The world's largest high -speed rail tunnel enters the main construction stage

On September 23, the No. 2 oblique well of the Yuliang Tunnel of the Chongqing -Kunming High -speed Railway entered the tunnel's positive cave construction, marking that the world's longest high -speed rail tunnel entered the main construction stage.

The Yiliang Tunnel is located in Yanjin County and Yiliang County, Zhaotong City, Yunnan Province. It is located in the Wumeng Mountains, high mountains and deep, and the maximum burial depth is about 920 meters. Rock large deformation, high ground temperature, gas and other tunnel construction is poorly constructed. According to reports, the tunnel is the control project of the Chongqing high -speed railway. It is the world's longest high -speed rail tunnel with a speed of 350 kilometers per hour. 24.8 kilometers.

"We adopt the '2 horizontal hole+2 diagonal well+2 flat guide' auxiliary tunnel scheme during the tunnel construction. Create 7.5 kilometers. Construction workers overcome many adverse effects such as complex geological structure, large terrain undulating, and sensitivity of regional environmental environment. The "multi -point flowering" method is used. On average, more than 30 machines and equipment are constructed at the same time per day. With 13 turning roads, it guarantees that the No. 2 diagonal well enters the main hole as scheduled. "The person in charge of the project site construction said.

Faced with the complex construction problems and tension requirements of the Yiliang Tunnel, the Beijing -Kunming Expressway Xikun Co., Ltd. led the participating units to use the whole construction of the tunnel to be mechanized and efficiently built into a suit technology to ensure construction quality and construction safety. At the same time, the No. 2 diagonal well implemented a light -faced blasting process, and promptly publicized the dynamic publicity of new risks, and further accelerated the excavation speed.

The Chongqing high -speed rail is an important part of the "Beijing -Kunming Channel" one of the main channels of the "Eight Eights and Eight Heng" high -speed railway in China. Southern Station, 699 kilometers in length, planned a total of 21 stations, and the target value of passenger trains is 350 kilometers per hour. After the completion of the Chongqing high -speed rail, it will further improve the national comprehensive three -dimensional transportation network, strengthen the connection between the Shuangcheng Economic Circle and the urban agglomeration of central Yunnan in Chengdu, and greatly reduce the railway travel time from Chengdu and Chongqing to Kunming, which greatly improves The traffic conditions along the line will promote the high -quality development of the economy and society along the route.

Chengdu Daily Jinguan Journalist Tian Chengchen Editor He Qixie Editor Liu Yonghao map according to the railway department

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