On December 4, 2024, the research results of key technologies and intelligent equipment for the construction of precast tunnel arches by China Construction Eighth Engineering Division were released in Hezhou, Guangxi.

This technology has been successfully applied in the drilling and blasting construction of the Wenzhu Tunnel on the Cangzhao Expressway, achieving the first breakthrough in precast inverted arch technology for integral large volume tunnels.

rebar supports

.