Dewatering, waterproofing and drainage - Tunnel Engineering: Basics and Additional Services for Design and Construction - page 228

Figure 5-23 Laying ma-
chine for the waterproof-
ing of the Seelisberg road
tunnel.
When plastic membranes are used to waterproof against water under pressure, compart-
ment seals should be provided at every concrete block joint as ring bulkheads with con-
nection strips (Fig. 5-24 and Fig. 5-25) [193]. The connection strips should be welded
watertight to the loose-laid waterproofing membrane and to their welded seams.
Figure 5-24 Principle of
a compartment system
[193].
Figure 5-25 Bulkhead
sealing at a block joint
with single-layer wa-
terproofing membrane
[EAG-EDT].