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Table 5-11

Figure 2. Addition of new steel pile adjacent to existing pile cap.

Table 5-11

Figure 2. Addition of new steel pile adjacent to existing pile cap.

For the technique to be effective, a seal must be installed top and bottom to prevent flushing of water. For H-piles this is accomplished by installing expanded styrene blocks to fill the channel voids approximately 1 foot above MHW and at the bottom of the pile section to be wrapped (Figure 5-18). The foam blocks are slighdy larger than the channel dimensions so they must be forced into place. Manufacturers of pile wraps provide styrene blocks which can be cut to fill the void.

A sealing compound is applied along the edges where the blocks come in contact with the pile. A foam gasket is then wrapped around the pile at the block to provide a sealing surface for the pile wrap.

High-impact styrene covers are installed over the exposed edges of the H-pile, along the length of the wrap. The covers bridge the channel gap. These covers protect the pile jacket from being ruptured from floating or submerged debris. Finally, the pile wrap is installed and strapped into place according to manufacturer's instructions.

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