haywardbaker.com Jet Grouting Wentworth Institute of Technology | Beatty Hall | Boston, MA Kevin Dawson, PE, Vice President, New England Area Manager
Presentation Overview • Overview of jet grout underpinning • Overview of risk and reward of jet grout underpinning • Project Summary - Holyoke Medical Center • Conclusions 56
Jet grouting is… An erosion based ground improvement system used to create in situ cemented geometries of soil and binder (Soilcrete). 57
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Existing Footings ~ Soilcrete ~ 60
Risks and Rewards of Jet Grout Underpinning Versus Pit Underpinning Rewards Risks: • Heave/settlement • Reduced schedule • Ability to measure structure • Reduced cost response and react • Adaptable to challenging geometry 61
Risk Reward Relationship 62
Holyoke Medical Center Emergency Department Expansion Owner – Holyoke Medical Center Architect - SMRT Construction Manager – G. Greene Construction Site Contractor – A.J. Virgilio Underpinning Contractor – Hayward Baker, Inc. 63
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Installed Liquid Level Settlement Monitoring System 66
Test Column Installation 67
Confirmed Geometry 68
Jet Grout Production 69
Drilled Tiebacks Through Soilcrete 70
Final Excavation 71
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