Evaluation of Unsaturated Layer Effect on Seismic Analysis of Unbraced Sheet Pile Wall
- 1 Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
- 2 Nature Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
- 3 Nature Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran, Iran
Abstract
This paper is built upon the previous developments on lateral earth pressure by providing a series of analytical expressions that may be used to evaluate vertical profiles of the effective stress and the corresponding suction stress under steady-state flow conditions. Suction stress profile is modeled for one layer sand near the ground above the water level under hydrostatic conditions. By definition, the absolute magnitude of suction stress depends on both the magnitude of the effective stress parameter and matric suction itself. Thus, by developing the Rankine’s relations in seismic state, the composing method of active and passive surfaces in sides of unbraced sheet pile is examinated and the effects of soil parameter on those surfaces are evaluated by a similar process. The relations described the quantitative evaluation of lateral earth pressure on sheet pile and the effects of unsaturated layer on bending moment and embedded depth of sheet pile in soil.
- Okabe, S. (1926) General Theory of Earth Pressure. Journal of Japan Society of Civil Engineers, 12.
- Mononobe, N. and Matsuo, H. (1929) On the Determination of Earth Pressure during Earthquakes. Proceedings of the World Engineering Conference, 9, 176.
- Kramer, S.L. (1996) Geotechnical Earthquake Engineering. Prentice-Hall, Englewood Cliffs, NJ.
- Wu, G. and Finn, W.D. (1999) Seismic Lateral Pressures for Design of Rigid Walls. Canadian Geotechnical Journal, 36, 509-522. https://doi.org/10.1139/t99-013
- Caltabiano, S., Cascone, E. and Maugeri, M. (2000) Seismic Stability of Retaining Walls with Surcharge. Soil Dynamics and Earthquake Engineering, 20, 469-476.
- Nadim, F. and Whitman, R.V. (1983) Seismically Induced Movement of Retaining Walls. Journal of Geotechnical Engineering, 109, 915-931. https://doi.org/10.1061/(ASCE)0733-9410(1983)109:7(915)
- Morrison, E.E. and Ebeling, R.M. (1995) Limit Equilibrium Computation of Dynamic Passive Earth Pressure. Canadian Geotechnical Journal, 32, 481-487. https://doi.org/10.1139/t95-050
- Soubra, A.H. (2000) Static and Seismic Passive Earth Pressure Coefficients on Rigid Retaining Structures. Canadian Geotechnical Journal, 37, 463-478. https://doi.org/10.1139/t99-117
- Kumar, J. (2001) Seismic Passive Earth Pressure Coefficients for Sands. Canadian Geotechnical Journal, 38, 876-881. https://doi.org/10.1139/t01-004
- Choudhury, D. and Subba Rao, K.S. (2002) Seismic Passive Resistance in Soils for Negative Wall Friction. Canadian Geotechnical Journal, 39, 971-981. https://doi.org/10.1139/t02-023
- Choudhury, D., Sitharam, T.G. and Subba Rao, K.S. (2004) Seismic Design of Earth Retaining Structures and Foundations. Current Science, 87, 1417-1425.
- Subba Rao, K.S. and Choudhury, D. (2005) Seismic Passive Earth Pressures in Soils. Journal of Geotechnical and Geoenvironmental Engineering, 131, 131-135. https://doi.org/10.1061/(asce)1090-0241(2005)131:1(131)
- Richards, R. and Elms, D.G. (1979) Seismic Behavior of Gravity Retaining Walls. Journal of the Geotechnical Engineering Division, 105, 449-464.
- Steedman, R.S. and Zeng, X. (1990) The Influence of Phase on the Calculation of Pseudo-Static Earth Pressure on a Retaining Wall. Géotechnique, 40, 103-112. https://doi.org/10.1680/geot.1990.40.1.103