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Effects of intermediate principal stress on creep closureof storage caverns in Maha Sarakham salt |
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| รหัสดีโอไอ | |
| Creator | 1. Sarayuth Archeeploha 2. Supattra Khamrat 3. Kittitep Fuenkajorn |
| Title | Effects of intermediate principal stress on creep closureof storage caverns in Maha Sarakham salt |
| Publisher | Research and Development Office, Prince of Songkla University |
| Publication Year | 2560 |
| Journal Title | Songklanakarin Journal of Science and Technology (SJST) |
| Journal Vol. | 39 |
| Journal No. | 2 |
| Page no. | 143 |
| Keyword | rock salt,creep,true triaxial,intermediate principal stress,closure |
| ISSN | 0125-3395 |
| Abstract | True triaxial creep tests are performed to determine the effects of the intermediate principal stress on the timedependentbehavior of the Maha Sarakham salt. The applied octahedral shear stresses vary from 5 to 14 MPa while the meanstress is maintained constant at 15 MPa. The loading conditions include conventional triaxial compression, polyaxial andtriaxial extension testing. Regression analyses of the results based on the Burgers model indicate that the instantaneousdeformation tends to be independent of ?2. The visco-elastic and visco-plastic parameters notably increase with ?2.To calculate the ?2 effect on the long-term closure of salt storage caverns the Burgers parameters are defined as a function ofthe Lode parameter. The results indicate that the conventional creep test results may overestimate the actual closure ofcylindrical and spherical caverns by as much as 15% and 35%, respectively |
