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2002
Morgenstern, N. R., Robertson, P. K., Imam, S. M. R., Chan, D. H.
Abstract: In very loose sand, the ratio M-p of shear stress to mean normal stress at the peak point of the undrained effective stress path (UESP) is very close to the stress ratio M at the peak point of the capped yield surface. Stress ratios M-p can therefore be used in constructing yield...
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2002
Zhang, G., Brachman, R. W. I., Robertson, P. K.
Abstract: An integrated approach to estimate liquefaction-induced ground settlements using CPT data for sites with level ground is presented. The approach combines an existing CPT-based method to estimate liquefaction resistance with laboratory test results on clean sand to evaluate the...
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1995
Abstract: A framework for estimating the ultimate undrained steady state shear strength of sand (S-u) from in situ tests, which combines the theory of critical state soil mechanics with shear wave velocity measurements, is presented. For a particular direction of undrained loading, samples of a...
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1997
Christian, H., Morgenstern, N., Chillarige, A. R., Robertson, P. K.
Abstract: Liquefaction flow slides are recurrent phenomena in the Fraser River delta near Sand Heads. The reasons for these failures an unexplained and remained speculative. An investigation of a liquefaction flow slide that occurred in 1985 in the Fraser River near Sand Heads has been undertaken...
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2001
Lord, E. R. F., Hofmann, B. A., Fourie, A. B., Mikular, J., Robertson, P. K.
An opportunity to re–examine the liquefaction potential of hydraulically placed tailings sand has been provided by the Canadian Liquefaction Experiment (CANLEX). As part of this experiment, undisturbed samples of tailings sand were recovered after freezing the tailings in situ. Examination of...
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1995
Abstract: The Berkeley trigger criterion for evaluating the potential for earthquake-induced phenomena in sandy soils is reviewed in this paper. The historical database comprising the criterion is reconsidered using a consistent ''weakest-link-in-the-chain'' approach. Revised plots of average...
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1997
Robertson, P. K., Morgenstern, N. R., Chillarige, A. V., Christian, H.
Abstract: Liquefaction failures of loose sand deposits can be a major concern for the stability of coastal structures. an investigation to evaluate the possible contributions of different triggering mechanisms in a major liquefaction failure that occurred in 1985 at the mouth of the Main Channel...
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1992
Finn, W. D. L., Robertson, P. K., Woeller, D.
Abstract: Impressive progress has been made in the last 25 years in recognizing liquefaction hazards, understanding liquefaction phenomena, and analyzing and evaluating the potential for liquefaction at a site. Recent findings related to the application of the seismic cone penetration test (SCPT)...
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1995
Sego, D. C., Cunning, J. C., Robertson, P. K.
Abstract: Shear wave velocity (V-s) measurements were carried out in a triaxial testing program on three different cohesionless soils. The V-s was measured using bender elements during consolidation and at ultimate steady state. After consolidation the soil samples were loaded in shear under...
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1995
Robertson, P. K., Cunning, J. C., Sego, D. C., Sasitharian, S.
Abstract: The initial state of a sand, defined by the void ratio and effective mean normal stress, can be used to predict its large-strain response. Laboratory studies have shown that the shear-wave velocity of a sand is controlled primarily by the effective confining stresses and void ratio....