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| Portfolio > Nuclear Power > Nuclear Power Project Detail
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Processing Center, Salem/Hope Creek Nuclear Power Station
Location
Salem County, New Jersey
Client
Public Service Electric & Gas Company
Services Provided
Innovative Technology
Value Engineering
Evaluation of Soft Soils
Project Overview
Schnabel provided value engineering design for a 33,000 square-foot processing center at the Salem/Hope Creek Nuclear Power Station, located along the Delaware River in southern New Jersey. Floating stone columns were proposed as an alternative to more costly deep driven pile foundations typically used for other structures at the station. The system's purpose was to reduce settlements of the foundations and floor slab and provide more uniform support within the upper portions of the hydraulic fill. The stone column foundation was achieved by installing short vertical columns of compacted stone into the deep hydraulic fill that was placed to reclaim the power station area known as Artificial Island.
The stone columns were designed for lengths of only 18 feet to improve soft hydraulic fill soils within the stress depth of the footings. Since the hydraulic fill thickness was about 35 feet, the stone columns were considered as "floating" stone columns with no firm support by underlying strata. This project represented only the second application of this type of stone column construction in the world, and the first in the United States. Since other foundation systems, namely deep driven piles typically 120 feet long, had been used at the facility, foundation cost savings were substantial, totaling $350,000.
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