Support Measures to Prevent the Deformation and Failure of a Carbonaceous Mudstone Tunnel

<table class="table-group" id="tab5"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Test time</td><td class="align_center">1∼15 d</td><td class="align_center">16 d∼1 m</td><td class="align_center">1∼3 m</td><td class="align_center">&gt;3 m</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">Measurement frequency</td><td class="align_center">1–2 times/d</td><td class="align_center">1 times/2d</td><td class="align_center">1∼2 times/w</td><td class="align_center">1∼3 times/m</td></tr><tr><td class="align_left">Monitoring location</td><td class="align_center" colspan="4">Vault, waist, wall, and foot</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr><tr class="table-fn"><td><div>Note. d is day, and m is month.<br/></div></td></tr></table>

Advances in Civil Engineering

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Table 5

Table 5: Support Measures to Prevent the Deformation and Failure of a Carbonaceous Mudstone Tunnel 