Experimental Research and Numerical Simulation on Grouting Quality of Shield Tunnel Based on Impact Echo Method

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/sv/volume-2016/1025276/figures/1025276.fig.008a.svgz" name="1025276.fig.008a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>Time-history curve</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/sv/volume-2016/1025276/figures/1025276.fig.008b.svgz" name="1025276.fig.008b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>Frequency</td></tr></table>

<div>Simulation parameters of exciting force.</div>

Shock and Vibration

fig8

Figure 8

Figure 8: Experimental Research and Numerical Simulation on Grouting Quality of Shield Tunnel Based on Impact Echo Method 