North China Kunming China China old one belt, one road, old fellow railway, Vientiane, China and Laos, more than 1000 km long, is the first international railway to invest and build in China, adopt China's technical standards, use Chinese equipment and connect directly with China's railway network. After completion and opening to traffic, Kunming, China and Vientiane, Laos are expected to arrive on the same day. At the 60th anniversary time of the establishment of diplomatic relations between China and Laos, the old and Chinese Railways will soon be opened to traffic. A "green giant" will cross the mountains and rivers, carrying friendship, happiness and opportunities, and will link closely the old fellow railways along the old fellow railways. The road of innovation, overcoming difficulties Since the whole line was started in December 2016, more than 20 thousand builders of the old fellow railway have been fighting for more than 1800 days and nights. The old fellow railway area is known as the "Geological Museum". The complicated geological structure not only causes the builders to face the risk of high ground stress, high ground heat and high earthquake intensity, but also deal with adverse geological hazards such as collapse, surge and deformation. Here is "Flame Mountain". Xishuangbanna tunnel has a total length of 10.7 km. The stratum has high thermal characteristics, and the operating temperature in the tunnel is as high as 40 ℃ all year round. Zhou Jun, manager of Yumo Railway Project Department of CCCC second navigation bureau, recalled that during construction, high-power fans continued to supply air to the tunnel, and ice was pulled into the tunnel by car, transporting more than 20 tons a day. Every time the workers work for a period of time, they have to go to the ice shelf to cool down and prevent heatstroke, and then work after rest. There is a "water curtain hole". The access tunnel at the junction of Yuanjiang County and Mojiang County in Yunnan Province is 11.3km long. The water gushing in the tunnel forms a waterfall. In serious cases, the average water gushing per day is about 40000 cubic meters, which can fill 17 standard swimming pools. Fu Jun, deputy manager of Yumo Railway Project Department of China Railway fifth Bureau, said that water, sweat and mist are intertwined in the tunnel, and dry clothes often go in and wet clothes go out. In the high temperature section, water turns into water vapor, and the humidity is as high as 80%. Workers work like in a sauna. Here is "steel twist". Wanhe tunnel, with a total length of 17.44 km in Eshan County, Yuxi City, is located in a typical soft rock large deformation stratum. In 2019, high ground stress and unfavorable geology led to 520m continuous large deformation of No. 3 inclined shaft, the supporting structure was damaged, and the steel arch used for support was twisted into "twist". Recalling the scene at that time, Li Feng, manager of Yumo Railway Project Department of China Railway 12th Bureau, was still terrified. The construction is difficult and the construction standard is high. The builders have written history with struggle and innovation. On the train with a speed of 160 kilometers per hour, a coin stands firmly on the windowsill. 1. 2, 3... 20 seconds later, the coin did not move. The coin does not fall, reflecting a value - track quality index. The smaller the index is, the straighter the track is and the more stable the train runs. The average speed of trains in general is about 7, while the track quality index of the old fellow railway reaches 2.5 of the lowest value. High standards are inseparable from the builders' excellence. In order to reach the specified value, the fine adjustment construction personnel shall correct each sleeper and "compete" with a few tenths of a millimeter every day to ensure that one place is fine adjusted and one place meets the standard. Green Road, ecological priority There is a "net red" station on the old fellow railway, the wild elephant valley station. Yexianggu station, located in Jinghong City, Xishuangbanna Dai Autonomous Prefecture, is adjacent to the Asian elephant nature reserve. How to minimize the impact of railway construction on Asian elephants? From design to construction, the builders took great pains. At the beginning of the design, with the cooperation of local governments and forestry departments, relevant departments and units investigated the distribution and migration channels of Asian elephants, and finally decided to avoid the main activity areas of Asian elephants. At the same time, in order to increase the activity channel of Asian elephants, builders built bridges or tunnels instead of laying railways in some possible activity areas of elephants. There are 16 roads to bridges and 8 roads to tunnels, so that elephants can pass under the bridge or at the top of the tunnel. Although the construction cost has increased, it has ensured that the activity area of Asian elephants along the line will not be occupied. To protect the Asian elephant, there is another warm detail. Yang Jie, engineer of bridge maintenance engineering center of Pu Erh infrastructure section, introduced that the Asian old fellow railway has added 42.9 kilometers of Asian elephant fence and 1908 meter sound barrier to prevent the Asian elephants from entering the train running area. Unlike the general protective fence, the thorn roll cage at the top of the Asian elephant protective fence will face the thorn tip inward. Even if an elephant is close to the fence, it will not be stabbed. As an electrified railway, more than 900 km of transmission lines have been built along the old fellow railway line. How to transport building materials to the top of the mountain without destroying the forest? Yunnan Xishuangbanna Power Supply Bureau of China Southern Power Grid came up with a traditional method - horse pack. "The weight of tower materials required by an iron tower is more than 30 tons, and there are an average of 13 horses in a caravan. It takes two days to transport a base of tower materials from 6 a.m. to 7 p.m." Xiao Wujun, deputy manager of the planning and construction management center of Xishuangbanna Power Supply Bureau, said that the Banna section has high mountains, dense forests and steep terrain, so the highway can't reach the tower base. You can't cut down trees to build transportation channels. Caravan pack transportation is the best choice. In order to build an ecological road of harmonious coexistence between man and nature, the builders have formed a set of perfect green processes from the aspects of optimized route selection, scientific construction and environmental protection measures: design and planning to avoid the core areas, buffer zones and environmental sensitive points of various nature reserves; Strictly recycle construction waste during construction; More than 28.6 million shrubs, about 40000 vines and about 63000 trees are planted along the line Speed up development on the road of opening up This year is the 60th anniversary establishment of diplomatic relations between China and Laos. The opening of the old fellow railway is another important witness of the profound friendship between the two countries. "Old fellow train is open, and we can learn from Kunming by train." Li Hewei, a teacher of Career Technical College, old fellow, is looking forward to the upcoming China Railway. Last year, Li Hewei and 39 other Lao teachers successfully passed the examination organized by the Lao Ministry of education and became teachers of the Lao Railway Vocational and technical college assisted by China. At present, 40 Lao teachers have completed relevant procedures and will come to Kunming to study as soon as the end of this year. As a landlocked country, Laos has only a 3.5km long railway, and there is a shortage of railway professional and technical personnel. At the request of the Lao government, in April 2019, the national agency for international development and cooperation officially approved the project of "assisting Laos Railway Vocational and Technical College". Kunming Railway Vocational and technical college will take 7 years to help Laos establish a mature railway technology training system and reserve Laos' own railway talents with reference to China's vocational education model. "The old fellow railway will be opened to traffic and will help to build the old economic corridor and promote the economic and social development of Laos to a new stage." Manila Songbandi, Consul General of Laos in Kunming, said. Along the line and radiation area, we must seize the new opportunities of the opening of the old fellow railway. Home furnishing more than 1400 forest enterprises in Puer City, with the opening of the old fellow railway, Puer plans to invest 3 billion yuan to build a forest board Home Industrial Park in the Ning'er industrial area of Pu'er Industrial Park to expand the market in South Asia and Southeast Asia. At the same time, various favorable policies are also helping to smooth trade. Kunming area of China (Yunnan) pilot Free Trade Zone signed the joint innovation cooperation agreement with Laos Mohan moding Economic Cooperation Zone, carried out cooperation in 8 aspects such as cross-border e-commerce, and launched the first batch of 10 "cross regional general affairs"; Kunming customs has issued 13 measures to continuously improve the customs clearance facilitation level of Mohan railway port. Through all the channels, the old fellow railways are like the surging "arteries", which are injecting new development momentum into all parts of the country. (outlook new era)