[Commentary] After the China-Laos (Laos) railway under construction was proposed by the “Belt and Road” initiative, the first investment was made mainly by China, using Chinese technology standards throughout the line, using Chinese equipment, and directly connecting with the Chinese railway network International railway.
【Explanation】 Since the resumption of production and production, tens of thousands of builders have fought hard to ensure the progress of the project. On April 19th, the Jingkuan No. 2 tunnel of the Yu (Xi) Mo (Han) section was opened. This is the first super-large cross-section tunnel running through the entire line and the longest single-line tunnel currently running. A major breakthrough.
[Explanation] Jingkuan No. 2 Tunnel is located in Jinghong City, Xishuangbanna Dai Autonomous Prefecture, Yunnan Province. It has a total length of 4.6 kilometers. The tunnel is adjacent to the Lancang River and has a maximum cross-section of 249 square meters. The tunnel's surrounding rock is broken and fissures developed. It is very easy to soften and collapse when encountering water. It has passed through the shallow buried section many times. The minimum buried depth of the tunnel is only 10 meters, which makes the construction difficult.
[Same period] (Wang Guanying, Project Manager of Yumo Railway Project of the 22nd Bureau of China Railway): Excavation of large sections in broken surrounding rocks is likely to cause difficulties such as deformation and settlement. In the process of (construction), in order to overcome these difficulties, we adopted a four-step construction process to increase the locking feet, divide the section into several units, and finely organize to ensure that the tunnel penetrates as scheduled.
[Explanation] It is understood that the tunnel becomes a single-line tunnel after passing through a super-large cross-section, the excavation cross-section is reduced, and it is difficult to organize the construction through the shallow buried section. Since entering the site in July 2016, construction personnel have struggled to dig forward in a small space. The difficult construction lasted for 3 years and 8 months, and finally passed smoothly.
[Same period] (Yu Youbiao, deputy commander of the Jinghong section headquarters): Our pipeline is a key area for epidemic prevention input. Since the full resumption of production, the headquarters has organized the construction units to grasp the epidemic prevention and control on one hand and the railway construction on the other Sluggishness, highlighting the tough battles between major and difficult projects, achieved a double breakthrough in the construction of physical workload and investment completion tasks.
[Explanation] The China-Laos railway has a length of 508 kilometers and a design speed of 160 kilometers per hour from the Yuxi to Mohan section of the country. After opening to traffic, the China-Laos Railway will become another international railway channel for entry and exit in Southwest China. After the opening, the bus travel time from Kunming to Xishuangbanna only takes about 3 hours.
Dao Zhinan Huang Zaiyun Yunnan Xishuangbanna report
Editor in charge: [Tao Guangxiong]