saturated Dense Sands


In this paper, the law of generation of pore-water pressure in saturated dense sands under uniform cyclic loadings has been studied. Specimens of Cheng-te fine sands with relative density Dr = 0.77 have been tested in a dynamic triaxial apparatus of electromagnetic type under different initial stress states. The experimental results show that under cyclic loadings dense sands also tend to become denser, so the residual pore-water pressure increases as the number of cycles increases, and the relationship between pore-water pressure ratio γu and cyclic number ratio γN may be expressed by a logarithmic function, whereas the cyclic variation of pore-water pressure about a residual pore pressure curve is approximately close to a sine function with the average amplitude depending on the number of cycles to failure. It also has been found that the residual pore-water pressure at failure is always less than confining pressure σ3 and is inversely proportional to the ratio of consolidation stresses Kc.

Author Information

Zhou, J-X
Tsinghua University, Beijing, People's Republic of China
Zhou, K-J
Tsinghua University, Beijing, People's Republic of China
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Developed by Committee: D18
Pages: 122–135
DOI: 10.1520/STP18409S
ISBN-EB: 978-0-8031-4987-8
ISBN-13: 978-0-8031-0490-7