Displacement and Stress Characteristics of Tunnel Foundation in Collapsible Loess Ground Reinforced by Jet Grouting Columns

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr class="thead"><td class="align_left">Type</td><td class="align_center">Parameter’s value</td></tr><tr><td class="thead-hr" colspan="2"><hr/></td></tr><tr><td class="align_left">Water-cement ratio</td><td class="align_center">1 : 1</td></tr><tr><td class="align_left">Pressure (MPa)</td><td class="align_center">20</td></tr><tr><td class="align_left">Flow rate (L/min)</td><td class="align_center">80∼120</td></tr><tr><td class="align_left">Nozzle diameter (mm)</td><td class="align_center">1.6</td></tr><tr><td class="align_left">Outer diameter of the rotary nozzle (mm)</td><td class="align_center">42</td></tr><tr><td class="align_left">Lifting speed (cm/min)</td><td class="align_center">20∼25</td></tr><tr><td class="align_left">Rotation speed (r/min)</td><td class="align_center">20∼22</td></tr><tr class="table-tr"><td colspan="2"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Construction technology parameters of single pipe rotary jet grouting.</div>

Advances in Civil Engineering

tab2

Table 2

Table 2: Displacement and Stress Characteristics of Tunnel Foundation in Collapsible Loess Ground Reinforced by Jet Grouting Columns 