Disease Analysis for Highway Tunnel in Loess and Treatment Countermeasures

On the basis of the disease evolution of Xinzhuangling Highway Tunnel in loess,the disease reasons are analyzed through numerical simulation and field observation.The results show water infiltration results in the decrease of soil strength and the increase of soil deformation.Water infiltration results in the increase of rock plastic area and deformation press.Water infiltration results in the deterioration of mechanical characteristics on lining and the crevices of the lining.Besides,considering the actual disease of the tunnel,the earth's surface splits should be maintained by excavating loess and tamping,the lining splits should be maintained by resin and steel lattice girder implanting.The results provide theory for treating these diseases of highway tunnel in loess.