Guanjingkou Reservoir Water Transfer Tunnel
China, Chongqing
2017 – today

Chongqing is one of the largest cities in China. However, the water supply structure often reaches its limit. In order to sustain the main urban area the city decided to build the new Guanjingkou reservoir.

Along the alignment, two Herrenknecht AVN machines will drive 18 km of tunnels. With a length of up to 5,660m and overburdens of up to 325m, tunnelling is only feasible with a special machine design.

Both machines will advance towards each other: after they reach the final position, the shield will be dismantled inside the tunnel and the main machine will be relocated back to the launch shaft – ready for the next mission and saving several reception shafts.

Data Sheet

Country, Location

China, Chongqing


2017 – today




Heterogeneous ground:
Sandstone, mudstone, partly with conglomerate, shale and limestone

Tunnelling length

18,000 m

Machine Data

2x AVN2000AH:
Diameter: 2,650mm
Torque: 250kNm
Lining method: Pipe jacking

Your contact person Contact us

Steffen Dubé President and General Manager Herrenknecht Tunnelling Systems USA Inc.
Gerhard Goisser Commercial Manager Herrenknecht Tunnelling Systems USA, Inc.