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|Title:||Behavior of lined openings in jointed and unjointed model rock masses|
|Authors:||United States. Army. Office of the Chief of Engineers.|
Wallace, James G.
|Keywords:||Joints and jointing (geology)|
|Publisher:||Weapons Effects Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
|Series/Report no.:||Technical report (U.S. Army Engineer Waterways Experiment Station) ; N-73-6.|
Abstract: The objective of this investigation was to study experimentally the behavior of horizontally oriented, steel-lined cylindrical openings in jointed and unjointed model rock masses subjected to static surface overpressures. The results of six model tests are presented and discussed herein. Three of these tests were conducted on virgin jointed model rock masses containing steel-lined cylindrical openings. The other three tests were repeated loadings of an unjointed model rock mass containing a steel-lined opening. The boundary conditions were approximately plane stress conditions in all cases. The development of jointed model rock masses and the required instrumentation are also described herein. The behavior of the steel liners was measured with circumferential strain gages and diametric extensometers. The freefield response was measured with SE-type stress even widely spaced joints drastically influence of the tunnel liner, but that the thrust is not gages. Test results indicated that the moments and diametrical movements so grossly affected.
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