Measurement and Analysis of Deformation of Underlying Tunnel Induced by Foundation Pit Excavation

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2">Maximum uplift</td><td class="align_center">November 27, 2018</td><td class="align_center">The bottom plate was completed on January 11, 2019</td><td class="align_center">Top plate completed on April 21, 2019</td><td class="align_center" colspan="2">100 days after completion of the base plate</td><td class="align_center" rowspan="2">Control value (mm)</td></tr><tr class="thead"><td class="align_center">Accumulated displacement (mm)</td><td class="align_center">Accumulated displacement (mm)</td><td class="align_center">Accumulated displacement (mm)</td><td class="align_center">Deformation value (mm)</td><td class="align_center">Deformation rate (mm/day)</td></tr><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr><td class="align_left">Upward tunnel</td><td class="align_center">5.09</td><td class="align_center">4.46</td><td class="align_center">3.71</td><td class="align_center">−0.75</td><td class="align_center">−0.008</td><td class="align_center">7</td></tr><tr><td class="align_left">Downward tunnel</td><td class="align_center">5.13</td><td class="align_center">4.46</td><td class="align_center">3.85</td><td class="align_center">−0.61</td><td class="align_center">−0.006</td><td class="align_center">7</td></tr><tr class="table-tr"><td colspan="7"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Deformation monitoring results for the lower recumbent tunnel.</div>

Advances in Civil Engineering

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Table 2

Table 2: Measurement and Analysis of Deformation of Underlying Tunnel Induced by Foundation Pit Excavation 