Types of Pipe Piling
While all of the different piling methods involve driving pipes, different soil conditions and structural needs lend themselves better to different types of pipe piles. Here is an overview of some of the most common:
Unplugged Open-Ended – These pipes are completely open ended. After installation the ground level should be the same inside and outside the pipe. They transfer their load to the soil primarily through friction.
Bottom Plate – This is one of two common plugged piles. In this case the a steel plate is welded to the lower end. The plate is intended to create compression and increase friction to reduce sliding. These are used on rocky terrain where a minimum layer of soil exists between the rock and the pile.
Plugged Open-Ended – These have a plug on the bottom end of the pipe. This causes the soil inside the pipe to be a precise amount lower than outside the pipe.
Steel Pipe with Rock Shoe – This is the other common plug. Rock shoes serve the same function as steel plates, but they are used when the pile comes directly in contact with a rock surface. The equipped shoe must be able to support the entire load, and it will prevent any sliding along the rocky surface.
Franki Pipe Pile – Franki piles are intended to be permanent. They are plugged with a moist concrete filling and can withstand much stronger driving impact than their counterparts.
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