Analysis on Key Technologies of Sinking Tunnel Construction Across the Existing Subway

When the sinking tunnel across subway and city pipeline,the deformation control of existing structures is a technical problem. Based on the Huacheng Avenue tunnel of the systems engineering project of the Liede Bridge in Guangzhou City, this article analyze that the difficulty and treatment program of the tunnel construction especially the monitoring of the subway tunnel. The research results can provide important technical support for the safety of operation of existing subways and underground municipal pipelines, which can protect the construction of sinking tunnels or other relevant constructions as well.