Study on type selection of 9 m shield tunneling machine for intercity railway under complex karst geological conditions

Abstract

In the process of urban underground rail transit engineering construction, suitable shield equipment selection is the key factor of tunnel construction, and the scientific and reasonable design of key equipment components is the core of safe and efficient shield tunneling. There are complex geological problems such as karst, composite strata and long distance hard rock along the tunnel between Shenhui Intercity Longcheng Station and Longling working well. Based on factors such as formation adaptability, construction risk, duration and cost, the type selection of 9 m shield tunneling machine is studied. The result show that EPB/TBM dual-mode shield is feasible, which could provide technical reference for similar formation shield equipment selection.

Keywords

intercity railway / tunnel engineering / shield method / TBM / karst / type selection design