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Combined walls with CU box piles

Combined walls built up with U-type box piles (CU-2 / CAU-2 / CGU-2) and standard single, double or triple U-type sheet piles. There are several combinations possible to achieve high bending moments and moment of inertia.

These solutions are selected most often for retaining walls with a bearing function, where the box-piles increase the rigidity of the wall and/or the vertical bearing capacity, and are usually longer than the infill sheet piles.

Combiwalls CU/U steel sheet piles | ArcelorMittal
Combiwalls CU/U steel sheet piles

Notes:
  • the equivalent elastic section modulus shown in the tables below is applicable to the element that takes the largest stresses (lowest equivalent section modulus of the system),
  • if the king piles have a different steel grade than the infill sheets, then the stresses in both elements have to be checked separately (with two different equivalent elastic section modulus!!)
  • for double and triple piles, the section properties shown in the table is based on the assumption that the common interlocks are either crimped or welded.
Last modified: February 14, 2019

CAU box piles / AU™ sheet piles

Section
AU 14
AU 16
AU 18
AU 20
AU 23
AU 25
Section 1/1 1/2 1/3 1/4
G Iy Wsys G Iy Wsys G Iy Wsys G Iy Wsys
kg/m2 cm4/m cm3/m kg/m2 cm4/m cm3/m kg/m2 cm4/m cm3/m kg/m2 cm4/m cm3/m
AU 1420872 5303 22015640 6601 80513943 3001 92013037 9801 550
AU 1623082 9903 66017346 2302 03515349 5602 18514443 4401 755
AU 1823698 3604 04517755 0202 26015758 9902 42514851 7601 950
AU 20258111 1604 54519461 8302 52517266 6802 72516258 4602 180
AU 23272126 0505 12520469 5802 83018275 8203 08017066 4102 435
AU 25294139 7505 64522176 8003 10519684 0803 39518473 5902 675

CU box piles / PU® sheet piles
+

Section
PU 12
PU 12S
PU 18
PU 22
PU 28
PU 32
Section 1/1 1/2 1/3 1/4
G Iy Wsys G Iy Wsys G Iy Wsys G Iy Wsys
kg/m2 cm4/m cm3/m kg/m2 cm4/m cm3/m kg/m2 cm4/m cm3/m kg/m2 cm4/m cm3/m
PU 1222056 6702 81016532 0801 59014733 2901 65013829 1901 370
PU 12S23760 2002 97517834 1201 68515835 1701 73514830 8301 450
PU 1825696 7004 09019254 3702 30017158 0002 45016050 9401 980
PU 22287122 9004 97521568 7302 78519273 9402 99518064 9202 395
PU 28339160 0006 41525588 3903 54522696 3103 86021284 3703 050
PU 32381181 3307 27028599 7904 000254108 6604 35523895 0703 445

CGU box piles / GU® sheet piles
+

Section
GU 7N
GU 7S
GU 11N
GU 14N
GU 18N
GU 22N
GU 28N
GU 32N
GU 16‑400
Section 1/1 1/2 1/3 1/4
G Iy Wsys G Iy Wsys G Iy Wsys G Iy Wsys
kg/m2 cm4/m cm3/m kg/m2 cm4/m cm3/m kg/m2 cm4/m cm3/m kg/m2 cm4/m cm3/m
GU 7N14727 5201 58511015 6309009816 1409309214 160775
GU 7S15430 3501 74011617 15098510317 8101 0209615 610845
GU 11N20146 1202 57015125 7901 43513427 0001 50512523 6101 235
GU 14N21473 4403 18516141 5201 80014344 0901 91513438 7601 550
GU 18N25696 7004 09019254 3702 30017158 0002 45016050 9401 980
GU 22N287122 9004 97521568 7302 78519273 9402 99518064 9202 395
GU 28N339160 0006 41525588 3903 54522696 3103 86021284 3703 050
GU 32N381181 3307 27028599 7904 000254108 6604 35523895 0703 445
GU 16‑40031063 1803 76023235 2702 10020736 1102 15019431 4601 805


G Mass of the system
Iy Moment of inertia
Wsys Equivalent elastic section modulus