Influence of Base Rock Deterioration on Tunnel Bottom Structure Damage under Train Excitation

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr class="thead"><td class="align_left">Particle size ratio (Rmax/Rmin)</td><td class="align_center">Density ρ/(g·cm−3)</td><td class="align_center">Friction coefficient (μ)</td><td class="align_center">Contact modulus of particles (Ec/GPa)</td><td class="align_center">Stiffness ratio of particle (kn/ks)</td></tr><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">1.5</td><td class="align_center">2.7</td><td class="align_center">0.5</td><td class="align_center">0.1</td><td class="align_center">2</td></tr><tr class="table-tr"><td colspan="5"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Microparameters of surrounding rock model.</div>

Advances in Civil Engineering

tab2

Table 2

Table 2: Influence of Base Rock Deterioration on Tunnel Bottom Structure Damage under Train Excitation 