Seismic Acceleration Spectrum of Ground Surface under Urban Subway Tunnels with Circular Cross Sections in Soil Deposits Based on SSI

<table class="table-group" id="tab7"><tr><td><table class="table"><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr class="thead"><td class="align_left">No.</td><td class="align_center">Elasticity module of soil (compared to Delhi Metro)</td><td class="align_center">Overburden depth (m)</td><td class="align_center">Lining thickness (m)</td><td class="align_center">Tunnel radius (m)</td><td class="align_center"><i>T</i><sub>n</sub> (sec)</td></tr><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td class="align_left"><b>1</b></td><td class="align_center">1</td><td class="align_center">20</td><td class="align_center">0.75</td><td class="align_center">6</td><td class="align_center">1.973</td></tr><tr><td class="align_left"><b>2</b></td><td class="align_center">2</td><td class="align_center">20</td><td class="align_center">0.5</td><td class="align_center">3.13</td><td class="align_center">1.416</td></tr><tr><td class="align_left"><b>3</b></td><td class="align_center">2.5</td><td class="align_center">20</td><td class="align_center">0.5</td><td class="align_center">3.13</td><td class="align_center">1.267</td></tr><tr class="table-tr"><td colspan="6"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Properties of models that presence of the tunnel amplifies the acceleration spectrum at a distance of 5.83 m from the center of the tunnel projection onto the ground surface.</div>

Shock and Vibration

tab7

Table 7

Table 7: Seismic Acceleration Spectrum of Ground Surface under Urban Subway Tunnels with Circular Cross Sections in Soil Deposits Based on SSI 