Construction
| Thu 22 Oct 2026
Beijing, Oct. 22 -- Hunan Provincial Communications Planning, Survey and Design Institute has secured a patent on Pile-arch Protection Structure Suitable for Multi-arch Tunnel in Bealock Section. Wan Zhiwen, Zhou Jinqiang, Zhou Mi, Yu Gui, Li Jinxin, Sun Yulong, Liu Shu, Wang Jing, Li Ziyu, Zhang Zhaoyuan, Zhao Huixiong, Xie Xio..