Three minutes to talk about popular science
China's first west-to-west high-speed railway through the Qinling Mountains93% of the entire line is viaducts and tunnelsIt's tantamount to creating a road out of thin air on top of the moat!
Why is it so difficult to build the Xicheng high-speed railway?At the expense of spending huge sums of money, it is necessary to build it
"Oh, it's dangerous, it's difficult to go to the blue sky."The difficulty of Shu Road is the consensus of mankind for thousands of years, the amazement of the poet Li Bai, the confusion of the ancient Shu kings in governing the country, and the regret that Prime Minister Zhuge has never walked out of his life.
The rugged and difficult road into Shu has troubled the Chinese for thousands of years, even in the 21st century, due to the Qinling Mountains in the high-speed developmentIt also takes nearly 17 hours to take the express train from Xi'an to Chengdu.
The barrier of the Qinling Mountains has turned China's southwest region into a veritable high-speed rail island. Even the northwest region, which has a difficult terrain, already has a line connected to the national high-speed rail network, while the southwest region has only one Chengdu-Chongqing high-speed railway.
Moreover, the Chengdu-Chongqing high-speed railway is still excluded from the national high-speed rail network and is independent of the line in the southwest region. However, in 2017, the birth of a railway broke this embarrassing situationThis is to cross the Qinling Mountains and realize the Xicheng high-speed railway from Xi'an to Chengdu in three hours.
The Xicheng high-speed railway connects Xi'an City, Shaanxi Province, China and Chengdu City, Sichuan ProvinceIt has a total length of 658 kilometers and a maximum speed of 250 kilometers per hourThe nearly 17-hour drive from Xi'an to Chengdu has been shortened to 3 hours. At the same time, this is also the first railway in China that runs through the Qinling Mountains.
There are a total of 22 stations on the Xicheng high-speed railwayScattered on the land of Shaanxi Province and Sichuan Province. Shaanxi and Sichuan, two lands with high exit rates in China's history, have turned the Xicheng high-speed rail line into a tourist guide through China's northwest and southwest regions.
The high-speed rail starts at Xi'an North Railway StationThe route is Afanggong Station, Hubei Station, Hanzhong Station, and then to Guangyuan Station, Jianmenguan Station, and Guanghan North Station in Sichuan ProvinceFinally, we will arrive at Chengdu East Railway Station.
It is not difficult for friends who are familiar with history to find that there are too many historical stories on this route. Whether it is the Afang Palace, which witnessed the rise and fall of the Qin Dynasty, the Jianmen Pass, which is unopenable, or the Sanxingdui of Guanghan that is mysterious and unpredictable, and the history of adding ink, it is the scenery along the Xicheng high-speed railway.
Not only that, the Xicheng high-speed railway has also become a miracle in the history of China's high-speed rail construction. Xicheng Railway in the whole line,The total length of the bridge and tunnel section accounts for 93% of the total length of the whole lineYou can imagine how difficult the construction process was.
The emergence of the Xicheng high-speed railway has made it no longer difficult for the Shu Road to carry the Qinling Mountains, which carry ecological, cultural, historical and other resourcesNo longer an obstacle for people to move forward.
This year marks the sixth anniversary of the opening of the Xicheng high-speed railwayThe second-class ticket price of the Xicheng high-speed rail has always been 263 yuanDo you know why?It turns out that this contains the unique romance of the Chinese.
The Xicheng high-speed railway began in Xi'an, Shaanxi, and ended in Chengdu, Sichuan, Chengdu, the capital of Shu and Han in historyAnd from Chengdu to Xi'an, it is the route of Prime Minister Zhuge Cheng's Northern Expedition. Zhuge Liang made six northern expeditions in his life but did not succeed, and finally left his regrets in Wuzhangyuan.
With the failure of the Northern Expedition,In 263 AD, the Shu Han Dynasty was destroyed, which also marked the complete end of the more than 400-year history of the two Han Dynasty.
In order to commemorate Shu Han and Zhuge Liang,To commemorate the virtue of dedication and death, the second-class ticket price of the Xicheng Railway is set at 263 yuanThe Chinese express their most sincere respect for the ancients in their own unique way.
The road that Zhuge Liang has not completed in his life is indeed difficult. In the five years since the construction of the Xicheng high-speed railway, the construction personnel have also been challenged like never before. The proportion of bridges and tunnels of 93% means that the construction process is difficult, and the Qinling Mountains are in front of us, and if the construction is to be completed, it is necessary to overcome the problem of the Qinling Mountains.
In the whole line of the Xicheng high-speed railway, from the entrance of the Qingliangshan Tunnel to the exit of the Zhaojialing Tunnel, the two places run through the entire Qinling Mountains. In this section of the line,There are seven extra-long tunnels of more than 10 kilometers, with a total length of 110 kilometers.
Among them, the Great Qinling Tunnel is the first tunnel to cross the main mountain range of the Qinling Mountains, with a total length of 148 km,It took three years to complete the construction, and due to the very complex geological conditions, there were many accidents such as rockbursts and water gushings during the construction, and the workers had to wear body armor and steel helmets for construction.
In addition, the Tianhuashan Tunnel to the west is 15At 989 km, it is the longest tunnel among the many tunnelsThis part of the tunnel is extremely difficult in the process of construction, because of the high altitude and thick mountains, and the construction difficulty has reached the first-class high-risk category.
Due to the short distance between the tunnels, for the sake of safety during driving, to prevent the production of life congestion effect when the train passes at high speedIn many of the tunnels, the construction crew has reinforced the concrete protective layerKeep the train passing safely.
There is data showing thatThe total number of construction personnel involved in the construction of the Xicheng high-speed railway exceeded 80,000This number is more than the number of people used to build the Hong Kong-Zhuhai-Macao Bridge, which shows how difficult it is to build.
The completion of the Xicheng high-speed railway has once again made the world's attention lock on China. In addition to overcoming the difficulties in the terrain,In terms of ecological protection, the Xicheng high-speed railway also gave a perfect answer.
The Xicheng high-speed railway line passes through the Crested Ibis National Nature Reserve in Yangxian County, Shaanxi Province, in order to protect the crested ibisThe Xicheng high-speed railway has installed a total length of 33,014 meters of crested ibis protection nets on both sides of the reserve.
In addition, at the beginning of the design of the Xicheng high-speed railway, nature reserves and water source protection areas were avoided to the greatest extent in terms of route selection. It's really impossible to avoid timeTunnels will be used to penetrate underground from 800 to 1,000 meters deepThe concept of green ecology runs through from beginning to end.
The successful construction of the Xicheng high-speed railway has realized people's dream of "returning thousands of miles of Shu Road in one day", crossing the Qinling Mountains in three hoursIn the morning, visit the Terracotta Warriors and Horses in Shaanxi, and in the afternoon, you can return to Chengdu to watch the rolling and eating bamboo.
In addition to facilitating people's travel, the Xicheng high-speed railway has also driven the development of the economy along the line. The Xicheng high-speed railway passes through Deyang, a heavy industrial city in Sichuan, Mianyang, the second largest city in Sichuan Province, and Guangyuan, a transportation hub in Sichuan Province.
In the Shaanxi region, passing through Hanzhong City, the largest city in the south of Shaanxi Province, the cities along the route have a high population density, and the convenient transportation lines undoubtedly give people more choicesThe active population has accelerated the circulation of the local population, and at the same time, it has also led to the development of tourism, which has benefited the local economy.
Not only that, the successful construction of the Xicheng Railway has also made Xi'an, Chengdu and Chongqing form a three-hour economic circleThe idea of the Western Triangle has gone from concept to reality.
The Xicheng high-speed railway is part of the Beijing-Kunming corridor in the national "eight vertical and eight horizontal" high-speed railway network planningIts successful opening has successfully pushed China's high-speed rail network to the west and upgraded the development pattern of high-speed rail in the west.
In addition to having a far-reaching impact on the economy, the completion of the Xicheng high-speed railway is of more milestone significance in terms of road transportation. The terrain in the southwest of China is rugged and dangerous, and the transportation lines are fewer than those in other regions, and the opening of the high-speed railway in the west has improved the transportation network in the southwest regionIt has alleviated the transportation pressure in Sichuan and Chongqing, and significantly improved the tension of transportation capacity in Sichuan and Chongqing.
Two thousand years ago, Prime Minister Zhuge came out of Qishan's dream of six times, and two thousand years later, people used modern science and technology to realize it. The high-speed railway in the west broke through the Qinling barrier and closely linked Guanzhong and Sichuan and Chongqing. The high-speed railway in the west has broken time and space, allowing the hearts of historical figures and modern people to be invisibly pasted together.