Accession Number : AD0761725

Title :   Spillway for Markland Locks and Dam, Ohio River, Kentucky and Indiana: Hydraulic Model Investigation.

Descriptive Note : Technical rept. Oct 52-Sep 57,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s) : Gilcrest,B. R. ; Moors,A. J. ; Bierhorst,J. W. , Jr

Report Date : MAY 1961

Pagination or Media Count : 60

Abstract : Model investigations of the spillway for Markland Dam were concerned initially with a design using a split-leaf vertical-lift gate, and finally with a design using five submergible and seven nonsubmergible tainter gates. Section models reproducing one gate bay and adjacent half gate bays at scales of 1:36 (vertical-lift gate) and 1:25 (tainter gates) were used for study of gate hoist loads and vibration tendencies due to hydraulic forces, and stilling basin performance. Also, a 1:4-scale model of a section of the face of the submergible tainter gate and the downstream face of the gate sill was used for detailed study of pressure conditions and observation of the behavior of an inflatable-type bottom seal for the gate. A satisfactory design for the more economical plan using tainter gates was developed. Loads on the submergible tainter gate due to hydraulic forces were not excessive, and with the top of the gate shaped so as to ensure positive pressures, oscillation of the gate is considered unlikely. Tests in the 1:4-scale model revealed that the gap between the face of the gate and the gate sill must not flare more than about 1 in. in order to maintain relatively stable pressures on the gate and sill. Tests of the bottom seal disclosed undesirable flutter when the seal was deflated and the gate submerged; this seal was abandoned for Markland Dam.

Descriptors :   (*DAMS, *HYDRAULIC MODELS), MODEL TESTS, RIVERS, STRUCTURES, LOADS(FORCES), VIBRATION, PERFORMANCE(ENGINEERING), KENTUCKY, INDIANA

Subject Categories : Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE