19 June 2001
SR-3: PARTIAL REPLACEMENT OF STEEL PILE
to heavy deterioration (greater than
of the upper
cross-sectional area of the H-pile has occurred.
Description of Repairs: Cut out the corroded section of pile; be sure that the
bottom cut and top cut (if applicable) are square. Temporary supports may be
needed to transfer the load from the pile being repaired to adjacent piles.
Fabricate a welded assembly consisting of: a 25 mm (1-inch) steel bearing plate,
two 10 mm (2/5-inch) steel side plates, and four steel angles. Place over the
bottom cut. Drill and bolt the bearing assembly to the remaining lower steel pile
using 32 mm (1 -inch) galvanized steel bolts. Add cathodic protection to new
Intermediate Replacement (see Figure 8-3): Cut a section of new H-
pile to fit the missing length of pile and weld a 25 mm (1-inch) steel bottom
bearing plate to the new section. Place the intermediate section into position and
bolt the bearing plates together. Weld the upper joint and four 16 mm (5/8-inch)
steel splice plates to both old upper and new H-pile sections.
Total Upper Section Replacement (see Figure 8-3): Cut a new section
similar to that required for intermediate replacement, except cut to fit under the
concrete cap using a 25 mm (1-inch) steel bearing plate bolted to the cap. This
arrangement is necessary when the steel has corroded extensively at the
concrete-steel interface. All new metal should be cleaned and coated before
installation. Welded joints should be cleaned and coated after welding. All welded
joints should be watertight.
Application: This method restores the structural strength lost in the deteriorated
upper section. Corrosion can again occur once the coating fails. Economics will
Future Inspection Requirement: Same as for new steel pile sections.