Fig 1.
Dynamic triaxial test system.
Fig 2.
Particle size distribution of silt in the study area.
Table 1.
Physical properties of silt.
Fig 3.
Schematic of soil sample preparation.
Fig 4.
Schematic diagram of axial loading.
Table 2.
Test conditions of salinized silt.
Fig 5.
Relation curve between plastic strain and cyclic vibration times of salinized silt sample(RC=94%, σ3=60 kPa).
Fig 6.
Relationship curve between plastic strain development rate and plastic strain under different salt content.
Fig 7.
The plastic strain εp-end -σd curve at different salt contents when the test stops (N=10000, RC= 94%, σ3=60 kPa).
Fig 8.
Fitting curves of εp-end -σd relation of salinized silt under different confining pressures (RC= 94%, σ3=60 kPa).
Table 3.
Parameter values of εp-end-N relation formula of salinized silty soil with different salt contents.
Table 4.
Dynamic stress amplitude required for the cumulative axial strain to reach 4% at N=10000 times for the sample with different salt content.
Fig 9.
The dynamic stress amplitude-cyclic vibration time curve of silt with different salinity reaches failure strain (σ3=60 kPa).
Table 5.
Fitting parameter values.
Fig 10.
The dynamic stress amplitude-cyclic vibration fitting curve of remolded siltunder different salt content reached the failure strain(σ3=60 kPa).
Fig 11.
Critical dynamic stress curves of samples with different salt content.
Table 6.
Critical dynamic stress amplitude of plastic stability of salinized silt samples with different salt contents.