Study on the Mechanical Behavior of Double Primary Support of Soft Rock Tunnel under High Ground Stresses and Large Deformation

<div>Rock specimens at XJ1K0 + 270. (a) Surrounding rock. (b) Rock specimens.</div>

Advances in Civil Engineering

Figure 7: Study on the Mechanical Behavior of Double Primary Support of Soft Rock Tunnel under High Ground Stresses and Large Deformation 