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https://hdl.handle.net/11681/6799| Title: | Geomechanical model study of the behavior of underground openings in rock subjected to static loads. Report 3, Tests on lined openings in jointed and intact rock |
| Authors: | University of Illinois at Urbana-Champaign. Department of Civil and Environmental Engineering. United States. Defense Nuclear Agency. Hendron, Alfred Joseph. Engeling, Paul D. Aiyer, Arunachalam Kulathu. Paul, S. L. |
| Keywords: | Geochemicals models Models Rock mechanics Rock properties Static loads Tunnels Underground opening |
| Publisher: | Weapons Effects Laboratory (U.S.) Engineer Research and Development Center (U.S.) |
| Series/Report no.: | Contract report (U.S. Army Engineer Waterways Experiment Station) ; N-69-1 rept.3. |
| Description: | Contract report Abstract: The results of eleven geomechanical model tests are presented and discussed in this report. Six of these tests were on lined tunnels in solid test blocks and the remaining five tests were on lined tunnels in jointed test blocks. The size of the models tested was 24" x 24" x 8". Uniformly distributed loads up to 134 tons were applied to the 24" x 8" faces of the models. To maintain a plane-strain condition in the models, loads of up to 160 tons were applied to the top 24" x 24" face of the model to null strains parallel to the 8 in. dimension. Friction along the loading faces was controlled with sheets of teflon. The developments of jointed models and the instrumentation necessary for maintaining the jointed models are described. The behavior of the tunnel was measured by diametrical extensometers inside the tunnel liners and strain gages mounted on the tunnel liner. Strain measurements of the solid model blocks were made by the use of strain gages mounted on the model material. Average strain measurements of the jointed models were made by the use of buried extensometers. For models tested at a principal stress ratio of 1.0, the observed behavior was analyzed and compared to theoretical predictions. For models tested at a principal stress ratio of 2/3, the data was plotted in dimensionless form and a relation was shown to exist between the ratio of liner to the jointed model stiffness and the ratio of liner to free-field model strain. |
| Rights: | Approved for public release; distribution is unlimited. |
| URI: | http://hdl.handle.net/11681/6799 |
| Appears in Collections: | Contract Report |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| CR-N-69-1-Report-3.pdf | 5.61 MB | Adobe PDF |  View/Open |