Construction method for tunnel crossing hole biasing landslide belt

The invention discloses a construction method for a tunnel crossing hole biasing landslide belt, and relates to a hole biasing landslide treatment scheme and a tunnel protection arch cover excavationconstruction method. The method mainly comprises the following two parts that before a tunnel passes through the hole biasing landslide belt, in order to prevent the tunnel construction from disturbing the landslide belt, firstly, the landslide belt is reinforced by adopting a guide pipe grouting and anchor spraying mode, and the anti-skid retaining wall is built to prevent the landslide belt frombiasing sliding; and secondly, before a tunnel hole is excavated, a protection arch is built above the arch portion of the tunnel, the tunnel is subjected to cover excavation under the protection ofthe protection arch, and construction safety is guaranteed. The construction method is suitable for construction of a mountain tunnel and an urban shallow-buried tunnel biasing landslide section tunnel project, the geological c