The Design and Engineering for Additional Accessorial Tunnels While the Main Tunnel Is under Construction in Yuanliangshan Tunnel

Abstract:

In order to solve the water and sand inflows during the construction of Yuanliangshan Tunnel, as well as to speed up the construction of big stride of inlet station, 10 accessorial tunnels were creatively built. They are transverse, geological explore, roundabout and draining tunnels. The paper mainly introduces the design and construction of these accessorial ones.