Treatment method suitable for landslide section of bridge-tunnel connected tunnel portal

According to the treatment method suitable for the landslide section of the bridge-tunnel connection tunnel portal, the tunnel affected by the landslide passes through the landslide section in an open cut tunnel and dark tunnel combination mode, in order to stabilize a mountain body for a long time, a tunnel front slope is divided into two stages from top to bottom to remove loose soil in a slip crack surface, and the slope is removed; meanwhile, slope brushing reinforcement is conducted by adopting the abrupt slope ratio; the upper section of the tunnel front slope is reinforced through the mortar anchor rods, the lower section of the tunnel front slope is reinforced through the small grouting guide pipes, and the stability of the slope toe is guaranteed; the length of the open cut tunnel is set to be 15-20 m, so that the effects of buffering falling rocks and resisting a mountain body from sliding down can be achieved; in order to weaken the influence of the landslide mass on the bridge in front of the buil