Civil Engineering Reference
In-Depth Information
Table 5-15
Selection of a waterproofing system depending on the groundwater conditions [EAG-EDT].
No.
Water-
prooing
membra-
ne geo-
metry
Hydrosta-
tic pres-
sure head
above the
tunnel in-
vert in m
Chemical concrete
attack
1)
(exposure
class)
Required additional measures
weak, mo-
derate
(XA1, XA2)
2)
heavy
(XA3)
3)
Waterstops
Integ-
rated
grouting
system
4)
internal
external
1
without
(no standing
water per-
missible)
membrane
2 mm
5)
-
no
no
no
2
waterproof
concrete
WUB-KO
6)
-
present
depen-
ding on
system
no
no
umbrella
3
-
memb-
rane
2 mm
5)
no
no
no
membrane 3 mm
5)
4
up to ap-
prox. 30
no
yes
yes
5
waterproof
concrete WUB-
KO
6)
-
present
depen-
ding on
system
no
no
all-round
6
from approx.
30
to approx.
60
waterproof concrete
WUB-Komod
6)
+ membra-
ne 3 mm
no
yes
yes
two layers membrane
5)
(rock side 3 mm + air side
2 mm)
7
no
yes
yes
1)
Classification of concrete-aggressive environments according to DIN-Fachbericht Beton 100
2)
Corresponds to „weak“, „strong“ according to DIN 4030
3)
Corresponds to „very strong“ according to DIN 4030
4)
Normally to be provided under water pressures from 10 m head
- for single-layer membrane waterproofing, compartments between plastic membrane and inner
lining, groutable
- for two-layer plastic membranes, chamber element between the two layers, groutable
5)
Concrete specification requirements for the inner lining according to Ril 853 Modul 853.4004 or
ZTV-ING
6)
Waterproof concrete WUB-KO according to ZTV-ING corresponds to WUBK according to Ril 853,
concrete specification requirements for the inner lining according to Modul 853.4004 of Ril 853,
WUB-Ko
mod
see Section 2.3
7)
Under higher water pressures, special measures may have to be taken, which are to be specified for
eac
h project
5.3.2.4 Repair of waterproofing
This can denote a planned addition to the main waterproofing or repair works to leaks in a
tunnel. The most common repair measures undertaken in tunnel refurbishment are:
Search WWH ::
Custom Search