Research on Design Parameters and Fatigue Life of Tunnel Bottom Structure of Single-Track Ballasted Heavy-Haul Railway Tunnel with 40-Ton Axle Load

<table class="table-group" id="tab7"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_center" colspan="5">Rise-span ratio</td></tr><tr class="thead"><td class="align_left">Invert thickness</td><td class="align_center">1/8</td><td class="align_center">1/7</td><td class="align_center">1/6</td><td class="align_center">1/5</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">30 cm</td><td class="align_center">48</td><td class="align_center">61</td><td class="align_center">75</td><td class="align_center">92</td></tr><tr><td class="align_left">20 cm</td><td class="align_center">36</td><td class="align_center">43</td><td class="align_center">53</td><td class="align_center">65</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Tunnel service life (years) under different rise-span ratios.</div>

Mathematical Problems in Engineering

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Table 7

Table 7: Research on Design Parameters and Fatigue Life of Tunnel Bottom Structure of Single-Track Ballasted Heavy-Haul Railway Tunnel with 40-Ton Axle Load 

Table 7 | Research on Design Parameters and Fatigue Life of Tunnel Bottom Structure of Single-Track Ballasted Heavy-Haul Railway Tunnel with 40-Ton Axle Load 