551.1 General Description
This work includes protecting bridge end bent piles located in the stabilized backfill of earth retaining walls.
551.1.01 Definitions
General Provisions 101 through 150.
551.1.02 Related References
A. Standard Specifications Section 535—Painting Structures Section 801—Fine Aggregate Section 806—Aggregate for Drainage B. Referenced Documents ASTM A 123/A 123M ASTM B 512 ASTM D 92 ASTM D 95 ASTM D 992 ASTM D 1241 ASTM D 1743 ASTM D 1621 ASTM D 1622 APHA 426 D
551.1.03 Submittals
General Provisions 101 through 150.
551.2 Materials
A. Cans Place cans of smooth or corrugated steel pipe over piling. Use cans thick enough to prevent buckling while placing and compacting earth-stabilized embankment. Coat both inside and outside of the cans with either of the following: Material Section 2P Coating 535.3.03.D Galvanizing ASTM A 123/A 123M B. Backfilling Cans Use aggregate for the backfilling of cans according to Section 801 or Section 806. C. Corrosion Inhibitor (Grease) Use grease that conforms to the following requirements. Drop point 350 °F (175 °C) minimum ASTM D 1241 Flash point 350 °F (175 °C) minimum ASTM D 92 Water content 0.1% maximum ASTM D 95 Rust test ASTM D 1743 Water soluble ions Chlorides, 10 PPM maximum ASTM B 512 Nitrates, 10 PPM maximum ASTM D 992 Sulfides, 10 PPM maximum APHA 426 D D. Polyurethane Foam Use foam approved for commercial use in Georgia that meets the following requirements: Minimum density 1.5 lbs./ft.3 (24 kg/m³) ASTM D 1622 Compressive strength perpendicular 16 psi (110 kPa) @ 6 percent ASTM D 1621 E. Polypropylene Fluted Sheets Use plastic cardboard ultra-violet stabilized sheets that are at least 48 in. (1.2 m) long. Score or grease sheets to fold around piling and into H-pile web. When adding sections, use at least a 3 in. (75 mm) (shingle style) overlap. F. Duct Tape Use duct tape to patch and secure plastic cardboard and polyurethane. Keep duct tape from grease or pile. Use duct tape in sandy backfill to seal overlaps and prevent sand infiltration.
551.2.01 Delivery, Storage, and Handling
General Provisions 101 through 150.
551.3 Construction Requirements
551.3.01 Personnel
General Provisions 101 through 150.
551.3.02 Equipment
General Provisions 101 through 150.
551.3.03 Preparation
General Provisions 101 through 150.
551.3.04 Fabrication
General Provisions 101 through 150.
551.3.05 Construction
When the plans require, protect end bent piles from negative skin friction by using one of the following methods. A. Method A After driving the end bent piles and before installing the earth reinforcing elements: 1. Place a cylindrical can over each pile to prevent the earth wall backfill material from contacting the pile. Use a can large enough in diameter to give a 1in. (25 mm) minimum clearance from the pile to the inside of the can. 2. Place a spacer between the pile and the can to prevent the can from contacting the pile during wall backfilling. Extend the cans from the bottom of the earth-stabilized backfill to the bottom of the bridge end bent cap. 3. After positioning the cans, seal them at the top while backfilling to keep rubbish or aggregate out of the can. Keep the cans sealed until fill settlement time has expired. 4. When the wall backfill has reached the bottom of the cap and fill settlement time has expired, fill the cans with aggregate. B. Method B Cover the piles with the following amounts of corrosion-inhibiting grease as follows: • Steel piling = 1/16 in. (2 mm) minimum • Concrete piling = 1/4 in. (6 mm) minimum 1. Apply grease only after driving the piles. Treat only the pile portion that will be in contact with the wall backfill. 2. In addition to the grease, install a urethane or polypropylene sleeve to protect the grease coating from the backfill. 3. Use spray-on or preformed sleeves. Replace portions of the sleeve damaged or removed by construction activities during backfill.
551.3.06 Quality Acceptance
General Provisions 101 through 150.
551.3.07 Contractor Warranty and Maintenance
General Provisions 101 through 150.
551.4 Measurement
No separate measurement for payment will be made of the materials and labor required to conform with this specification.
551.4.01 Limits
General Provisions 101 through 150.
551.5 Payment
No separate payment will be made for pile protection. Include all costs incurred in complying with this specification in the price bid for the piling.
551.5.01 Adjustments
General Provisions 101 through 150.
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