10
Figure 5. Structure of large diameter RD piles.
a top hammer is used. Instructions for the handling and
installation of splices, as well as the dimensions of threaded
sleeves and recommended types and dimensions of ring
bits are presented in Sec. 7.4.4 of these instructions. The
sleeves meet the requirements for rigid splices of Piling
Manual PO-2016 and the National Annex to Eurocode
1993-5, Design of steel structures, Steel piles (Table 10).
The splice is guaranteed a tensile strength that is 50 % of
the compressive strength of the pile when the handling and
installation of the splice are done according to Secs. 7 and 8.
All RD piles may also be spliced by welding.
The piles are delivered either as pile pipes or RD pipe sections
with threaded ends. The lengths of pile pipes and sections are
shown in Table 9. The inside burr of the longitudinal seam of
RD90-RD320 piles can be removed in individual projects to
order. With the most commonly used pilot bits the removal
of the inside burr is usually not necessary, but the pilot bit
should be selected considering the effect of the burr.
RD piles can be identified by the marking on their side.
Pile bundles are delivered with product descriptions that
indicate, besides pile manufacturer and dimensions, the
steel grade of the RD piles. If these markings are missing,
the pile pipe must not be used in RD piles.
2.5.2 Splicing and steel grade selection of RD piles
RD-piles are spliced using external threaded sleeves (
t
≥
8mm
and
D
≤
220mm) (Figure 6), by threaded and welded splice
pieces (RD270/10, RD270/12,5, max
f
y
= 460 MPa ;
RD320/10, RD320/12,5, max
f
y
= 550 MPa) or by welding.
Mechanized welding is used specially in underpinning
projects. When using a DTH hammer, the threads of the pile
pipe and the sleeve are left-handed, but right-handed when
RD
®
RDs
®
Figure 6. Splice sleeves of RD and RDs piles
Table 9 a. and table 9 b. Length range of RD and RDs piles
Pile type
Lenght of pile pipe without threads
1 m 1.2 m 1.5 m 2 m 3 m 4 m 6 m 12 m 12-16 m 16-34 m
RD90
O
O
O
O
O
O
X
-
-
-
RD115/6.3
O
O
O
O
O
O
X
O
-
-
RD115/8
O
O
O
O
O
O
O
X
O
-
RD140-RD320
O
O
O
O
O
O
O
X
O
-
RD400-RD1200
O
O
O
O
O
O
O
X
O
O
RDs90
O
O
O
O
O
O
O
-
-
-
RDs100
O
O
O
O
O
O
O
-
-
-
RDs115/6.3
O
O
O
O
O
O
O
O
-
-
RDs115/8
O
O
O
O
O
O
O
X
O
-
RDs125/6.3
O
O
O
O
O
O
O
X
-
-
RDs140-RDs320
O
O
O
O
O
O
O
X
O
-
X = stock sizes
O = project-specific size
- = not available
Pile type
Length of pile section with threaded ends
1 m 1.2 m 1.5 m 2 m 3 m 4 m 6 m 12 m
RD115/8
O
O
O
O
X
O
O
O
RD140/8
O
O
O
O
O
O
O
O
RD140/10
O
O
O
O
O
O
X
O
RD170/10
O
O
O
O
O
O
X
O
RD170/12.5
O
O
O
O
O
O
X
O
RD220/10
O
O
O
O
O
O
O
O
RD220/12.5
O
O
O
O
O
O
X
O
RDs115/8
O
O
O
O
O
O
O
O
RDs140/8
O
O
O
O
O
O
O
O
RDs140/10
O
O
O
O
O
O
O
O
RDs170/10
O
O
O
O
O
O
O
O
RDs170/12.5
O
O
O
O
O
O
X
O
RDs220/10
O
O
O
O
O
O
O
O
RDs220/12.5
O
O
O
O
O
O
X
O
Pile type
Length of pile section with threaded splice pieces
6 m
12 m
RD270/10
O
O
RD270/12.5
O
O
RD320/10
0
O
RD320/12.5
0
O
RDs320/10
0
O
RDs320/12.5
0
O