الفهرس 
Uses of The Floating BridgesOnly 14 pages are availabe for public view
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Abstract
Floating bridges may be temporary or permanent bridges supported by low flat-bottomed boats or pontoons. Most early floating bridges were built for military purposes. The Chinese, Romans, Greeks, Mongols and other peoples all used versions of pontoon bridges to move soldiers and equipments, usually across rivers too deep to ford as Egyptians did in the big war ”October 1973”.
Temporary types of pontoon bridges are more common than permanent ones. These bridges may be used in emergencies and often come in handy when there is need to move people and equipments over rivers or lakes. It was installed in Shebin El-kom during the period of maintenance of the main bridge.
This research was made to study experimentally and numerically the effect of floating bridge on flow characteristics and bed configuration parameters at floating bridge site.
Two hundred and twenty eight experiments were conducted in the irrigation and hydraulics laboratory, faculty of engineering, Menoufia University. The model consisted of four wooden pontoons connected together with the help of two wooden rods. Experiments were divided into two parts according to the type of load, static load with constant submergence ratio and dynamic load with free submergence ratio. The runs were carried out under considered pontoon lengths, tail water depths, ratios between pontoon width and distance between pontoons in the perpendicular direction of water, submergence ratios, and constant discharge.
Samples of contour maps of scour hole and scour profiles in the longitudinal direction at the point of maximum scour depth and at the center line of the channel. Some samples of velocity distribution profile, and water surface profile samples were also presented.