摘要
防洪影响评价对保障河道行洪安全和跨河桥梁结构安全具有重要意义.文章通过收集淠杭干渠跨河桥桥址处的水文资料,结合水文分析手册及规范,从设计洪水、壅水、行洪能力和河道冲刷等方面对跨河桥梁的防洪影响进行论证分析.结果表明:跨河桥梁 1 号、2 号桥墩虽占用河道行洪断面,但其阻水比均在 6%以内,对河道流势、行洪能力和防洪安全等影响均较小.通过采取统筹岸坡开挖补偿宽度、及时清理废弃渣料等措施,可降低跨河桥梁建设对河道防洪、供水等功能的影响.
Abstract
The flood impact assessment is of significant importance for ensuring the flood safety of the river channel and the structural safety of the cross-river bridge.This paper,by collecting hydrological data at the site of the Pihang Canal Cross-River Bridge,combines hydrological analysis manuals and regulations to provide a comprehensive analysis and demonstration of the flood impact on the bridge,considering aspects such as design floods,water blocking,flood carrying capacity,and riverbed erosion.The results indicate that although the piers of Cross-River Bridge No.1 and No.2 occupy sections of the river channel,their obstruction ratios are all within 6%,resulting in minimal impact on river flow,flood carrying capacity,and flood safety.By implementing measures such as coordinated bank slope excavation and compensation width,and timely removal of waste materials,the impact of the bridge construction on river flood control and water supply functions can be reduced.
NETL
NSTL
维普
万方数据