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Design and Construction of Stone Column Reinforced Cofferdams

by R. Robert Goughnour, GeoSystems Inc, United States,
John S. Jones, GeoSystems Inc, United States,



Document Type: Proceeding Paper

Part of: Foundation Engineering: Current Principles and Practices

Abstract:

A recent expansion of the North Carolina State Port Facility, at Wilmington, involved the use of six cellular cofferdams as earth retaining structures during dredging and final filling operations. The piling for the 62-ft (18.9 m) diameter cofferdams was driven through 5 to 60 ft (1.5 to 18.3 m) of extremely soft silty clay river sediments, and a minimum of 3 ft (0.92 m) into a cemented sand (marl) substratum. Descriptions of soil conditions, stone column design, and the construction procedure are given.

Subject Headings: Cofferdams | Rocks | Soil cement | Soft soils | Retaining structures | Pile foundations | Foundation design | North Carolina | Delaware | United States

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