Research on displacement prediction of shield tunneling through existing tunnel based on LSSVM

The construction scale of the shield tunnel underpass is expanding day by day. In order to study safety influence and deformation control on existing tunnel, LSSVM model established. Based collected soil storage pressure, foam volume, simultaneous grouting volume other six parameters corresponding sample data bottom displacement, horizontal displacement settlement caused approach are predicted. Taking a subway project as an example, research results show that prediction tunneling under level has strong generalization ability rapid accurate effect. This method can provide reference for similar projects.