Page 194 - Water Standards
P. 194
draulic turbine floor, generator piers and generator floor
can be constructed in sequence. The dimensions of the
second stage concrete reserved in the hydraulic turbine
floor shall be ensured to satisfy the enough space for stay
ring installation.
4) Conical pipe interior steel lining, runner chambers and
embedded parts of the stay ring should be installed at a
single time, for the convenience of precise control of the
whole installation. And the second stage concrete should
also be poured at a single time.
5) For places where the second stage concrete cannot be well
combined with the first stage concrete, cement grouting for
joint surfaces shall be carried out when the second stage
concrete reaches the design strength. And during grouting,
lifting of the embedded parts caused by grouting pressure
shall be avoided.
6) For the second stage concrete at narrow sections or places
that are not easily reached, the method of pre⁃packed ag⁃
gregate grouting concrete can be adopted for construction,
and this method shall meet the requirements in Article
2 7 30 of this specification.
3 9 9 All projects with wooden structures, steel structures, mason⁃
ry, building floors, roofs and decoration, etc. for which there are no
special requirements shall comply with the requirements in the current
relevant national standards.
1 8 7