Water intake tunnel of Jiaxing 2nd stage power plant
HEIGHT: 4.4 m
WIDTH: 8.1 m
TOTAL IMMERSED LENGTH: 140 m approximately for each line
DEPTH AT BOTTOM OF STRUCTURE: Maximum depth below sea level is 21 m
ENVIRONMENTAL CONDITIONS:
Maximum difference of tide elevation is up to 8 m. Seawater with heavy silt is also very adverse
for immersion work.
FABRICATION METHOD:
Tunnel elements and water intake caissons were fabricated in
casting basin at the same time at right hand of tunnel axial.
WIDTH: 8.1 m
TOTAL IMMERSED LENGTH: 140 m approximately for each line
DEPTH AT BOTTOM OF STRUCTURE: Maximum depth below sea level is 21 m
ENVIRONMENTAL CONDITIONS:
Maximum difference of tide elevation is up to 8 m. Seawater with heavy silt is also very adverse
for immersion work.
FABRICATION METHOD:
Tunnel elements and water intake caissons were fabricated in
casting basin at the same time at right hand of tunnel axial.
Shanghai,
China
Zhejiang Energy Resource Invest Company
Shanghai Tunnel Engineering Co. Ltd.
East China Institute of Power Plant Design and Research
23.4m
140m
21m
Project construction
2004-01-07
6
Two
4.4m
8.1m
The project locates in Hangzhou bay where sea condition is very sever for immerse project. The
foundation is rock strata. There are 2 large water intake caissons with diameter of 25 m and
height of 16.6 m also constructed with immersed method.
foundation is rock strata. There are 2 large water intake caissons with diameter of 25 m and
height of 16.6 m also constructed with immersed method.
Tunnel elements and water intake caissons were fabricated in
casting basin at the same time at right hand of tunnel axial.
casting basin at the same time at right hand of tunnel axial.
Survey tower installation; lay
out of anchors; foundation
trench dredge for
sedimentation; installation of
floating box.
out of anchors; foundation
trench dredge for
sedimentation; installation of
floating box.
Maximum difference of tide elevation is up to 8 m. Seawater with heavy silt is also very adverse
for immersion work.
for immersion work.
Catamaran barge
External: GINA rubber gasket;
Internal: Rigid joint by
reinforced concrete
Internal: Rigid joint by
reinforced concrete
Watertight concrete
Rubble (20-200 kg) with 2 m thickness
Grade of concrete: 30 MPa
Temporary condition: -1.34