e-mosty September 2018 Vessels and Equipment Used for Bridge Construction | Page 59

Wet Dock Caisson Construction
STFA self-performed all marine works for the wet dock
caisson construction operations. Personnel, concrete
mixers, concrete pumps, reinforcement, shuttering,
cranes, boom trucks, fork-lifts, and all other equipment
necessary for construction and marine operations, were
transported by STFA’s own fleet including the 16 owned
and 12 Operated Marine Vessels listed below. In order to control and operate this diverse fleet, STFA
Set-up their own marine construction team consisting of
54 marine construction specialists and 136 sea farers
(excluding the persons of the operated vessels) at the
pick point, in addition to the caisson construction and
supervision team and caisson subcontractor at the dry
dock.
Heavy Floating Crane: 1 Owned (Koca Yusuf-II), Steel Shaft Installations at Wet Dock
1 Operated (Taklift-VII) The final stage of tower caisson foundation construction
was to install the two steel shafts on each caisson in the
wet dock.
Floating Crane:
2 Owned (Galata, Kazıkçı İbrahim),
3 Operated (Milas, Alkor Barge and Doğa-I)
AHT Tug Boat:
Reinforcing bar installation and top slab concreting works
were completed before the steel shafts were installed.
1 Owned (Yaşar Doğu-I),
1 Operated (Kurtarma-10)
Multi-Cat:
1 Owned (Kemal Ersoy)
Tug Boat:
5 Owned (Kocabaş-I, Ercan Tusun,
Kuşadası-D, Servet Karadağ and Fikret Özkütük)
Work Boat:
2 Owned (Diana-II and T.Kazık.2)
Service Barge:
2 Owned (Kemal Kurdaş, Sezai Efe),
3 Operated (Perla, Başaran-28 and Şahmerdan)
Service Boat:
2 Owned (Yazgan, Yücel Çakır),
The steel shafts were installed on the caissons using the
1200 t capacity Taklift 7 heavy floating crane (sheerleg).
Installation tolerances required by the design (+/- 20mm
lateral and 1/300 vertical) were achieved during
installation. Guide plates and jacks were used to align
and adjust the steel shafts during manufacturing and
installation.
Steel shafts were transported by heavy floating crane
(Taklift 7 of SMIT/Boskalis).
3 Operated (Yıldıran, Hakan-53 & Boğaz Botu)
Figure 20: A view of the tower foundations from the wet dock
3/2018