7.4 岸坡冲刷...........................................................................................................................................12 8 涉河桥梁其它要求 ............................................................... 13 附录 A ........................................................................... 15 附录 B ........................................................................... 17 1 阻水率计算..........................................................................................................................................17 2 桥前壅水计算......................................................................................................................................18 3 冲刷计算...............................................................................................................................................22 编制说明......................................................................... 26 1 总则......................................................................................................................................................26 2 术语.......................................................................................................................................................26 5 涉河桥梁的防洪评价..........................................................................................................................31 6 涉河桥梁布置......................................................................................................................................31 7 涉河桥梁水利控制条件......................................................................................................................32 8 涉河桥梁其它要求..............................................................................................................................33
本规定主要起草人：周柏林 周北达 朱诗好 钟艳红 石志游 田大作 罗正保 杨中笑 张贵金 李梦成 孟艳秋 何怀光
目 录
1 总则 ............................................................................ 1 2 术语 ............................................................................ 2 2.1 水系、干流.........................................................................................................................................2 2.2 支流.....................................................................................................................................................2 2.3 涉河桥梁.............................................................................................................................................2 2.4 河道管理范围.....................................................................................................................................2 2.5 主槽.....................................................................................................................................................3 2.6 防洪标准.............................................................................................................................................3 2.7 设计低水位..........................................................................................................................................3 2.8 河床一般冲刷.....................................................................................................................................3 2.9 河床局部冲刷.....................................................................................................................................3 2.10 岸坡冲刷...........................................................................................................................................3 2.11 桥位....................................................................................................................................................4 2.12 桥墩、承台........................................................................................................................................4 2.13 梁底标高...........................................................................................................................................4 2.14 壅水高度、最大壅水高度和影响范围 ...........................................................................................4 2.15 阻水率...............................................................................................................................................4 3 涉河桥梁等级划分................................................................. 5 4 防洪标准 ........................................................................ 6 4.1 涉河桥梁防洪标准.............................................................................................................................6 4.2 防护对象的防洪标准.........................................................................................................................6 4.3 防洪评价标准......................................................................................................................................6 5 涉河桥梁的防洪评价 .............................................................. 7 6 涉河桥梁布置要求 ................................................................ 8 6.1 桥位.....................................................................................................................................................8 6.2 梁底标高.............................................................................................................................................9 6.3 桥墩及承台布置..................................................................................................................................9 6.4 桥面集中排水...................................................................................................................................10 7 涉河桥梁水利控制条件 ........................................................... 11 7.1 桥梁阻水控制指标............................................................................................................................11 7.2 墩台壅水...........................................................................................................................................11 7.3 流态变化...........................................................................................................................................12