A Simplified Drained Analysis for Wave-Induced Liquefaction in Ocean Floor Sands

Rahman, M.; Jaber, W. Y.

doi:10.3208/sandf1972.26.3_57

Cited by 31 publications

(19 citation statements)

References 14 publications

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“…Some attempts to analyse the pore-pressure generation in a sea-bed are presented by Ishihara and Y a m a~a k i ,~~ Nataraja and Gill34 and Rahman and Jaber. 35 These attempts take into account the influence of cyclic shearing on a pore pressure generation, so are based on a sound physical background. The example presented in this section belongs to the same group of approaches.…”

Section: Pore-pressure Generation In a Sea-bedmentioning

confidence: 99%

Mechanics of a sandy subsoil subjected to cyclic loadings

Sawicki

Świdziński

1989

Num Anal Meth Geomechanics

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SUMMARYA simple model for compaction of a sand, that may be useful in various geotechnical applications is presented. The model has been formulated in terms of the cyclic stress and strain amplitudes. The compaction properties of a dry sand are characterized by a common compaction curve described by two coefficients.The second aim of this paper is to show some applications of the theory proposed. The attention has been restricted to the two extreme cases of practical importance, namely to the behaviour of a dry sand (or a saturated sand but in free draining conditions), and to the behaviour of saturated sand in undrained conditions. Some numerical algorithms showing how to deal with those problems are presented and illustrated on the following examples: settlement and pore pressure generation in a soil stratum subjected to an earthquake, settlement of a foundation, pore pressure generation and liquefaction in a sea-bed.The results obtained suggest that the model proposed, as well as a method of dealing with boundary value problems can serve as a useful tool for the analysis of a sandy subsoil subjected to cyclic loadings.

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Section: Pore-pressure Generation In a Sea-bedmentioning

confidence: 99%

Mechanics of a sandy subsoil subjected to cyclic loadings

Sawicki

Świdziński

1989

Num Anal Meth Geomechanics

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“…It should be pointed out that the solutions given in Equations (11), (12) and (16) are all expressed in terms of the shear stress and therefore are of a general form. The shear stress in any form can be conveniently substituted to get the pore pressure buildup.…”

Section: Analytical Solutionmentioning

confidence: 99%

“…Since the source term in the modi"ed Biot consolidation equation is a function of the peak soil shear stress (and other soil parameters), the approaches developed in the "rst group are normally employed to determine the peak soil shear stress in the soil. Some simpli"ed analytical solutions for one-dimensional consolidation equation are available for uniform and in"nitely deep soil conditions (4,12,13].…”

Section: Introductionmentioning

confidence: 99%

Solutions of pore pressure build up due to progressive waves

Cheng

Sumer

Fredsøe

2001

Num Anal Meth Geomechanics

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SUMMARYThe analytical solution of soil pore pressure accumulations due to a progressive wave is examined in detail. First of all, the errors contained in a published analytical solution for wave-induced pore pressure accumulation are addressed, and the correct solution is presented in a more general form. The behaviour of the solution under di!erent soil conditions is then investigated. It is found that the solution for deep soil conditions is sensitive to the soil shear stress in the top thin layer of the soil. However the solution is signi"cantly in#uenced by the shear stress in the thin layer of soil near the impermeable base, for shallow and "nite depth soil conditions. It is also found that a small error in the soil shear stress can lead to a large error in the accumulated pore pressure. An error analysis reveals the relationships between the accuracy of the pore pressure accumulation and the accuracy of the soil shear stress. A numerical solution to the simpli"ed Biot consolidation equation is also developed. It is shown that the error analysis is of signi"cant value for the numerical modelling of pore pressure buildup in marine soils. Both analytical and numerical examples are given to validate the error estimation method proposed in the present paper.

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“…Saturated sands show an increase in pore pressure under cyclic shear loading in undrained conditions (Seed and Rahman 1978;Rahman and Jaber 1986). The main parameters influencing the increase in pore pressure are the relative density of the sand and the permeability of the sand.…”

Section: Introductionmentioning

confidence: 99%