Model investigations were conducted to determine the adequacy of the designs of two gravity spillways (Spillways A and B) to be located on the Tennessee-Tombigbee Waterway. The investigations wer e primarily concerned with evaluation of the tendency for surging of flow on the spillway tainter gates, defining the discharge characteristics of the structures, and ensuring adequate stilling basin performance. The models indicated that basic features of the original design structures were unsatisfactory; however, modifications that improved hydraulic performance were developed. There was no tendency for surging on the tainter gates. Discharge characteristics of both spillways for controlled and uncontrolled flows were determined . Divider walls were located in the stilling basins downstream of the piers to eliminate unsatisfactory flow conditions that occurred during single gate operations. Additional features investigated in the model of Spillway B included measurement of crest pressures. No adverse pressures were observed. Addition of a 45- degree slope to the face of Spillway B did not affect its hydraulic performance. The model of Spillway B also indicated that the stilling basin apron could be raised 9 ft without impairing the performance of the structure. The size of riprap needed in the exit channel downstream of Spillway B was determined. The magnitudes of dynamic forces to be expected on the stilling basin divider walls of Spillway B were estimated.


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    Titel :

    Typical Tennessee-Tombigbee Canal Section Spillways, Spillways A and B: Hydraulic Model Investigation



    Erschienen in:

    Erscheinungsdatum :

    1978


    Format / Umfang :

    6598264


    Medientyp :

    Report


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :