Menghua railway control project-Yangshan tunnel through

The Yangshan Tunnel, a controlled project of the Menghua railway located in Yan 'an City, was completed on August 10. The tunnel has a total length of 11.7 kilometers and is one of the 10 long tunnels with a length of more than 10 kilometers across the .

The tunnel is designed as a single-hole two-lane tunnel with a maximum burial depth of 277 meters. It is a key test project that was started in advance on the Menghua. Since the start of construction in March 2015, the 20th Bureau of China Railway has successively conquered a number of technical difficulties such as the cracking and deformation construction of weak surrounding rocks, the construction of low gas tunnels, and the construction of soil and stone interfacial seepage and collapse. It is also useful for similar tunnel construction in the future.

It is understood that the Menghua has a total length of 1814.5 kilometers and spans seven provinces and autonomous regions such as Inner Mongolia, Shaanxi, Shanxi, Henan, Hubei, Hunan, and Jiangxi. The estimated investment is 170 billion yuan. It is another long-distance heavy-duty coal transportation in China after the Daqin Railway. channel.