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Division I MPS Diversion Structure
Project Information
- Project Location:
- Washington, DC
- Status:
- Completed
- Structure Type:
- Sewage / Water Treatment Plant
References
- General Contractor:
- Corman Construction, Inc
- Client:
- DC Water
Scope Of Work
THE PROJECT
The DC Clean Rivers Project is a major sewer and water infrastructure project intended to minimize sewage outfall to nearby rivers within the Washington, DC metro area. Division I – Main Pumping Station Diversion Structure is a new structure included in the project that connects existing brick sewers to the proposed main pumping shaft.
THE CHALLENGE
Construction of the Division I shaft required deep earth retention constructed in relatively poor soils. Excavation to a depth of approximately 25 feet caused concerns about water inflow into the shaft and the stability of the soft soils near the shaft and tunneling operations as well as below the existing sewer lines.
THE SOLUTION
HBI’s jet grouting provided underpinning and support to the existing utilities, increased passive resistance to the earth retaining system, and reduced water inflow into the excavation. Additional jet grout columns were strategically added to facilitate the excavation and installation of additional utilities.
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