To investigate the effect of confining pressure on the static mechanical properties of naturally soaked red sandstone,triaxial compression tests under confining pressures ranging from 0 to 15 MPa were performed on naturally soaked red sandstone.The test results show that under no confining pressure,the stress-strain curve of naturally soaked red sandstone exhibits a distinct compaction stage.However,as the confining pressure increases,the compaction stage no longer appears in the deviatoric stress-strain curve.All the deviatoric stress-strain curves of the samples exhibit a clear yield platform.The peak deviatoric stress,peak strain,and elastic modulus increase with increasing confining pressure,showing a power function increase relationship with the confining pressure.
red sandstoneconfining pressuremechanical properties
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