Peoples Daily inform Tianzhuang Company successfully breakthrough for Tianzhuang Highway Shentang Tunnel's left tube.

It is challenge tunneling. Unstable rock of collapse risks. Company operated very safe. Company used "five-in-one" monitoring system: "human-vehicle separation system, safety step monitoring, environmental monitoring in the cave, positioning of in-hole personnel, alarm and communication system".

http://gs.people.com.cn/BIG5/n2/2023/0721/c183283-40502245.html