STP1358

    Instrumentation of Dredge Spoil for Landfill Construction

    Published: Jan 1999


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    Abstract

    The Delaware Solid Waste Authority's Northern Solid Waste Management Center is located outside of Wilmington Delaware at Cherry Island, a former dredge disposal site. Dredge spoils, of very low permeability, range in depths up to 30 m (100 feet) which form a natural “liner” and the foundation for the 140 ha (350-acre) municipal solid waste landfill. The soils beneath the landfill have been extensively instrumented to measure pore pressure, settlement and deflections, using inclinometer casings, standpipe piezometers, vibrating wire piezometers, pneumatic piezometers, settlement plates, liquid settlement gages, total pressure cells and thermistors. The nature of the existing waste and anticipated settlements (up to 6 m (19 feet)) have required some unique installation details. The instrumentation data has been integral in planning the landfilling sequence to maintain perimeter slope stability and has provided key geotechnical parameters needed for operation and construction of the landfill. The performance of the instrumentation and monitoring results are discussed.

    Keywords:

    instrumentation, piezometers, total pressure cells, landfills, inclinometers, thermistors, settlement, municipal solid waste


    Author Information:

    Byle, MJ
    Region 3 Geotechnical Practice Manager, Gannett Fleming, Inc., King of Prussia, PA

    McCullough, ML
    Project Engineer, Gannett Fleming, Inc., King of Prussia, PA

    Alexander, R
    Senior Engineer, Delaware Solid Waste Authority, Dover, DE

    Vasuki, NC
    Chief Executive Officer, Delaware Solid Waste Authority, Dover, DE

    Langer, JA
    Vice President, Gannett Fleming, Inc., Camp Hill, PA


    Paper ID: STP14221S

    Committee/Subcommittee: D18.23

    DOI: 10.1520/STP14221S


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