According to the official account of “China Railway”, at 10:00 on July 13, the Guizhou section of the Guiyang-Nanning high-speed railway (hereinafter referred to as the Guizhou section of the Guinan high-speed railway) successfully completed the Qingmiaozhai tunnel, which also marked the tunnel project of the Guizhou section of the Guinan high-speed railway. All through. The Guizhou section of the Guinan high-speed railway has a total length of about 199.6 kilometers and a design speed of 350 kilometers per hour. The preliminary section started on December 29, 2016, and the whole line started in February 2019. The bridge-tunnel ratio of the whole line reached 91%. The station and 3 stations in Longli, Guiding County and Duyun East were renovated and expanded. Video At present, the four electricity and station building projects behind the station have been started, and various projects are progressing in an orderly manner as planned. Qingmiao Village Tunnel is located in the junction of Longli County and Guiding County in Guizhou Province. The tunnel is a key control project of the Guizhou section of the Guizhou high-speed railway, with a total length of 8,340 meters. The tunnel body passes through 5 faults and 2 contact zones between soluble and insoluble rocks. The soluble rock section is about 1,150 meters long, with complex geology and extremely difficult construction. big. The railway department adhered to the principle of “leading management, short excavation, strong support, early closure, and frequent measurement”, and finally achieved the goal of safe and smooth penetration of the Qingmiao Village Tunnel. .
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