Evaluation of the Adaptability of an EPB TBM to Tunnelling through Highly Variable Composite Strata

<table class="table-group" id="tab9"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Target layer</td><td class="align_center" colspan="3">Adaptability of EPB TBM to tunnelling under mixed ground conditions D</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">Criteria layer</td><td class="align_center">EPB TBM design U1</td><td class="align_center">Tunnel construction U2</td><td class="align_center">Geological conditions U3</td></tr><tr><td class="align_left">Index layer</td><td class="align_center">Total thrust V1 (kN) Cutterhead torque V2 (kN∙m) Cutterhead opening ratio V3 (%) Muck amount of screw conveyor V4 (m3/h) Cutter spacing V5 (mm)</td><td class="align_center">Earth pressure in cutterhead chamber V6 (MPa) Wall-back grouting pressure V7 (kPa) Shield tail void V8 (mm)</td><td class="align_center">Composite strata V9 (%) Spherical weathered boulders V10 (m)</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

Mathematical Problems in Engineering

tab9

Table 9

Table 9: Evaluation of the Adaptability of an EPB TBM to Tunnelling through Highly Variable Composite Strata 