Canadian Geotechnical Journal
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The 2003 Canadian Geotechnical Colloquium: Mechanistic interpretation and practical application of damage and spalling prediction criteria for deep tunnellingSpalling and strain bursting has long been recognized as a mechanism of failure in deep underground mines in hard rock and in deep infrastructure tunnels. The latter is a significant growth industry, particularly in Europe where subalpine base tunnels in excess of 10 m wide and dozens of kilometres long are being driven by tunnel boring machine (TBM) through alpine terrain at depths greate... ... hiện toàn bộ
Canadian Geotechnical Journal - Tập 44 Số 9 - Trang 1082-1116 - 2007
Seventeenth Canadian Geotechnical Colloquium: The effect of cohesion loss and stress path on brittle rock strength
Canadian Geotechnical Journal - Tập 34 Số 5 - Trang 698-725 - 1997
An interpretation of ground movements recorded during construction of the Donkin-Morien tunnel A tunnel excavated by a tunnel boring machine was monitored extensively by means of extensometers installed near the tunnel face. Consequently, the three-dimensional state existing at the time of installation must be considered for the interpretation of the monitoring data. Results from three-dimensional finite element simulations are used to back-calculate rock mass strength and deformat... ... hiện toàn bộ
Canadian Geotechnical Journal - Tập 28 Số 2 - Trang 239-254 - 1991
Hoek-Brown parameters for predicting the depth of brittle failure around tunnels A review of underground openings, excavated in varying rock masstypes and conditions, indicates that the initiation of brittlefailure occurs when the damage index, Di , expressed as theratio of the maximum tangential boundary stress to the laboratoryunconfined compressive strength exceeds approx0.4. When thedamage index exceeds this value, the depth of brittle failure ... ... hiện toàn bộ
Canadian Geotechnical Journal - Tập 36 Số 1 - Trang 136-151 - 1999
Design and performance evaluation of vertical shafts: rational shaft design method and verification of design method 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 conditions near a shaft, is proposed as a tool to predict formation pressure on a shaft and ra... ... hiện toàn bộ
Canadian Geotechnical Journal - Tập 25 Số 2 - Trang 320-337 - 1988
Specific surface: determination and relevance Specific surface captures the combined effects of particle size and slenderness in a measurement that is independent and complementary to grain-size distribution. There are various methods to measure specific surface, including gas adsorption in dry conditions and selective molecular absorption in aqueous suspensions. The measurement procedure can have an important effect on measured valu... ... hiện toàn bộ
Canadian Geotechnical Journal - Tập 39 Số 1 - Trang 233-241 - 2002
Swelling and softening behaviour of La Biche shale Free swell, semiconfined swell, and one-dimensional oedometer swell tests were performed on La Biche shale specimens in solutions of different salinities. The swelling behaviour of La Biche shale was found to be highly anisotropic and dependent on electrolyte concentration, stress, and swelling history. Drained triaxial compression tests were conducted on La Biche shale specimens subjecte... ... hiện toàn bộ
Canadian Geotechnical Journal - Tập 35 Số 2 - Trang 206-221 - 1998
Generalized dynamic Winkler model for nonlinear soil–structure interaction analysisThe beam on nonlinear Winkler foundation (BNWF) model is widely used in soil–structure interaction (SSI) analysis owing to its relative simplicity. This paper focuses on the development of a versatile dynamic BNWF model for the analysis of shallow and deep foundations. The model is developed as a stand-alone module to be incorporated in commercial nonlinear structural analysis software. Th... ... hiện toàn bộ
Canadian Geotechnical Journal - Tập 45 Số 4 - Trang 560-573 - 2008
Use of the grain-size distribution for estimation of the soil-water characteristic curve The implementation of unsaturated soil mechanics into engineering practice is dependent, to a large extent, upon an ability to estimate unsaturated soil property functions. The soil-water characteristic curve (SWCC), along with the saturated soil properties, has proven to provide a satisfactory basis for estimating the permeability function and shear strength functions for an unsaturated ... ... hiện toàn bộ
Canadian Geotechnical Journal - Tập 39 Số 5 - Trang 1103-1117 - 2002
Erratum : Equations for the soil-water characteristic curve
Canadian Geotechnical Journal - Tập 31 Số 6 - Trang 1026-1026 - 1994
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