partial pressure joint arch tunnel

arch tunnel set

Continuous Arch Tunnel

Double Arch Tunnel

Dual - arch tunnel

Joining Arch Tunnel

Tunnel Arch

Twin-bore Connecting Arch Tunnel

Two Arch Tunnel

arch rib and arch tile

tied arch bridge with steel arch rib

diversion tunnel and spillway tunnel

option of separate highway tunnel and Metro tunnel

railway tunnel under crossing the highway tunnel

Shield Tunnel and Rock Tunnel

water tunnel and salt tunnel

G-D-P joint construction newmodel

’K’joint

11 joint