CEMP-E
EI 02G001
01 July 1997
Table 1-8. Composite Piles.
LENGTH
18 - 60 M (60 - 200 FT)
MATERIAL
ACI 318 FOR CONCRETE
SPECIFICATION
ASTM A36 FOR STRUCTURAL STEEL
ASTM A252 FOR STEEL PIPE
ASTM D25 FOR TIMBER
DESIGN
33% OF 28-DAY CONCRETE STRENGTH
STRESSES
62 MN (9 KSI) FOR STRUCTURAL AND PIPE SECTIONS
SEE TABLE 1-1 FOR TIMBER
WEAKEST MATERIAL GOVERNS ALLOWABLE STRESSES
DESIGN LOADS
3 - 10 MN (30 - 100 TONS), WEAKEST MATERIAL GOVERNS
ALLOWABLE LOAD
DISADVANTAGES
DIFFICULT TO OBTAIN GOOD JOINT BETWEEN DISSIMILAR MATERIALS
EXCEPT FOR THE PIPE COMPOSITE PILE
ADVANTAGES
LOW COST
HIGH CAPACITY FOR PIPE AND HP COMPOSITE PILES
INTERNAL INSPECTION POSSIBLE FOR PIPE COMPOSITE PILES
EASY TO ADD SECTIONS
NO SOIL HEAVE
APPLICATION
RESIST TENSION FORCES SUCH AS FROM EXPANSIVE SOIL OR UPLIFT
LOADS
REMEDIAL REPAIR
ILLUSTRATION
1-11
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