Central Artery / Tunnel Contract No. C19E7 Storrow Drive / Leverett Circle Connectors Boston, Massachusetts Back to Project List Jet Grouting Patented reinforced jet grouted columns provide excavation support for deep foundation construction adjacent to active railways. Project Overview: Layne GeoConstruction designed and constructed a system of reinforced jet grouted columns to provide excavation support and a continuous groundwater cutoff wall between operational AMTRAK and MBTA tracks at the main rail station serving Boston and northern New England. The patented system was utilized in lieu of the contract design that required drilled soldier piles, lagging and permeation grouting. The work was successfully completed in fill and organic soils without disruption to this heavily used station. The project was successfully completed and the new bridge is now open to traffic.     Value of Work Performed: $400,000 Project Duration: 15 months Project Completion Date: 1997 Project Reference: Owner’s Management Consultant Bechtel / Parsons Brinckerhoff David Druss (617) 951-6000