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    Evaluating Four Types of Soil-Structure Conduit Systems

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    New types of concrete pipe conduit construction had been compared analytically with conventional trench-type installations and with construction with soil-cement bedding. The new conduits were of composite construction using in situ concrete bonded to various portions of thin precast cores. Considerable cost savings appeared to be obtainable with composite construction in narrow trenches.

    Tests were conducted with the intention of verifying the assumptions. The removal, examination, and reevaluation of the test pipe and backfill are described, as are unexpected delayed responses in the test installation. New analyses are centered on composite and conventional conduits and on two types of concrete backfilled systems, comparing construction techniques and cost estimates. Means are proposed to obtain actual installations which duplicate theoretical conditions to obtain calculated savings.


    concrete pipe, soil-structure interaction, beams, tests, conduits, economic factors, construction, lateral pressure, soil pressure, loads, backfilling, shear, soil pipes

    Author Information:

    Breitfuss, TK
    Vice president, Engineering, Research and Development, Hydro Conduit Corporation, Newport Beach, Calif.

    Committee/Subcommittee: C13.01

    DOI: 10.1520/STP38073S