China's longest railway tunnel under construction in Western Qinling tunnel | West Qinling tunnel on Lanzhou-Chongqing railway _ news

Xinhuanet, Lanzhou, July 19 (reporters Qi Zhongxi and Fan Xi)-after six years of construction, longest railway tunnel under construction in China--West Qinling tunnel on Lanzhou-Chongqing railway, 19th all through. As the control project of the Lanzhou-Chongqing railway, West Qinling tunnel linking Lanzhou-Chongqing railway has laid a solid foundation.

China railway to build 18 group three company in West Qinling tunnel project manager Liu Jinliang introduction, West Qinling super-long tunnel of 28.2 kilometers in length, is the Lan-Yu railway control engineering. Tunneling with a TBM (full face rock tunnel boring machine) and drill and blast method of construction, is a method of combining the two longest railway tunnel driving mileage.

CRC 18 group company using 180 meters long, weighing 1800 tonnes, the world's most advanced TBM TBM excavation diameter up to 10.23 meters, surpassing the height of three storeys. This is the currently the largest TBM construction section, the longest railway tunnel in driving distance.

"This drill and blast method combining with TBM construction can not only ensure the construction quality, progress, while ensuring the safety, but also to minimize pollution of ecological environment construction and impact, and improve the working environment. It marked in the special geological conditions, the railway tunnel construction technology has reached the world advanced level. "Lan-Yu railway CRC 18 Council Deputy Director Su Rui said.

In West Qinling tunnel up 6 years of construction process in the, China iron built 18 Council group relies on technology innovation, has security through specialist tunnel broken with, and secondary big fault, and high stress section and special hard rock section, conquer 20 km alone head ventilation, technology problem, created has Supreme months dig into 727.7 meters of domestic similar tunnel construction Supreme records, and made more than 10 more items achievements and national patent.

820 km long Lanzhou-Chongqing railway is an important railway line connecting China's Northwest and Southwest, Chongqing via Alataw pass in Xinjiang, connecting Datong road international logistics in Europe-the "Yu Xin Europe" an important part of the railway, built after the opening of Chongqing to Lanzhou, the journey time will be reduced from 21 hours now to about 10 hours.

(Edit: SN098)
14:55 on July 19, 2014 Xinhua NET