A Study of the Coupled Hydromechanical Behavior of Jointed Rock Masses Around Pressure Tunnels
Alvarez, Tirso Antonio
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https://hdl.handle.net/2142/83430
Description
Title
A Study of the Coupled Hydromechanical Behavior of Jointed Rock Masses Around Pressure Tunnels
Author(s)
Alvarez, Tirso Antonio
Issue Date
1997
Doctoral Committee Chair(s)
Cording, E.J.
Department of Study
Civil Engineering
Discipline
Civil Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Applied Mechanics
Language
eng
Abstract
In fractured rock masses with continuous joints which daylight middle to steeply inclined valley walls $(\beta>20\sp\circ),$ failure by hydrojacking was preceded by sliding of a wedge toward the valley side and opening of steep joints. This observation was used to formulate a criterion for failure whose premise is that global hydrojacking occurs when steeply dipping joints open as movement of the wedge begins along shallow dipping joints. A cover criterion was derived from the stability of rock wedges which incorporates the attitude and strength of the joint sets and the inclination of the valley walls. The Norwegian minimum cover criterion is recovered as a special case of this new criterion.
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