The preliminary study of mechanical properties of medium strength sandstone
碩士 === 國立臺灣大學 === 土木工程學系研究所 === 86 === This reserch uses two kinds of medium strength sandstone samples - Dongken sandstone and Nangan sandstone - to determine the mechanical properties of medium strength sandstone by doing a series test including (1)weak...
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| Other Authors: | |
| Format: | Others |
| Language: | zh-TW |
| Published: |
1998
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| Online Access: | http://ndltd.ncl.edu.tw/handle/73791670014324595535 |
| Summary: | 碩士 === 國立臺灣大學 === 土木工程學系研究所 === 86 === This reserch uses two kinds of medium strength sandstone samples -
Dongken sandstone and Nangan sandstone - to determine the mechanical
properties of medium strength sandstone by doing a series test including
(1)weakening test;(2)triaxial test with pure shear path;(3)creep test.
the result of tests show that the uniaxial strength of Dongken
sandstone will decress as the saturation degree of specimen is incress.
Compare with mechanical properties and microscopic characters, we suppose
that the weakening of Dongken sandstone is caused by the decreasing of the
amount of matrix and reduseing the ability of cementation.The result of
triaxial tests show that Nangan sandstone will initially perform volume
compression when suffer shear stress.When shear stress exceed the shear
dilation threshold, the specimen starts to dilate until failure occurs.
the normalized shear dilation threshold is about 0.4.The result of creep
tests show that the creep behavior of Dongken sandstone is controlled by
stress level.
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