Exploration of Tunnel Lining Falling Block Remediation Using Polyurea Material

Tunnel lining falling blocks can cause great threats to traffic safety, resulting in interruptions or speed limits and endangering operational safety. Traditional disease remediation measures have low efficiency high costs are time consuming. Combining the research methods used literature, indoor testing, model experiments, a very normal material, namely, polyurea spray film is proposed as means by which remediate block tunnels. A 1 : tunnel structure was established at site, four experimental conditions were tested. The experiments revealed that tensile stress less than strength no fracture occurred material under joint action of block’s self-weight aerodynamic loads. Factors such side seam treatment, surface sanding, temperature may influence bond material. In order issue falling, we recommended increasing between concrete thickness