Study on Mechanical Characteristics and Control Technology of Surrounding Rock Deformation in Soft Rock Tunnel under High Ground Stress

With the rapid development of the railway and highway tunnel, more and more soft rock tunnels appear continuously under the high ground stress. Because there are characteristics of the large deformation and difficult support in the soft rock tunnel, and the researches, such as deformation characteristics, mechanical characteristics and control technologies, are great meanings to the tunnel in soft rock. To the characteristics of large deformation in deep stratum in Wushao Mountain, combining site test with design and construction in phyllite stratum, and initial support stress, convergence of sidewall and contact stress between initial support and surrounding rock are monitored. The deformation and mechanical characteristics of the tunnel in soft rock are studied under high ground stress and the control technologies of the soft rock tunnel are put forward, which provides a reference for the similar project in future.