Chapter
Apr 26, 2012
Compaction Grouting of Loose Soil Beneath the West Coast's Largest Dry Dock
Authors: M. A. Nykamp, S. R. Boyle, Ph.D., M. M. Bonus, and J. B. SpadyAuthor Affiliations
Publication: Ports 2007: 30 Years of Sharing Ideas: 1977-2007
Abstract
The base slab of the largest dry dock on the west coast of the United States has experienced up to 5 inches of differential settlement under loading from large ships since its construction in the early 1960s. This settlement has resulted in a large depression in the dry dock floor. Soil borings and other geotechnical tests revealed a loose soil zone beneath the depression. Following geotechnical analyses and comparison of options, compaction grouting was judged to be the most appropriate method to improve the loose soils and mitigate ongoing settlement without requiring major structure repair or replacement of the dry dock base slab. Compaction grouting was performed in 2006 to densify the loose soil and extend the life of the dry dock structure. The design of the compaction grouting system from preliminary to final design, changes during construction, and grout operations and results are presented.
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Copyright
© 2007 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
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ASCE Technical Topics:
- Compacted soils
- Compaction grouting
- Construction engineering
- Construction management
- Construction methods
- Geomechanics
- Geotechnical engineering
- Geotechnical investigation
- Grouting
- Hydraulic engineering
- Hydraulic structures
- Ports and harbors
- Shipyards
- Slabs
- Soil dynamics
- Soil grouting
- Soil mechanics
- Soil settlement
- Soils (by type)
- Structural engineering
- Structural members
- Structural systems
- Water and water resources
Authors
Affiliations
M. A. Nykamp
P.E.
Senior Principal Engineer, Shannon & Wilson, Inc.
S. R. Boyle, Ph.D.
P.E.
Senior Associate, Shannon & Wilson, Inc.
M. M. Bonus
P.E.
Project Manager, NAVFAC NW
J. B. Spady
P.E.
Facilities Structural Engineer, Puget Sound Naval Shipyard
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