Rennard Street Pumping Station Project

Sci-Tek provided geotechnical engineering services associated with the design of extensive modifications to the existing Philadelphia Water Department Rennard Street Pumping Station Site. The modifications included a small gravity retaining wall to support the access roadway, and changes to the existing below-grade wet well.  Sci-Tek performed a geotechincal subsurface exporation, including the following tasks:

• Reviewed available site drawings, geotechnical and geologic information, and test boring information for the site.
• Reviewed and revised the Test Boring Location Plan prepared by ATC/BCM Engineers, the design and construction project engineer.
• Prepared a table showing the purpose, elevation, planned depth, and termination criteria for each test boring.
• Drilled three test borings at the planned locations and depths, including continuous split-spoon sampling in the fill/soil zone at each boring.
• Provided a full-time project representative during drilling to observe if the drilling work is in general conformance with applicable standards, Visually describe and log the soil and rock samples obtained, select location and depth of Shelby samples if needed, and obtain ground water level readings.
• Selected representative samples of the soil and rock recovered for laboratory testing of physical properties.
• Developed typed logs of the subsurface data obtained at the test boring locations.
• Estimated the soil and rock engineering parameters for the materials encountered at the test boring locations and evaluated shallow foundation considerations based on the data obtained. This includes the following:
  • Bearing capacity and settlement of the proposed retaining wall and prefabricated building foundations
  • Lateral earth pressure on the proposed retaining wall and subgrade walls for submerged and unsubmerged conditions with HS20 wheel loads
  • Differential settlement potential
• Performed preliminary or typical segmental wall design.