Sheet pile installation can’t be done by piling contractor while there is specialist contractor for sheet pile to do the installation. Here is a rough installation procedure for sheet pile:
1) Pile Driving Equipment
Before starting driving sheet pile, a few equipments have to be prepared such as driving hammers and jetting equipment. The driving energy for hammers shall be recommended by the manufacturer so that it’s applicable to relevant sheet pile. While jetting equipment shall have a minimum of two removable or fixed jets of the water or be a combination of air a water type.
2) Placing and Driving
After preparing all the sheet pile driving equipments, sheet piles can be started to place on the location that shown in the construction drawings. Temporary wales, templates, or guide structures have to be carried on to ensure the sheet pilings are placed and driven to the correct alignment.
After the sheet piles is set on place, jetting machine will be starting to driving the sheet piles. Sheet piles have to be driven with the proper size of hammer and by approved methods to ensure no damage to the sheet piles and proper interlocking throughout their lengths. A protecting cap shall be employed on the tops of sheet pile to prevent damage during driving with hammer.
3) Cutting-Off and Splicing
After driving the sheet piles into the ground, if contractor find that they need additional penetration, splicing or jointing works will be carried on. Driving works will be done again for the sheet piles until it reaches its’ limit on the ground. After this, excessive of sheet pile will be cutting-off and removed from the site. All cutting-off work must be done in a neat and workmanlike manner for safety purpose.
4) Inspection of Driven Piling
The contractor shall inspect the interlocked joints of driven sheet piles extending above ground. If contractor find out that the sheet piles are out of interlock, then the sheet piles have to be removed and replaced with a new sheet pile.
5) Pulling and Redriving
After the inspection of driven piling, another similar process has to be carried on which is called pulling and redriving. The contractor shall pull selected sheet piles to determine the condition of the underground portions of sheet piles. If contractor found any damages to the extent that its usefulness in the structure is impaired, then the sheet piles have to be removed and replaced with a new sheet pile.
(This article comes from Pile Driving editor released)