Key Technologies for Construction of Long and Complex Tunnels on Xi'an-Yan'an HSR
In view of the large number of tunnels,poor geological conditions,complex construction environment and other characteristics of the newly built Xi'an-Yan'an HSR,this paper studies the key technologies for construction of typical long and complex tunnels by means of theoretical analysis,laboratory test,on-site monitoring and measurement,numerical simulation and expert consultation,and forms relatively complete key technologies for construction of tunnels on Xi'an-Yan'an HSR,mainly including deformation control technology for shallow-buried soft plastic loess tunnels,rapid tunneling technology for full-face large-scale mechanized supporting facilities,special support technology for gently dipping layered surrounding rock tunnels,low vibration non-blasting tunneling technology and technical measures for mechanized operation space layout,which promotes the upgrading of mechanized,information-based and intelligent construction technology for weak surrounding rock tunnels,and provides important guarantee and support for the safe and smooth construction of Xi'an-Yan'an HSR.
Xi'an-Yan'an HSRlong and complex tunnelsoft plastic loesssurrounding rockshallow-buriedtunneling technology
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