At a recent work conference, China national railway corporation limited revealed that it will push forward the construction of a major railway project between sichuan and Tibet in 2020.

The meeting called for deepening the feasibility study, application and approval of the sichuan-tibet railway and relevant cooperation, optimizing the organizational plan for the construction of the pre-construction section, promoting the preliminary design and construction drawing design in an orderly manner, coordinating relevant units and local governments to speed up the construction of supporting facilities, and fully implementing the conditions for starting construction in accordance with the law.

At the same time, we will push forward the implementation plan for major scientific and technological breakthroughs on the sichuan-tibet railway, strengthen the construction of a national technological innovation center for the sichuan-tibet railway, compile special technical and management standards for the sichuan-tibet railway, and make new breakthroughs in major scientific and technological breakthroughs on the sichuan-tibet railway.

In 2019, the state railway group will promote the planning and construction of sichuan-tibet railway as the annual key work, according to the ldquo; Scientific planning, technical support, ecological protection, safety and reliability ” The overall requirements of the whole industry to quickly carry out the work.

In the past year, China railway group has initially established the sichuan-tibet railway. 5 + + 16 + 3 & 54 throughout; System and standard system; drafted and formulated five management systems, including the management measures for construction of sichuan-tibet railway; compiled and completed nine categories of sichuan-tibet railway similar projects and 54 technical summary reports; formulated and completed 16 construction standards and ldquo; Two tunneling and one bridge ” The atlas of design and construction technical scheme, key technical problems and countermeasures provides the system guarantee and technical support for promoting the planning and construction of sichuan-tibet railway with high starting point, high standard and high quality.

Sichuan-tibet railway connect chengdu in sichuan province and Tibet Lhasa, is the second after the qinghai-tibet railway to Tibet railway artery (and subsequent yunnan Tibet railroad), about 1580 km, the project total investment 270 billion yuan, considering spreads reserve funds after all estimation total investment is 304.5 billion yuan, after the open to traffic across the board from chengdu to Lhasa railway transit time will be from 36 hours to 12 hours or so.

The sichuan-tibet railway is a national railway grade I double-line electrification specification, with a design speed of 200km per hour and a proper reduction in local sections according to the actual situation. The minimum curve radius is generally 3500m, difficulty 2800m and limited slope 30&permil. , the effective length of the arrival and departure line is 650 meters, and the traction mass of the universal speed truck is 2,100 tons.

The sichuan-tibet railway is divided into four sections, of which the chengdu-ya 'an section has been put into operation since December 28, 2018, and the lassa-nyingchi section is being smoothly put into operation. Only the most difficult section, ya an-nyingchi, has not been started yet.

To nyingchi in Lhasa section of 1008 km, after the sichuan basin, western sichuan mountain valley area, along the southeast region of western sichuan Gao Shanyuan area, Tibet, southern Tibet valley area five geomorphic units, such as topography and geology are extremely complex, environment is very vulnerable, foundation is very weak, particularly difficult engineering construction, to say never in the history of mankind have so difficult super railway engineering.

Across the tunnel line proportion is as high as 84%, total length of 843 kilometers, more than the high-speed rail from Beijing to zhengzhou total mileage, of which more than 30 km long tunnel have six, but wu - TongMai Yi Gong tunnel is achieved astonishing 54 kilometers, and at present, China's longest railway tunnel of 32 kilometers, at the same time, the cumulative altitude of more than 16000 square meters, equivalent to two mount Everest.

Bridges will also be spectacular, including the dadu river suspension bridge, which will span more than 1,000 meters, making it the longest single-span railway bridge in China. It is said that the bridge is the station, while the nujiang bridge will be 700 meters away from the bottom of the nujiang river, 70 meters higher than the top of the Shanghai tower.

According to the tender document released at the end of 2018, the construction period of the sichuan-tibet railway from ya 'an to nyingchi will be 10 years.