Abstract:

The Baiguowan tunnel crosses underneath DazhouChengdu No. 2 line. The construction technologies, including existing railway reinforced by D beam, advance large roof support in tunnel, tiny step and temporary invert method, blasting control method and lining followed method, are used, so as to ensure the construction safety of Baiguowan tunnel and running existing railway. The paper can provide references for similar projects in the future.

Key words: crossing underneath railway, existing railway line reinforcement, blasting control, lining