Guangzhou Metro Line 3 Cross Passage in Southern China

Application of cross passage TBM in weathered granite strata

The tunnelling length of cross passage is 37.9 meters long with an overburden of 24.7 meters. It travels through moderately, fully and strongly weathered granite. In view of the challenges such as long distance and complex strata in this project, CREG has independently developed a TBM suitable for this project, based on our own experience and excellent technical know-how. The TBM integrates multiple functions such as launching inside the tunnel, excavation, mucking, support, segment erection and receiving inside the tunnel. It boasts multiple technological innovation features: high maneuverability, high integration, double-cone stepped cutting, profiling cutterhead technology, movable segment pre-stress support technology and low reinforcement environment launching and receiving technology.

Project Background

TBM has been applied to cross passage construction in moderately weathered and weathered granite strata, breaking the common understanding that cross passage TBM can only be applied in soil strata. It has significantly enhanced the applicability of the cross passage TBM and provided solutions to the construction of cross passages.

right side

Guangzhou Metro Line 3 Cross Passage Construction Site

CREG service team at job site

The pilot project enhances the applicability of cross passage TBM