The picture shows the Liuyang River Tunnel of the Beijing-Guangzhou High-speed Railway
Nowadays, China has built the world's largest high-speed rail network, and its strength in high-speed rail related technologies is also ranked first in the world, as we all know that There are several large rivers in China, so China has built several high-speed rail cross-river tunnels, and the largest span in the world is the Liuyang River Tunnel on the Beijing-Guangzhou high-speed railway! This tunnel is located in Liuyang River underground 70 meters, span of 11 kilometers, the beginning of the completion of the global attention, there are Western experts lamented that China to build this super tunnel difficulty can not imagine, to know that the construction requirements of high-speed rail tunnels are much higher than ordinary train tunnels, the overall construction difficulty is very high, China can successfully build this tunnel can be said to perfectly reflect China's current strong strength.
The picture shows the Beijing-Guangzhou high-speed railway
In order to meet the travel requirements of the Chinese people, in recent years China has been vigorously building a high-speed rail network, the Beijing-Guangzhou high-speed rail is one of the most important, this high-speed rail along the way through the Yellow River Yangtze River and other large rivers, built a lot of cross-river tunnels, Liuyang River tunnel is one of the largest span, the span of this tunnel reached 11 kilometers, from the underground through the Liuyang River and the river bank near a number of important urban areas, the deepest part of the tunnel is located in the Liuyang River bed 70 meters, is currently the world's largest span, the deepest depth, The most difficult comprehensive construction is the world's premier high-speed rail cross-river tunnel.
In order to build this tunnel, the Chinese engineering team spent a lot of thought, first of all, the local geological situation of the Liuyang River is not optimistic, the area where the Liuyang River is located is a famous geological complex area, the geological conditions are very harsh, the geological conditions under the riverbed are also very poor, the soil viscosity is very high, it is difficult to use the shield machine to excavate, and it is also mixed with a large number of high-hardness gravel, which puts forward a huge problem for the construction of the project, and the Chinese team is not intimidated by these problems, in order to build this tunnel, The Chinese engineering team made very meticulous preparations before construction, including a detailed survey of the geological structure of the construction site, a detailed construction plan and an emergency disposal plan, and mobilized a large number of advanced equipment to support before the tunnel construction began.
In the project, the Chinese engineering team also encountered a lot of unintended problems, such as the local soil structure is more loose than expected, resulting in a large amount of river water or groundwater infiltration into the inside of the tunnel, and in order to solve these problems, the engineering team also thought of many ways, such as enhancing the waterproof ability of the tunnel, laying multi-layer waterproof materials and water diversion facilities, quickly exporting the water that infiltrated into the tunnel to the outside of the tunnel, and finally after arduous efforts to open the tunnel, so that the Beijing-Guangzhou Railway can be fully penetrated.
The picture shows the marshalling station of the Beijing-Guangzhou Railway
After the tunnel was opened, the Beijing-Guangzhou Railway achieved full penetration, becoming a high-speed rail artery connecting the north and south of China, and its completion greatly promoted China's economic development.
Although on the surface, the operating speed of high-speed rail is not as good as that of civil aviation passenger aircraft, but because most of the high-speed rail stations are built closer to the city, and after the passage time in the urban area, the total speed of high-speed rail has advantages over civil aviation passenger aircraft, so now high-speed rail has become a new choice for most people to travel.