Construction—EMEA—Poland—Tanks
The Kozienice Plant: DYWIDAG Strand Post-Tensioning Systems for
Poland’s second largest Coal-Fired Power Plant
With a total generating capacity of approximately 2,900MW, the Kozienice Power Plant southeast of Warsaw is Poland’s
second largest coal-fired power plant and consists of 10 generators. In 2014, construction of an 11 th generator started that
will provide an additional 1,075MW of energy after its completion in mid-2017.
A part of this huge construction project is a
retention facility for fly ash produced in the
coal burning process. The fly ash is stored
in 3 identical tanks, each of them providing
20,000m 3 of storage capacity. These slender
concrete structures have inner diameters
of 25.8m, 48.3m high chambers and a wall
thickness of only 300mm.
The tank walls were post-tensioned using
7 strand “hoop” tendons that were installed
112
in the perimeter and anchored in pilasters.
Each “hoop” consists of 2 half-circle tendons.
DSI Construction Poland was awarded
the post-tensioning work. The scope
included the technical support of the
subcontractor during post-tensioning and
the supply of approximately 8,400m of
Type 6-7 SUSPA Systems Strand Tendons
with 1,152 MA Stressing Anchorages.
The 576 bonded tendons in accordance
with ETA-06/0025 consist of Type 0.62",
Y1860S7 strand. Furthermore, DSI installed,
stressed and grouted the strand tendons and
provided different documentation in addition
to the stressing records.
In addition to the tight schedule, the very large
height of the 65m tall tanks represented a
challenge: The highest tendons were installed
at a height of 62.25m above ground.