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Keywords: stiffness
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Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-527
... Characterization principal stress fracture pattern variation situ stress fracture splay magnitude variation main fracture stiffness distinct element method THE EFFECT OF FRACTURE PATTERN ON IN SITU ROCK STRESSES STUDIED BY THE DISTINCT ELEMENT METHOD Shengrui Su1 , Ove Stephansson2 and Jianbing Peng3...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-600
... ABSTRACT: The shear behaviour of grouted joints has been studied in the recent past using the conventional direct shear apparatus, where the normal load on the joint plane is kept constant during testing. The Constant Normal Stiffness (CNS) condition is adopted in this study of shear behaviour...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-557
..., poor penetrability in stiff soils and obstructions, limited pipe inclination, complication of wall performance affected by reaction system and difficulties in backfilling the voids after removal of pipes. This paper discusses the design concept, problems associated with the installation methods...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-615
... UDECTM (1999), under plane strain conditions. These rock roofs contain vertical joints of varying frequency of occurrence and material compliance. frequency Reservoir Characterization joint stiffness voussoir beam rock beam joint frequency extreme strain thrust line cross section abutment...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-274
... ABSTRACT: In this paper an attempt has been made to simplify the complex interface pullout mechanism using nonlinear elastic formulations. Formulations of interface pullout tests are expressed in non-dimensional terms for general applicability. Concepts of relative stiffness and displacement...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-289
... are into two parts i.e backfill and infill soils. rajagopal reinforcement rupture plane vertical pressure Artificial Intelligence Bathurst reinforcement layer assumption stiffness current design procedure stability calculation reinforcement force Design Procedure finite element evaluation...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-124
... crack tensor excavation stiffness deformation normal stiffness numerical result hydraulic fracturing aperture hydraulic conductivity Nonlinear Elasticity equation drift wall fracture fractured rock mass COUPLED HYDRAULIC AND MECHANICAL MODEL WITH NONLINEAR ELASTICITY OF FRACTURED ROCK...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-145
... initial void ratio stiffness collapse potential oedometer test hydrocollapse artificial loess settlement COLLAPSE BEHAVIOUR OF LOESS SOILS Harriet Miller1, Youcef Djerbib2, Ian F. Jefferson3 and Ian J. Smalley4 ABSTRACT Loess soils cover approximately 10% of the world s landmass. This quaternary...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-231
... ABSTRACT: The kinematic nature of small-strain stiffness (i.e., elastic modulus) of a granular soil was investigated by performing segmental triaxial compression tests on specimens of Hostun sand. A pause was allowed after each segment of virgin shearing to allow for creep to occur. When...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-203
.... First, to identify the specific effects of each cement on the overall undrained behaviour of the treated soil in triaxial compression. Secondly, to quantify the stiffness of the cemented soil under different testing conditions. Samples of the cemented soil were examined under electron microscopy...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-263
... different static weights and three different eccentricities are used to simulate different vibrating mass and dynamic force level respectively. Two different types of layered systems (soft layer over stiff layer and stiff layer over soft layer) are considered and in each type thickness of top layer...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-220
... the constrained modulus or mv. Upstream Oil & Gas oedometer result variability drilling fluids and materials triaxial cell water content specimen block sample auckland area auckland residual soil diameter conventional oedometer test residual soil stiffness Completion Installation...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-415
... ABSTRACT: The shear behaviour of soft rock joints is investigated in laboratory under both Constant Normal Load (CNL) and Constant Normal Stiffness (CNS) conditions. The laboratory behaviour is modelled numerically using the Universal Distinct Element Code (UDEC). The predicted shear stress...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-331
... ABSTRACT: A new method of in situ ground improvement has been developed involving the precipitation of calcite around soil particles and their contacts to improve strength and stiffness. The technique offers an innovative approach to the stabilisation of London Underground Ltd ash embankments...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-281
... mechanism using finite element analyses and the significance of bending stiffness of soil nails in an excavation in soft residual soils. Finite element analysis and measured field data indicated that bending moment has a significant role in restraining the lateral displacement of the wall during...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-007
... Reservoir Characterization displacement non linearity pile group gazeta loading settlement Upstream Oil & Gas eurocode 8 bearing capacity kinematic interaction Engineering pecker shallow foundation resistance Earthquake Engineering stiffness foundation pile shaft...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-072
... ABSTRACT: A new embanking FEM-analysis method of filldams on soil or soft rock foundations is presented. This method can provide accurate estimations comparative conveniently with only PS-Iogging and bore hole test (or plate loading test) data, taking the stiffness dependencies on both depth...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-120
... ABSTRACT: The continuous surface wave system (CSWS) is a non-intrusive geophysical technique used for evaluating subsurface shear wave velocity profiles. It makes use of Rayleigh (surface) waves that propagate within a zone approximately one wavelength in depth. In ground where the stiffness...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-025
... united states loading displacement Engineer footing stiffness bridge structure capacity curve retrofit ultimate capacity guideline US government retrofit cost foundation vertical load Earthquake procedure foundation element settlement shear wall E A R T H Q U A K E R E S I S T A N T...
Proceedings Papers

Paper presented at the ISRM International Symposium, November 19–24, 2000
Paper Number: ISRM-IS-2000-373
... relaxation loading stiffness reservoir geomechanics reaction pile loading test effective stress surface roughness dilatancy SET-UP OF DRIVEN PILES IN SAND THE EFFECT OF CONSTRAINED DILATANCY DURING LOADING Gary Axelsson1 ABSTRACT The increase in bearing capacity over time (i.e. set-up) of driven...

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