Study on Identification of Construction Method for Ultra-Large-Span Tunnel

<table class="table-group" id="tab12"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Item</td><td class="align_center">Quantitative index</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">One-step span</td><td class="align_center">15.9</td></tr><tr><td class="align_left">Overall span</td><td class="align_center">19.9</td></tr><tr><td class="align_left">Number of calculated lateral drift</td><td class="align_center">1.2</td></tr><tr><td class="align_left">Number of determined lateral drift</td><td class="align_center">2.0</td></tr><tr><td class="align_left">Determined one-step excavation span</td><td class="align_center">9.94</td></tr><tr><td class="align_left">Index of surrounding rock stability F</td><td class="align_center">27.81</td></tr><tr><td class="align_left">Stability of surrounding rock</td><td class="align_center">Very stable</td></tr><tr><td class="align_left">Recommended method</td><td class="align_center">CD method</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Calculation results of Malin tunnel construction method.</div>

Advances in Civil Engineering

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Table 12

Table 12: Study on Identification of Construction Method for Ultra-Large-Span Tunnel 