The construction of the Liliang section of the Yunnan -Tibet Railway has made significant progress

Reporter Deng Kunlun Correspondent Chen Yan

On the morning of July 27, the construction of the Yunnan -Tibet Railway (Jiang) to Xiang (Giri -La) section made significant progress. The penetration has laid a solid foundation for the full tunnel's early penetration.

The Haba Snow Mountain Tunnel is located in the Diqing Tibetan Autonomous Prefecture in Yunnan Province. It has a total length of 9.5 kilometers and the maximum burial depth of the tunnel is 1155 meters. Affected by the high ground stress, the structure of the sector structure, and the fracture band activity, the geological problems such as rock -soluble and soft rock deformation during the construction process were extremely prominent. It was called "the most difficult domestic, the world is rare" by domestic experts.

In order to overcome the problem of large deformation of soft rocks, the builders of the 16th Bureau of China Railway and the joint scientific research of the craftsmanship and the joint scientific research of the colleges and universities invited academicians and experts to go deep into the tunnel to consult the pulse. Essence The middle guide hole is to hit a relatively small hole in the positive hole. During the deformation process, the stress is released, and then the positive hole is expanded. Since the construction of construction, the builders of the 16th Bureau of China Railway have conducted a large number of planning and exploration experiments. The project team has formed a set of large deformation control technical measures to obtain 17 national practical new invention patents, which has accumulated experience in the construction of the plateau railway in my country. Essence

It is reported that the Lixiang Railway is 139 kilometers in length and the design speed is 120 kilometers per hour. After the opening of the traffic, it takes only one and a half hours to Shangri -La to Shangri -La. It takes about 5 hours from Kunming to Shangri -La. The high -quality development of society is of great significance to promote national unity and rural revitalization.

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