General situation of sichuan-tibet railway line

The total length of sichuan-tibet railway is 1629 km, including about 650 km in Sichuan. The planned sichuan-tibet railway will be built along the Sichuan-Tibet Highway (south line) and connected with Dage Railway at Mangkang or Zuogong. After the completion, the train from Chengdu to Lhasa was shortened to more than ten hours. It is one of the five railways in the "Heavenly Road", that is, the "route into Tibet", and it also belongs to the Tibet railway network.

According to the national railway vision plan, sichuan-tibet railway starts from Chengdu, Sichuan, and will continue westward after leaving Chaoyang Lake, passing Pujiang, Ya 'an, Kangding, Litang and Batang, crossing Jinsha River, entering Tibet Zuogong and connecting with Yunnan-Tibet Railway (southern section of Dage Railway), and extending to Lhasa, the capital of Tibet, through Basu, Ranwu, Bomi, Linzhi, Milin, Langxian and Gongga. It will form an important east-west passage connecting Sichuan-Chongqing tourism ring road with Tibet and even southwest China.

It includes three sections: Cheng Kang Railway (Chengdu-Kangding), Lin Kang Railway (Kangding-Linzhi) and Lalin Railway (Lhasa-Linzhi). In sichuan-tibet railway, there are two stations 12 along the Chengdu-Pucheng Intercity Railway Passenger Dedicated Line, namely, Chengdu West, Shuangliu North, Wenjiang, Ma Yang, Chongzhou, Longxing, Dayi, Wang Si Town, Qionglai, Xilai, Pujiang and Chaoyang Lake. The design speed target value is 200 km/h.

Sichuan-tibet railway, the section from Chengdu to Kangding (xinduqiao) leads from Chengdu Hub and passes through Pengshan, Pujiang, Chaoyang Lake, Mingshan, Ya 'an, Tianquan and Luding to Kangding (xinduqiao) in the west. The construction length of the whole line is 325 kilometers, and it is designed according to the standard of double line 160 kilometers/hour.

In central sichuan-tibet railway, stations such as Gongga, Zhanang, Zedang, Sangri, Jiacha, Langxian, Milin, Chaoyang and Linzhi will be built in the section from Lhasa to Linzhi. Sichuan-Tibet highway is generally used as the transportation passage determined by the comprehensive transportation hub planning in western Sichuan, and there is no railway in the westbound passage. There is a highway from Chengdu to Lhasa, namely National Highway 3 18, which takes about 3 days from Chengdu to Lhasa. In terms of railways, there is only one tourist train T22 from Chengdu to Lhasa, with a total length of more than 3,300 kilometers. The train starts from Chengdu, bypasses Baocheng Line, turns to Lanzhou to the west, passes through Xining, Delingha, Golmud and Naqu, and arrives in Lhasa. It takes nearly 45 hours unilaterally. Due to the long running line and other reasons, this tourist train leaves every other day and the tickets are very tight. Therefore, it is very important to implement the construction of sichuan-tibet railway as soon as possible.

However, in those years, sichuan-tibet railway was put on hold because of its difficult construction and high investment. With the economic development and national defense construction in Tibet, it is urgent to speed up the construction of sichuan-tibet railway. Considering the existing economic and technical conditions in China, we should first ensure the construction and operation of the Qinghai-Tibet Railway. Therefore, when conditions are ripe, sichuan-tibet railway will start immediately. As for the new Tibet and Gansu-Tibet lines, they should be demonstrated first, then surveyed and finally implemented step by step. Thanks to technological innovation, sichuan-tibet railway will speed up to 200 km/h, that is to say, after the completion of sichuan-tibet railway, it will only take 8 hours from Chengdu to Lhasa in the future.

According to the planning scheme, the total length of the sichuan-tibet railway line was originally planned to be 1845 km, including 630 km in Sichuan, and the total investment budget of the whole line was 104 billion yuan. According to the requirements of railway construction examination and approval, the section from Chengdu to Kangding (xinduqiao) in sichuan-tibet railway is constructed by sections. After the completion of the Chengdu-Kangding section in sichuan-tibet railway, the time from Chengdu to Kangding was shortened to 1 hour. It is an important part of Chengdu-Lhasa railway and Tibet railway network. The construction of sichuan-tibet railway is also the need to develop tourism resources along the route and promote the development of Shangri-La eco-tourism zone.

Shangri-La Eco-tourism Zone covers 82 counties (districts) in 9 prefectures (cities) in southwest Sichuan, northwest Yunnan and southeast Tibet, among which Ganzi Prefecture in Sichuan and Changdu region in Tibet are the core areas of priority development, both of which are located along the sichuan-tibet railway, with unique tourism resources. Scattered Tibetan and Qiang cultural and Buddhist cultural tourism resources, such as Tusi Guanzhai and Dukaruo site in Zhuokechang, Marcand, with a history of more than 4,000 years, are seamlessly integrated with natural ecological landscapes such as snow-capped mountains and grasslands. For a long time, limited by traffic conditions, tourism resources along the route have not been developed on a large scale, and tourism reception capacity is insufficient. It is necessary to build sichuan-tibet railway as soon as possible to develop tourism resources along the route and promote the development of Shangri-La eco-tourism zone. In addition, the construction of sichuan-tibet railway will also open the land economic and trade channel between China and South Asia. Yadong and Nyalam ports in Tibet are two important land ports from China to India and Nepal in South Asia, and the exit passage from Lhasa to Yadong and Nyalam ports has also been included in the long-term road network planning of China.

The construction of sichuan-tibet railway is the need to promote the opening-up of Sichuan and Tibet, and the need to build a land-based economic and trade channel from China to South Asia. The exit passage from Lhasa, Tibet to Yadong and Nyalam ports has been included in the long-term road network planning of China. With the completion of sichuan-tibet railway, it is expected that the land passage from central, eastern and southern China to South Asia will be formed in the future, which will greatly promote the opening up of Sichuan and Tibet and promote the construction of China-South Asia land economic and trade passage. Tong Ruochun, deputy to the National People's Congress and deputy director of the Standing Committee of Chengdu Municipal People's Congress, once pointed out in the Proposal on Building sichuan-tibet railway as soon as possible. The construction of sichuan-tibet railway will effectively increase Sichuan's radiation-driven role in Tibet's development.

Li Changping, governor of Ganzi Prefecture, put forward at the 20 12 National "Two Sessions": "There are no railways in the vast areas of western Sichuan, and the transportation of goods and people mainly depends on roads. Sichuan-Tibet Highway has been built for more than 50 years, with low grade, many geological disasters and poor road conditions, which really cannot meet the needs of economic and social development. There may be some disputes about the railway investment in sichuan-tibet railway at the national level, but once sichuan-tibet railway is completed, the economic benefits will be enormous.

Shi Qun, an expert from the Economic Planning and Research Institute of the Ministry of Railways, said that the average passenger dedicated line needs to invest 1 100 million yuan per kilometer, and the freight dedicated line also needs about 80 million yuan. At the end of 20 14, the national railway mileage was 80,000 kilometers. If1.6000 km is built by 2020 and 80000 km is added, and1.6000 km will be built every year according to local suggestions, raising funds will be a big problem. 20 15-08- 12 "survey and design in sichuan-tibet railway: the birth of the world's most difficult giant roller coaster" reported that on August 6th, 52-year-old Lin, the deputy chief engineer in charge of survey and design in sichuan-tibet railway, talked about the past and was filled with emotion.

Lin Jinshi said: "The design of the whole sichuan-tibet railway is the most difficult project I have ever encountered." "sichuan-tibet railway's data is so hard-won, it is all exchanged with our will to challenge the limit!"

Once in Qamdo, Tibet, the motorcade bumped until midnight to reach the station. Looking at the engineers who came back from the survey site covered in mud, the local government staff said, "Now you have entered the deep mountains and forests that even our locals dare not enter, and even the yaks are unwilling to go." Lin smiled and said, "Where we have never been, how can we safely let the train go there?" This is how we go deep into the mountains to ensure the safety and quality of sichuan-tibet railway-

Initially, there were three schemes for xinduqiao to reach Jiangda: Ganzi, Xinlong and Litang. Some people in the industry tend to adopt the Ganzi scheme with wider terrain. However, through the field investigation led by Lin, it is found that Ganzi scheme is 280 kilometers away along the world-famous Xianshuihe fault and Ganzi-Yushu fault. There are 26 recorded earthquakes of magnitude 6 or above in this area, and a major earthquake will occur in about 30 years, and it is still squeezing and moving at the speed of 4- 12 mm every year. Therefore, the Second Institute of China Railway and the Institute of Geology of the State Seismological Bureau jointly conducted in-depth special research, and finally the Litang scheme was adopted for the line.

In the design of Sangri-Gacha section, the route was originally along the Yarlung Zangbo River, which is an unobjectionable conservative design. "I really don't know if I don't know. I was shocked at first sight! " Lin said that dangerous rocks and falling rocks are serious on both sides of the river, and the engineering geological conditions are extremely poor; In the canyon with a height difference of more than 3000 meters, even if a stone as big as an egg rolls down and hits the train, the consequences are unimaginable. He immediately decided to study the plan again. The southern route plan will pass through Pujiang, Mingshan, Yucheng, tianquan county, Luding, kangding city, Yajiang, Litang, Batang, Mangkang, Zuogong, basu county, bomi county, Linzhi, Milin, Langxian, Jiacha, Qusong, Sangri, Naidong, Zhanang and Gongga. There are only eleven counties and cities in Lixian, Marcand, Luhuo, Ganzi, dege county, Jiangda, Karuo, Dingqing, Baqing, Suoxian and Naqu on the northern line, and only eighteen counties and cities turn to the southern line after crossing Qamdo, with a long route. Therefore, the southern line plan is the final choice, and a railway will be built in the future, which will pass through Wenchuan County and Barkam City of Aba Prefecture in the northern line plan.

South line scheme:

This line leads from Chengdu Hub, passes through Shuangliu/Pujiang, this section, Chengya Intercity Railway * * *, southwest to Ya 'an, passes through Ya 'an, and passes through Erlang Mountain to Luding, Kangding, Litang, Zuogong, Bomi and Linzhi to Lhasa.

Northern line scheme:

The line is along National Highway 3 17, and Chengdu-Marcand-Ganzi-Changdu-Bomi-Linzhi-Lhasa. Lin, deputy chief engineer of China Railway Second Hospital, introduced at the presentation activity of sichuan-tibet railway Survey and Design Deeds Report Group held in October1May/August that the cumulative climbing height of sichuan-tibet railway line was over14000m, which was equivalent to building a "giant roller coaster" with the highest technical difficulty in the world among the most dangerous and complicated mountain canyons. Builders will face six major problems, such as high-intensity earthquake and geological fracture, high geostress, high geothermal energy, high-density pebble bed, high geological disaster and difficulty in oxygen supply in tunnels.

The geological conditions along the sichuan-tibet railway are complex, with serious geological disasters such as frozen soil, cold and hypoxia, collapse, strewn at random, landslide, high earthquake zone, geothermal and rockburst. In those years, compared with the Qinghai-Tibet, Sichuan-Tibet and Gansu-Tibet lines, sichuan-tibet railway was temporarily put on hold because of its great construction difficulty and high investment.

Based on the price level of1at the end of 1995, the investment in the Qinghai-Tibet line in the original plan was139.2 billion yuan, and the investment in the Sichuan-Tibet line was 76.79 billion yuan, several times different. From the engineering geological conditions, the Qinghai-Tibet Railway is mainly a frozen soil problem, and there are no avalanches, deserts and swamps. And most of the areas it passes through are flat and easy to construct. Besides frozen soil, there are many complicated geological conditions in sichuan-tibet railway, such as avalanches, strewn at random, landslides, high earthquake areas, geothermal, karst caves, underground rivers and rockbursts. The design service life of sichuan-tibet railway is 100 year.

"The Qinghai-Tibet line rises on a gentle slope, while the Sichuan-Tibet line is stepped. "Zhao, a railway construction risk expert and vice president of Zhonghui International Insurance Brokerage Co., Ltd., said that the planned sichuan-tibet railway needs to cross three steps: Sichuan Basin, Yunnan-Guizhou Plateau and Qinghai-Tibet Plateau, as well as the Minjiang River, Jinsha River, Yarlung Zangbo River and other major rivers along the way, as well as snow-capped mountains such as Sheshan, Queer Mountain and Nyainqentanglha Mountain. According to the data of bridges and tunnels, the total length of bridges and tunnels of Qinghai-Tibet Railway is 30.6 kilometers, of which the longest tunnel is 1.2 1 km, and the total length of bridges and tunnels only accounts for 2.8% of the total length of the line. The total length of bridges and tunnels on the Sichuan-Tibet line is 8 19.24 km, of which the longest tunnel, Nyainqentanglha Mountain Tunnel, is 19.5 km, accounting for 42.5% of the total length of the line.

The "two tunnels and one bridge" from sichuan-tibet railway to Linzhi refers to Sangzhuling Tunnel and Bayu Tunnel, as well as Bayu Yarlung Zangbo River Third Line Bridge. This area belongs to the southern Tibet valley between Gangdise Mountain, Nyainqentanglha Mountain and Himalaya Mountain, with dangerous terrain and extremely difficult construction. Although it is only a single line, the total length of the 403-kilometer line is 35.98 billion yuan, and the investment per kilometer is 85 million yuan, which is close to the standard of high-speed rail construction per kilometer/kloc-0.00 billion yuan in the plain area. Cheng Kang Railway is Chengdu-Kangding (xinduqiao). The construction length of the whole line is 325 kilometers, and it is designed according to the standard of double line 160 kilometers/hour. From Chengdu to Kangding, it is a railway that mainly focuses on intercity passenger flow and takes into account cross-line passenger and cargo transportation, in which Chengdu to Pujiang section takes into account intercity functions.

Chengdu-Chaoyang Lake section:

The section from Chengdu to Chaoyang Lake in sichuan-tibet railway is divided into two lines, and the passenger dedicated line is built as a double-line I-class electrified railway with a design speed of 200 kilometers per hour; The line starts from Chengdu West Railway Station and passes through Wenjiang, Chongzhou, Dayi, Qionglai and Pujiang to Chaoyang Lake. The freight line leads from Chengdu hub and meets at Chaoyang Lake Station via Pengshan and Pujiang to the west. After leaving Chaoyang Lake, sichuan-tibet railway will continue westward, passing through Ya 'an, Kangding, Litang, Zuogong, Bomi and Linzhi to Lhasa.

Chengdu-Chaoyang Lake section in sichuan-tibet railway and Chengdu-Pujiang (Chaoyang Lake) intercity railway passenger dedicated line together constitute the passenger and freight function of Chengdu-Chaoyang Lake section in sichuan-tibet railway. 24 extra-large bridges and large and medium-sized bridges will be built on the main line of Chengpu intercity railway, with a total length of 64.445438+0 km, accounting for 65% of the length of the main line. Among them, the railway leads from Chengdu West Railway Station, which is a viaduct and leads directly to Dayi through a bridge, with a length of more than 50 kilometers, which is the longest bridge in the whole line.

Chaoyang Lake to Ya 'an Section:

The section from Chaoyang Lake to Ya 'an in sichuan-tibet railway is 42km long. It is built by a double-track first-class electrified railway with a design speed of160km/h. It is an important part of sichuan-tibet railway, starting from Chaoyang Lake and passing through the famous mountains to Ya 'an.

Ya 'an-Kangding section:

The design speed is per hour160km.

Progress:

On August 30th, 2009, the environmental impact report of Chengdu-Chaoyanghu section in sichuan-tibet railway was officially released. This is the first time that sichuan-tibet railway's design details have been published.

20 12 Sichuan-Tibet highway from Ya 'an to Lhasa was approved (overhauled), but it has not started yet.

At the end of 20 12, the pre-feasibility study is under way on the Chengdu-Kangding section of sichuan-tibet railway with a total length of 266 kilometers and a total investment of 31400 million yuan, and the construction is expected to start in 20 13. The target speed of the railway is above 200 km/h, and it takes only 1 h to travel from Chengdu to Kangding after completion.

20 12,12 The news came from the Sichuan Development and Reform Work Conference held on February 30th that the Chengdu-Kangding (xinduqiao) section in sichuan-tibet railway was approved by the National Development and Reform Commission, and the construction is about to start.

In 20 13, a number of major projects, including the Chengdu-Kangding (xinduqiao) section in sichuan-tibet railway, were approved by the National Development and Reform Commission, and construction is about to start.

August 20 13, Chengdu-Pujiang intercity railway passenger dedicated line officially started, with a construction period of three years. It is expected to be completed in 20 16.

2065438+August 3, 2003 65438+2065438 Chengdu-Pucheng Intercity Railway Passenger Dedicated Line completed the bidding for the construction unit, and the whole line was undertaken by China Railway Second Bureau, Eighth Bureau and Twelfth Bureau, with a planned construction period of 28 months.

2013 on August 26th, the construction unit of Chengdu-Pudong intercity railway passenger dedicated line has entered the site, and it is expected to be completed and opened to traffic by the end of 20 15.

In 20 14, sichuan-tibet railway will start construction, with an estimated construction period of at least 8 years, which will be the preferred route for Sichuan to enter Tibet in the future. Lalin Railway is Lhasa-Linzhi. The third railway in Xizang Autonomous Region, sichuan-tibet railway and Yunnan-Tibet Railway, are important components. The newly-built main line is 435 kilometers long and designed according to the speed of double lines 160 kilometers.

20 14 Lhasa-Linzhi section will also start construction with a design speed of 200 kilometers per hour. During the investigation, Lausanne Jankan, Chairman of Xizang Autonomous Region, stressed that the next step should be to go all out to promote the construction of Lalin Railway (Lhasa-Linzhi) to ensure that the control project of "two tunnels and one bridge" will be officially started in mid-February 20 14 and will be fully started in the first half of 20 14.

20 14 10 3 1, the section from Lhasa to Linzhi in sichuan-tibet railway was approved by the National Development and Reform Commission, and the 32-kilometer section from Lhasa to Xie Rong of the La-Ri Railway was electrified simultaneously. The total investment of the project is 36.6 billion yuan, and the construction period is 7 years.

2014 65438+Construction started at the end of February. March 2015 side tunnel (auxiliary) project of sangzhuling tunnel entered the tunnel.

2065438+On June 28th, 2005, the Lalin Railway started construction in an all-round way. Lin Kang Railway runs from kangding city, Sichuan to Linzhi, Tibet.

The date of approval is temporarily unknown. After the completion of Lalin Railway, it will be started again. Construction is expected to start in 20021year.

The preliminary research work began on 20 16. The construction period of Lalin Railway is more than 6 years, and it is planned to be completed by the end of 2020. It will take more than six years to build a 403-kilometer-long Lalin Railway, so it will take more than 10 years to build a more difficult Lin Kang Railway, with a total length of about 65,438+0,000 kilometers. Therefore, it will take about eighteen years (from 2065,438+05 to 2032) for sichuan-tibet railway to be completed and opened to traffic.