Figure 1 Wrap for timber steel and concrete piles

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Table 5-33

Planning and Estimating Data for Steel Pile Maintenance Using Wrapping

Description of Task: Wrap a steel pipe pile with commercially available polyvinyl chloride (PVC) wrapping sheets from 1 foot above the high waterline to 2 feet below the low mudline. Total length to be wrapped is 10 to 20 feet.

Size of Crew: Dive station, one laborer.

Special Training Requirements: Familiarity with procedures for removal of marine growth and installation procedure for the PVC pile wrap to be used.

Equipment Requirements: High-pressure waterblaster, hydraulic grinder with Barnacle Buster attachment, high-pressure pump for waterblaster, hydraulic power unit, special fastener tools for pile wrapping (dependent on manufacturer), float stage or work platform.

Productivity of Crew: 4 hours per pile.

Materials:

Polyvinyl Chloride Pile Wrap Unit - Commercially available PVC pile wraps are available in many prefabricated sizes to fit various pile sizes and lengths. Some have separate units for splash zone and underwater use, while others are a single unit. Manufacturers' literature should be consulted before ordering.

Foam Seals, Straps, and Special Fittings - Each pile wrap manufacturer has particular foam seals, fasteners, and special fittings. Manufacturers' literature should be consulted before ordering.

Potential Problems: Projections or sharp edges on the pile may puncture or tear the pile wrap, so care should be taken to remove such problems.

Table 5-34

Planning and Estimating Data for Timber Pile Maintenance Using Wrapping

Description of Task: Wrap a timber pile with commercially available polyvinyl chloride (PVC) wrapping sheet from 1 foot above the high waterline to 2 feet below the mudline. Total length to be wrapped is 20 to 30 feet.

Size of Crew: Dive station, one laborer.

Special Training Requirements: Familiarity with procedures for removal of marine growth, jetting or air lifting procedures, and installation procedure for the PVC pile wrap to be used.

Productivity of Crew: 4 hours per pile (includes cleaning).

Equipment/Materials Requirements: High-pressure wateiblaster, hydraulic grinder with Barnacle Buster attachment, high-pressure pump for waterblaster, hydraulic power unit, air lift or jetting pump and hose, special fastener tools for pile wrapping (depending on the manufacturer), float stage or work platform.

Polyethylene Liner - The intertidal area on any pile wrapping system should be protected from creosote damage by the placement of a polyethylene liner directly on the timber before placement of the PVC wrapping from 1 foot above the high waterline to 3 feet below the low waterline. Alternatively, some PVC wraps can be ordered with a polyethylene liner attached.

PVC Pile Wrap Unit - Commercially available PVC pile wraps are available in many prefabricated sizes to fit various pile sizes and lengths. Consult manufacturers' literature before ordering.

Foam Seals, Straps, and Special Fittings - Each pile wrap manufacturer has particular foam seals, fasteners, and special fittings. Consult manufacturers' literature before ordering.

Potential Problems: Projections or sharp edges on the pile may puncture or tear the pile wrap, so care should be taken to remove such problems.

Table 5-35 Patching Holes in Umber Sheet Piling

Problem: Localized surface areas have deteriorated as a result of rot or marine borer infestation.

Description of Repairs (Figure 1): Clean deteriorated areas removing marine growth and deteriorated wood.

Small Holes: Drive galvanized nails or bronze boat nails partially into wood in die repair area to provide gripping strength for the patch. Fill holes with commercially available epoxy or cement grout. Use manufacturer's application procedure.

Alternatively, cover area with treated ship's felt, available through local boat yards, and fasten in place by covering with 1-inch-thick treated boards attached with galvanized or bronze nails.

Largo: Areas: Cover holes with timber or metal patches. Drive pipe casings behind wall and use pressure grout techniques to fill voids behind wall.

Extensive deterioration of the wall may require more extensive repair techniques such as driving new steel sheet pile behind or in front of the deteriorated wall or forming a new concrete face such as described under repair of steel sheet pile.

Application: These types of repairs will require engineering analysis to evaluate strength and utility of repaired structure. Extensive deterioration may require replacement with a new bulkhead. Partial repair may be more effective in cold water areas where wood deterioration is generally slower.

Underwater cement mortar

Galvanized nails

Section A-A

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    How to wrap a metal marine piling?
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