Construction Technology of Underpinning of Pile Foundation of Tunnels underneath Crossing Buildings

The pile foundation underpinning procedure and technology are presented,with the file foundation underpinning construction of Baigelong station-Buxin station section on Line 5 of Shenzhen Metro as an example.The importance of the underpinning mode of prestressed concrete beam-and-grider and treatment of self-locking anti-shock node is proved by means of monitoring.The paper can provide reference for similar projects in the future.