Environmental Engineering Reference
In-Depth Information
Table 15.11.
Perimetric joint details and maximum observed displacements for modern concrete face rockfill dams.
Water stop details
Maximum displacement (mm)
Dam name
Bottom
Middle
Top
Opening
Settlement
Shear
Comments - timing
1
Comments - location
Aguamilpa
Copper
PVC
Flyash
25
18
5.5
Opening and settlement
Maximum opening &
measured to 7 yrs
settlement measured
after EOC. Shear
towards right abutment.
measured at
Max shear measured
2 yrs after EOC.
towards centre of dam.
Alto Anchicaya
None
Rubber
None
125
106
15
Measurements at less
Remediation included
than 8 yrs after EOC.
application of compacted
clay, sand-asphalt mix &
mastic to perimetral joint.
Bastyan
Stainless
Rubber
None
4.8
21.5
Unknown
Measured to
Details of water stop
steel
7.5 yrs after EOC.
not available.
Cethana
Copper
Rubber
None
12
Unknown
7.5
Measured approx
Maximum opening
12 yrs after EOC.
in centre of dam.
Maximum shear in left
abutment.
Chengbing
Copper
PVC
Mastic
13.1
28.2
20.6
Measurements at
Maximum movement on
1-2 yrs after EOC.
lower part of left abutment.
Crotty
Stainless
Hypalon
None
2
3.3
24
All readings
Max shear on left
steel
taken approx 2 yrs
abutment. Max opening
after first filling.
and settlement close to
centre of dam.
Foz Do Areia
Copper
PVC
Mastic
23
55
25
Timing unknown
Location of maximum
movements unknown.
Golillas
Copper
PVC
Mastic
100
36
Unknown
Measurements at
Location of maximum
less than 11 yrs after EOC.
movements unknown.
Guanmenshan
Copper
Rubber
Rubber
5.7
4.8
2.8
Measurements within
Location of maximum
asphalt
5 yrs of EOC.
movements unknown.
Ita
Copper
None
Mastic
Unknown
Unknown
Unknown
No data available.
No data available.
Khao Laem
Copper
Hypalon
Mastic
5
8
22
Measurements
Location of maximum
within 16 yrs of EOC.
movements unknown.
Kotmale
Unknown
Unknown
Unknown
2
20
5
No data on nature of
Location of maximum
water stops available.
movements unknown.
(
Continued
)
