ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2016, Vol. 36 ›› Issue (3): 355-372.DOI: 10.3973/j.issn.1672-741X.2016.03.018
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CHEN Shaohua
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Abstract:
Guanjiao Tunnel on XiningGolmud 2nd Line of QinghaiTibet Railway is the first railway tunnel in China whose length is larger than 30 km. In this paper, studies and results are as follows: 1) The technologies, such as ventilation gallery separated by inclined shaft, mucking by belt conveyor and increasing the air supply, are used, so as to reduce the environmental pollution, improve the construction efficiency and solve oxygen supply problem. 2) The comprehensive grouting for karstic fissurewater and rational drainage arrangement are used so as to solve the continuous highpressure water inrush problem. 3) Technologies, such as structure type adjustment, primary support strengthening and deformation allowance setting, are used, so as to control the large deformation of fault. 4) The “piston air” is used, the smoke distribution laws in tunnel when fire disaster happens is studied; and the jet ventilation fan and disperse ventilation by vertical shaft are used. The results can provide guidance for construction of extremelylong tunnel of similar projects in the future.
Key words: QinghaiTibet Railway, Guanjiao Tunnel, high altitudes, karstic fissure water, inclined shaft, ventilation gallery, intermediate separating plate, belt conveyor, mucking, operation ventilation, evacuation and rescue
CLC Number:
U 455
CHEN Shaohua. Key Construction Technologies for Guanjiao Tunnel on XiningGolmud 2nd Line of QinghaiTibet Railway[J]. Tunnel Construction, 2016, 36(3): 355-372.
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http://www.suidaojs.com/EN/Y2016/V36/I3/355