TM 5-5420-278-100036 000036 00-7/8 blankBRIDGE OPERATION (Contd)f. Shore erosion. During periods of heavy traffic, wave action may cause the shoreto erode under the approach ramp end of the bay. The end span anchorage system(shore lines) must be taut to keep bridge movement and subsequent erosion to aminimum. If erosion becomes significant, the ramp bay should be raised and sandbags or other suitable fill material must be placed under ramp inner pontons. Theramp bay should be lowered and securely anchored prior to vehicle crossing. Thiscondition can often be eliminated by adding an interior bay to the center of thebridge, and pulling the ramps farther onto the shore.g. Leakage. At three-hour intervals during heavy traffic, inspect the ponton bilgesfor water by removing the bilge plugs from the roadway deck using T-wrench. Ifmore than 6 in. (15 cm) of water is discovered, pump it out as described in WP 0053 00. If a hole is observed, monitor the bridge or raft’s performance. If visualevidence of taking on water is observed (such as riding low in water), pump thewater out while operations continue. If the water intake is faster than the pumpingcapacity, remove and replace the damaged bay. The damaged bay is deadlined untilrepairs are made.h. Water debris. Do not allow debris to build up against upstream side of bridge.Remove debris immediately to prevent damage to bridge.CAUTIONEnsure all gravel, rocks, mud, and other debris areremoved from openings at unfolding stabilizermounting brackets prior to folding bay. Failure tocomply may cause jamming during folding operations.i. Roadway debris. During periods of heavy traffic, dirt and foreign materialsmay accumulate on roadway surface. Wash down roadway surface using pressurepump as described in WP 0053 00.END OF WORK PACKAGE
Integrated Publishing, Inc. - A (SDVOSB) Service Disabled Veteran Owned Small Business
