Effect of Variable Confining Pressure on Cyclic Triaxial Behavior of K0-consolidated Soft Marine Clay

Lei Sun

Abstract


The effect of variable confining pressure (VCP) on the cyclic deformation and cyclic pore water pressure in K0-consolidated saturated soft marine clay were investigated with the help of the cyclic stress-controlled advanced dynamic triaxial test in undrained condition. The testing program encompassed three cyclic deviator stress ratios, CSR=0.189, 0.284 and 0.379 and three stress path inclinations ηampl=3,1 and 0.64. All tests with constant confining pressure (CCP) and variable confining pressure (VCP) have identical initial stress and average stress. The results were analyzed in terms of the accumulative normalized excess pore water pressure rqu recorded at the end of each stress cycle and permanent axial strain, as well as resilient modulus. Limited data suggest that these behavior are significantly affected by both of the VCP and CSR. For a given value of VCP, both of the pore water pressure rqu and permanent axial strains are consistently increase with the increasing values of CSR. However, for a given value of CSR, the extent of the influence of VCP and the trend is substantially depend on the CSR.


Keywords


Soft Marine Clay; K0-Consolidated; Cyclic Stress Ratio; Stress Paths; Cyclic Deformation; Pore Water Pressure.

References


Idriss, Izzat M., R. Dobry, and R. D. Singh. "Nonlinear behavior of soft clays during cyclic loading." Journal of the Geotechnical Engineering Division 104.12(1978):1427-1447.

Vucetic, Mladen, and R. Dobry. "Degradation of Marine Clays under Cyclic Loading." Journal of Geotechnical Engineering 114.2(1988):133-149. doi: 10.1061/(ASCE) 0733-9410(1988)114.

Zhou, Jian, and X. Gong. "Strain degradation of saturated clay under cyclic loading." Canadian Geotechnical Journal 38.1(2001):208-212. doi:10.1139/t00-062.

Mortezaie, Ahmadreza, and M. Vucetic. "Threshold Shear Strains for Cyclic Degradation and Cyclic Pore Water Pressure Generation in Two Clays." Journal of Geotechnical & Geoenvironmental Engineering 142.5(2016):04016007. doi: 10.1061/(ASCE) GT.1943-5606.0001461.

Yasuhara, Kazuya, T. Yamanouchi, and K. Hirao. "CYCLIC STRENGTH AND DEFORMATION OF NORMALLY CONSOLIDATED CLAY." Soils & Foundations 22.3(1982):77-91. doi:10.3208/sandf1972.22.3_77.

Ansal, Atilla M., and A. Erken. "Undrained Behavior of Clay Under Cyclic Shear Stresses." Journal of Geotechnical Engineering 115.7(1989):968-983. doi: 10.1061/(ASCE)0733-9410(1989)115:7(968).

D. W. Hight, J. B. Burland, and V. N. Georgiannou. "Behaviour of clayey sands under undrained cycle triaxial loading." Géotechnique 41.3(1991):383-393. doi: 10.1680/geot.1991.41.3.383.

Hyde, Adrian F. L., K. Yasuhara, and K. Hirao. "Stability Criteria for Marine Clay under One-Way Cyclic Loading." Journal of Geotechnical Engineering 119.11(1993):1771-1789. doi: 10.1061/(ASCE)0733-9410(1993)119:11(1771).

Andersen, K. Cyclic clay data for foundation design of structures subjected to wave loading. Cyclic Behaviour of Soils and Liquefaction Phenomena. 2004. doi: 10.1201/9781439833452.pt5.

Boulanger, Ross W., and I. M. Idriss. "Liquefaction Susceptibility Criteria for Silts and Clays." Journal of Geotechnical& Geoenvironmental Engineering 132.11(2006):1413-1426. doi:10.1061/(ASCE)1090-0241(2006)132:11(1413).

Li, Ling Ling, H. B. Dan, and L. Z. Wang. "Undrained behavior of natural marine clay under cyclic loading." Ocean Engineering 38.16(2011):1792-1805. doi.org/10.1016/j.oceaneng.2011.09.004.

Mortezaie, Ahmad Reza, and M. Vucetic. "Effect of Frequency and Vertical Stress on Cyclic Degradation and Pore Water Pressure in Clay in the NGI Simple Shear Device." Journal of Geotechnical & Geoenvironmental Engineering 139.10(2013):1727-1737. doi.org/10.1061/(ASCE)GT.1943-5606.0000922.

Guo, Lin, et al. "Undrained deformation behavior of saturated soft clay under long-term cyclic loading." Soil Dynamics & Earthquake Engineering 50.7(2013):28-37. doi.org/10.1016/j.soildyn.2013.01.029.

Gu, Chuan, et al. "Undrained cyclic triaxial behavior of saturated clays under variable confining pressure." Soil Dynamics & Earthquake Engineering 40.3(2012):118-128. doi.org/10.1016/j.soildyn.2012.03.011.

Priest J A, Powrie W, Yang L, et al. Measurements of transient ground movements below a ballasted railway line[J]. Géotechnique, 2015, 60(9):667-677. doi.org/10.1680/geot.7.00172.

Rascol E. Cyclic properties of sand: dynamic behaviour for seismic applications [J]. . PhD thesis. Lausanne, The Swiss: Swiss Federal Institute of Technology in Lausanne; 2009. doi: 10.5075/epfl-thesis-4546.

Allen, J.J., and Thomson, M.R. 1974. Resilient response of granular materials subjected to time dependent lateral stresses. Transportation Research Record 510, pp. 1–13.

Brown, S.F., and Hyde, A.F.L. 1975. Significance of cyclic confining stress in repeated load triaxial testing of granular material. Transportation Research Record 537, pp. 49–58.

RondóN, H. A., et al. "Comparison of Cyclic Triaxial Behavior of Unbound Granular Material under Constant and Variable Confining Pressure." Journal of Transportation Engineering 135.7(2009):467-478. doi:10.1061/(ASCE)TE.1943-5436.0000009.

Cai, Yuanqiang, et al. "One-Way Cyclic Triaxial Behavior of Saturated Clay: Comparison between Constant and Variable Confining Pressure." Journal of Geotechnical & Geoenvironmental Engineering 139.5(2013):797-809. doi.org/10.1061/(ASCE) GT.1943-5606.0000760.

Sun, Lei, C. Gu, and P. Wang. "Effects of cyclic confining pressure on the deformation characteristics of natural soft clay." Soil Dynamics & Earthquake Engineering 78.9(2015):99-109. doi.org/10.1016/j.soildyn.2015.07.010.

Sun, Qi, et al. "Effect of variable confining pressure on cyclic behaviour of granular.” Canadian Geotechnical Journal 54.6(2017). doi.org/10.1139/cgj-2016-0439.

Gu, Chuan, et al. "Deformation characteristics of overconsolidated clay sheared under constant and variable confining pressure." Soils & Foundations 56.3(2016):427-439. doi.org/10.1016/j.sandf.2016.04.009.

Cai, Y. Q., et al. "Stress–strain response of soft clay to traffic loading." Géotechnique 67.5(2016). doi.org/10.1680/jgeot.15.P.224.

Zergoun, M., and Y. P. Vaid. "Effective stress response of clay to undrained cyclic loading." Canadian Geotechnical Journal 31.31(1994):714-727. doi.org/10.1139/t94-083.

Sakai, Akira, L. Samang, and N. Miura. "PARTIALLY-DRAINED CYCLIC BEHAVIOR AND ITS APPLICATION TO THE SETTLEMENT OF A LOW EMBANKMENT ROAD ON SILTY-CLAY." Soils & Foundations 43.1(2003):33-46. doi.org/10.3208/sandf.43.33.

Simonsen E, Isacsson U. Soil behavior during freezing and thawing using variable and constant. [J]. Canadian Geotechnical Journal, 2001, 38(4):863-875.

Soralump, Suttisak, and J. Prasomsri. "Cyclic Pore Water Pressure Generation and Stiffness Degradation in Compacted Clays." Journal of Geotechnical & Geoenvironmental Engineering 142.1(2016):04015060. doi.org/10.1061/(ASCE)GT.1943-5606.0001364.

ANDERSEN, K. H. "Cyclic and static laboratory tests on Drammen clay." Journal of the Geotechnical Engineering Division 106.5(1980):499-529. doi.org/10.1016/0148-9062(81)90316-8.

Tan, K., and M. Vucetic. "Behaviour of medium and low plasticity clays under cyclic simple shear conditions: Soil Dynamics and Liquefaction, Proc 4th International Conference on Soil Dynamics and Earthquake Engineering, Mexico City, 23–26 October 1989, P131–141. Publ Southampt." International Journal of Rock Mechanics & Mining Sciences & Geomechanics Abstracts 28.6(1991):A342. doi.org/10.1016/0148-9062(91)91220-L.


Full Text: PDF

DOI: 10.28991/cej-0309130

Refbacks

  • There are currently no refbacks.




Copyright (c) 2018 lei sun

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
x
Message