Experimental Study on Shield Tunneling Control in Full Section Water-Rich Sand Layer of Collapsible Loess

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Driving parameters</td><td class="align_center">Optimum control range</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Cutter head torque</td><td class="align_center">5760~6120 (kN/m)</td></tr><tr><td class="align_left">Cutter head speed</td><td class="align_center">0.6~0.9 (r/min)</td></tr><tr><td class="align_left">Chamber pressure</td><td class="align_center">1.3~1.5 (bar)</td></tr><tr><td class="align_left">Bentonite injection volume</td><td class="align_center">1.4~3.8 (m<sup>3</sup>)</td></tr><tr><td class="align_left">Advance speed</td><td class="align_center">20~21 (mm/min)</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Optimum control range of the driving parameters.</div>

Geofluids

tab3

Table 3

Table 3: Experimental Study on Shield Tunneling Control in Full Section Water-Rich Sand Layer of Collapsible Loess 