Study on Static Mechanical Properties of Naturally Immersed Red Sandstone under Triaxial Compression
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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