The Effect of Intersection Angle on the Failure Mechanism of Utility Tunnel

<div>Surveying lines layout. <i>S</i>1 = surveying line 1; <i>S</i>2 = surveying line 2; <i>S</i>3 = surveying line 3; <i>S</i>4 = surveying line 4; <i>S</i>5 = surveying line 5; <i>S</i>6 = surveying line 6; <i>S</i>7 = surveying line 7; <i>S</i>8 = surveying line 8; <i>S</i>9 = surveying line 9.</div>

Advances in Civil Engineering

fig6

Figure 6

Figure 6: The Effect of Intersection Angle on the Failure Mechanism of Utility Tunnel 