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Supervision for the Guizhou Section of Shanghai-Kunming Passenger Dicated Line

The main line of this section is 99.638km, with the design speed of 350km/h. And the occupied percentage of bridges and tunnels is up to 92%, of which there are 62 bridges, 1station, subgrade with length of 8.136km, and 40 tunnels with total length of 65.482km, among them including 1 tunnel with risk level of grade I (total length of 7120m, single tube, excavation section of 151m2), 2 tunnels with risk level grade (Maupingshan tunnel and Shaping tunnel, total length of 7708m and 6584m respectively, single tube, excavation section of 151m2) and 6 gas tunnels. Under the geological condition of karst, most tunnels, bridges pass through karst rock, gas bearing zone and soft swelling soil layer, and the key points are related to countermeasures against karst, water and mud burst, gas burst and soft soil, which are very difficult to handle and have great construction risks.

Since August 24, 2010, the CRAC supervision department has taken standard management according to relative requirements, and conducted scientific research and innovation work. After five years of hard work, no accident of safety and quality occurred. It only takes 3 hours to go to Changsha from Guiyang after the project is finished and opened to traffic on June 16, 2015.

 The CRAC Supervision Department won the First Prize for Credit Evaluation given by Hukun Passenger Dedicated Line (Guizhou) Company in year 2012 and year 2013, the Pioneer Supervision Unit awarded by Guizhou Province in 2014. And the chief supervisor won the honor of Locomotive Medal and Excellent Supervisor. The research topic of “Study on kart water prevention and safe construction techniques for karst tunnels” undertaken by the CRAC supervision department associated with related construction units won the Prize of Science and Technology Achievement given by Hebei province in 2014, and another topic of “Application study on construction techniques of automatic control percussion drill” won the Third Prize of Scientific and Technological Progress Award given by Guizhou province.

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