China News Agency, Beijing, December 3 (Reporter Zhou Rui) The China-Laos Railway, which connects Kunming, China, and Vientiane, the capital of Laos, opened on the 3rd. There are four aspects to this project that has attracted much attention.

　　Aspect 1: China-Laos win-win situation

　　After the opening of the China-Laos Railway, plus the port clearance time, passengers can get from Kunming to Vientiane in about 10 hours at the fastest.

Both China and Laos will benefit a lot from this.

　　For Laos, as a "land-locked country" "surrounded" by China, Cambodia, Vietnam, Thailand and Myanmar, and 80% of its land is a mountainous plateau, the opening of the China-Laos Railway will make it a "land-connected country" and further integrate into the world supply chain.

According to media estimates, Laos’ total national income may increase by more than 20% as a result.

　　For China, through the China-Laos railway, it will be able to realize railway connections with Thailand, Malaysia and other countries in the future, and further promote the construction of the “Belt and Road”.

　　Aspect 2: Standard System

　　It is understood that prior to the construction of the China-Laos railway, Lao technicians had limited knowledge of railway construction-related standards.

　　In this case, China did not choose to “impose” the standards on others. On the contrary, China Railway Group specially arranged professionals to provide systematic training to Lao technicians. The system is also clear".

　　Therefore, the adoption of a full set of Chinese technical standards by the China-Laos Railway is a rational choice after Laos has mastered and compared various standard systems.

According to industry insiders, this is essential for China Railways to go global in the next step.

　　Highlight 3: Difficulty of construction

　　The China-Laos Railway is located in the southern extension of the Hengduan Mountains. The line crosses three mountains (Mupan Mountain, Ailao Mountain, Wuliang Mountain) and four rivers (Yuanjiang-Honghe, Amojiang, Babianjiang, Lancangjiang-Mekong), and the terrain conditions are extremely complex. .

The total length of bridges and tunnels across the project is 736.281km, and the proportion of bridges and tunnels is 71.1%, which adds challenges to the construction.

　　Take the Friendship Tunnel that encountered world-class problems during the construction process as an example.

When the two ends of the tunnel were constructed close to the national border, the builders found that the salt rock content increased sharply. After the excavation, the salt content was found to be about 30% on average, and locally as high as 80%.

　　In order to solve this problem, the design team of the China Railway Second Academy conducted theoretical analysis and simulation tests, and gradually improved the treatment plan. Not only did the task successfully complete the task, it also filled the technical gap in the construction of tunnels under this stratum.

　　Aspect 4: Ecological protection

　　During the construction of the China-Laos railway, the builders always uphold the concept of ecological protection.

　　It is understood that, in order to protect the rare animal Asian elephant, the China Railway Second Institute has carried out a comparison and selection of four options including a full tunnel plan, a full bridge plan, bypassing the protected area from both sides, and partial bridge erection.

　　In the experimental area of ​​Xishuangbanna National Nature Reserve, where the China-Laos Railway crossed, the builders adopted optimization projects such as extending the tunnel to reduce surface exposure, adjusting the position of the inclined shaft of the tunnel, and "replacing roads with bridges" to avoid Asia. As the main habitat activity area of ​​elephants, the impact of the project on the migration channel of Asian elephants will be minimized.

　　At the same time, in response to the activity habits of the Asian elephants, the constructors innovated and developed steel rope grille protective fences after repeated scientific experiments.

By setting up protective fences at the entrance and exit of tunnels and the junction of roads and bridges near the reserve to prevent elephants from entering the railway area by mistake.

(over)