Laserfiche WebLink
<br /> <br />.. <br /> <br /> <br />~'-Jr~ <br /> <br />(A nl based on) <br />length b <br /> <br />NORMAL CROSSING <br /> <br /> <br />JjW' ..~ <br />w 9 Ant bosed on <br />- _ ~... ;1 rW, (length b Co.s~) <br /> <br />~-.- <br />SKEWED <br />CROSSING <br /> <br /> <br />0.4 <br /> <br />NOTE :- <br />Sway bracing should be included in width of pile bents. <br /> <br />0.3 <br /> <br />:.c: 0,2 <br /><J <br /> <br />0,1 <br /> <br /> .,0. <br /> 1.0. <br /> a.. <br /> (A) 0..8 <br /> a- <br /> 0.7 <br /> 0,8 <br /> 6.Kp=6.Kcr 0.. <br />.02 ,04 .06 ,08 .10 ,12 <br /> <br />o <br />o <br /> <br />J <br /> <br />Wp . Width of pier normal to <br />flow - feet <br />hnl. Height of pier exposed <br />to flow - feet <br /> <br />N <br />A, <br /> <br />Number of piers <br /> <br />rN Wp hn2 : total projected <br />areo of piers normol to <br />flow - square feet <br />Gross water cross section <br />in constriction based on <br />normal water surface. <br />(Use projected bridge <br />length normal to flow <br />for skew crossings) <br />~ <br />A" <br /> <br />Ant. <br /> <br />J . <br /> <br />. <br />" <br /> <br /> <br />1.0. <br /> <br />.40. <br /> <br />.14 <br /> <br />,16 <br /> <br />.18 <br /> <br />Figure 7.-Incremental backwater coefficient for piers. <br /> <br />15 <br />