STP746

    Impermeabilization of a 300-Hectare Cooling Pond

    Published: Jan 1981


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    Abstract

    The project of the 1200 MW Rio Escondido Thermoelectric Plant, now under construction in northern Mexico, includes a 300-hectare (750-acre) cooling pond. The entire reservoir will be created by building a circumferential embankment and developing the total storage requirement above the natural ground level. The makeup water will be obtained at a high cost from the Rio Grande by means of a 30-km-long aqueduct with a maximum capacity of 2.5 m3/s. Severe restrictions were put on the allowable seepage.

    This paper describes the geotechnical investigations performed for evaluation of the subsoil permeability and the final solution adopted: a clay liner compacted according to a nonstandard procedure. The results obtained in the laboratory and in a full-scale test pond (50 by 50 m) are also presented. During this study the limitations of some accepted tests were put in evidence, and some new techniques were developed.

    Keywords:

    cooling pond, impervious linings, seepage, permeability, field tests, laboratory tests, compaction, clay structure, groundwater


    Author Information:

    Auvinet, G
    Research professorConsultant, Instituto de Ingeniería, National University of Mexico, Ciudad UniversitariaComisión Federal de Electricidad,

    Espinosa, J
    Head, Soil Mechanics Laboratory, P. T. Rio Escondido, Comisión Federal de Electricidad,


    Paper ID: STP28322S

    Committee/Subcommittee: D18.21

    DOI: 10.1520/STP28322S


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