Journal Articles (Geotechnical & Geoenvironmental Engineering)

1963

Morgenstern, N. R.

Stability charts are presented to facilitate the computation of the factor of safety of earth slopes during rapid drawdown. As the reservoir level is lowered, the factor of safety decreases if it be assumed that no dissipation of pore pressure occurs during drawdown. Pore pressures during...

1994

Robertson, P. K., Sego, D. C., Sasitharan, S., Morgenstern, N. R.

1985

Guenot, A., Morgenstern, N., Kaiser, P. K.

Tests on small circular openings have been conducted to investigate the deformation processes near tunnels at large depth or in weak rock. The test equipment has been described in Part 1; typical test results documenting the behaviour of small tunnels in a jointed rock mass with time-dependent...

1988

Wong, R. C. K., Kaiser, P. K.

Ground deformations around axisymmetric shafts cannot be determined with the design approaches currently available, which are mostly based on plasticity methods. The convergence–confinement method (usually applied to tunnels), with consideration of gravitational effects and the three-dimensional...

2000

Mahmoud, M., Woeller, D., Robertson, P. K.

Abstract: The detection of shear zones along which a mass of soil is moving is essential for understanding the state of stability of natural slopes. Weaker zones in clay soils can be identified from low values of cone penetration test (CPT) tip resistance measured during penetration. This paper...

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...

2010

Lan, H., Hu, B., Martin, C. D.

A grain-based Universal Distinct Element Code model was developed to generate a deformable polygonal grain-like structure to simulate the microstructure of brittle rock. It takes into account grain-scale heterogeneity including microgeometric heterogeneity, grain-scale elastic heterogeneity, and...

2011

Scott, J. D., Sego, D. C., Zarnani, S.

Abstract: Temperatures were measured along instrumented geogrids to determine thermal strains and their changes with seasonal temperatures. It was observed that the application of temperature correction to the measured strain values by electrical wire resistance (EWR) strain gauges to compensate...

1993

Chan, D. H., Tannant, D. D., Kaiser, P. K.

Abstract: During an excavation-response experiment performed at the Underground Research Laboratory (Atomic Energy of Canada Limited, Pinawa, Man.) a decrease in fracture-zone transmissivity was measured as a tunnel intersected the room 209 fracture zone. The decrease in transmissivity was...

2009-01-01

Lato, M., Hutchinson, D. J., Harrap, R. , Diederichs, M. S., Ball, D.

Geotechnical hazards along linear transportation corridors are challenging to identify and often require constant monitoring. Inspecting corridors using traditional, manual methods requires the engineer to be unnecessarily exposed to the hazard. It also requires closure of the corridor to ensure...