Following the successful 2018 Annual meeting, on February 2, 2018, Sichuan Province Wood building society also organized the Chengdu construction project by China Railway 15th Bureau GroupCo., Ltd. completed the "High altitude complex environment Long tunnel construction technology Research" Results appraisal meeting。 

    China Railway 15th Bureau Group Co., LTD., the main technical personnel of the research resultsThe research results were reported。The research institute relies on the Xueshanliang tunnel project of Chuanhuang Highway Located in Songpan County, Aba Prefecture, Sichuan Province, it is located in the Minshan Mountain range of the Sichuan-Tibet Plateau At an altitude of 3500m, the main tunnel is 7,966 m in length and 8,086 m in horizontal direction。Is Aba Prefecture "eleven Five "key construction projects are listed at the same time 为“5.12 "post-earthquake reconstruction project。 It is a typical plateau climate with high cold deficiencyOxygen, low air pressure, strong ultraviolet radiation, climate change;Located in dense forest High fire protection rating;Located in the 5A core scenic spot, high environmental protection requirements;Tunnel crossing The more the tourism trunk line, the traffic pressure is large;The entrance to the cave is an ancient landslide loose accumulation body, partial Severe pressure;The cave entering section crosses the "Z" shaped tourist trunk line, and the risk of entering the cave is great Work characteristics and difficulties。

    Seven experts from related industries The family formed an appraisal committee。鉴定 The committee is being briefed and reviewedOn the basis of the data, by sufficient quality Inquiries and discussions were carried out on the resultsObjective and impartial evaluation and identification。 

    We speak freely, for high cold, high altitude, low oxygen, long distance, health Tunnel construction site in fragile and sensitive area, loose accumulation layer and fracture zone after earthquake Study the formation of antifreeze insulation, ventilation oxygen supply, dust removal, micro-disturbance and green environmental protection Key construction technologies such as construction were approved by the experts at the meeting。