Characteristics of Unloading Creep of Tuffaceous Sandstone in East Tianshan Tunnel under Freeze-Thaw Cycles

<table class="table-group" id="tab6"><tr><td><table class="table"><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr class="thead"><td class="align_left">Freeze-thaw cycles (<i>n</i>)</td><td class="align_center">0</td><td class="align_center">10</td><td class="align_center">20</td><td class="align_center">40</td><td class="align_center">60</td></tr><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td class="align_left">Long-term strength (MPa)</td><td class="align_center">159.8</td><td class="align_center">151.8</td><td class="align_center">140</td><td class="align_center">119.4</td><td class="align_center">108.4</td></tr><tr class="table-tr"><td colspan="6"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Long-term strength of tuffaceous sandstone.</div>

Advances in Materials Science and Engineering

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Table 6

Table 6: Characteristics of Unloading Creep of Tuffaceous Sandstone in East Tianshan Tunnel under Freeze-Thaw Cycles 