Research on Ground Settlement Regularity of Soft Rock Tunnel under Ultrasmall Distance

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr class="thead"><td class="align_left">Materials</td><td class="align_center">Shotcrete</td><td class="align_center">Shape steel</td><td class="align_center">Rock bolt</td><td class="align_center">Secondary lining concrete</td><td class="align_center">Rebar</td></tr><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td class="align_left">Specification</td><td class="align_center">C20</td><td class="align_center">I20a @75 cm</td><td class="align_center"><i>φ</i>22 mm Mortar Anchor <i>L</i> = 3.5 m</td><td class="align_center">C25</td><td class="align_center"><i>φ</i>22 @250 mm</td></tr><tr class="table-tr"><td colspan="6"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Advances in Civil Engineering

tab1

Table 1

Table 1: Research on Ground Settlement Regularity of Soft Rock Tunnel under Ultrasmall Distance 