Workers building the Xuan’an-Hefeng Expressway in Hubei Province, Central China, discovered large karst caves during the laying of the Lei Jiaping and Taiping tunnels.
Currently, caves are being studied by specialists. The total length of the cave in the Leijaping tunnel is 62 m, the depth is almost 56 m, and the maximum width is about 50 m; The length of the cave in the Taiping tunnel is 140 m, the width is almost 80 m, and the depth is about 60 m