铁路跨河桥梁工程防洪评价常见问题探讨

发布时间：2018-01-30 11:05

本文关键词： 高速铁路跨河桥梁桥墩防洪评价　出处：《水利水运工程学报》2015年06期 　论文类型：期刊论文

【摘要】：针对连淮扬镇高速铁路约200座桥梁工程要考虑防洪评价共性问题,如大量桥墩布置在行洪或排引水渠道内、堤身设计断面布置桥墩、桥轴线法向与水流交角偏大等进行总结并探讨解决措施、提出建议。导致桥墩位置布置不合理的最根本原因是铁路线位的确定过程中水利部门参与不深入,防洪评价专题工作开展滞后,未能在设计时充分考虑堤防安全、河势稳定、行洪通畅等因素。另外,方案设计仅依据已颁布的水利相关规划,未参考正在编制或修编中的重大水利规划是引起防洪安全隐患的另一重要原因。高铁桥墩通常尺度较大,有明显水流控导作用,墩柱与水流交角较大时会引导水流冲刷堤岸,对堤防安全造成直接威胁。分析表明加大桥跨和偏转桥墩是两种潜在的解决方法,但前者增加投资成本,后者受限于当前桥梁设计理论,加大桥跨可能伴随施工困难显然不是最佳解决途径,桥梁设计的"斜桥斜做"理论亟待突破。
[Abstract]:Some 200 bridges in Lianhuai Yang Town High Speed Railway should consider the common problems of flood control evaluation, such as a large number of piers are arranged in flood discharge or drainage channels, and piers are arranged in the design section of levees. The main reason for the unreasonable location of bridge piers is that the water conservancy department is not deeply involved in the determination of railway line position. The special work of flood control evaluation has lagged behind and has not been fully considered in the design of levee safety, river regime stability, flood flow unobstructed and other factors. In addition, the scheme design is only based on the published water conservancy related plans. The major water conservancy planning which is not in the process of preparation or revision is another important reason that causes the hidden danger of flood control. The piers of high-speed railway are usually of large scale and have obvious flow control and guide function. When the angle between pier column and water flow is big, it will lead the water flow to wash the bank, which will directly threaten the safety of the embankment. The analysis shows that increasing bridge span and deflection pier are two potential solutions, but the former increases the investment cost. The latter is limited by the current bridge design theory, and it is not the best solution to increase the possible construction difficulties associated with the bridge span, and the theory of "inclined bridge doing" in bridge design needs to be broken through urgently.
【作者单位】：南京水利科学研究院水文水资源与水利工程科学国家重点实验室;河海大学港口海岸及近海工程学院;
【基金】：江苏省水利科技项目(2014073)
【分类号】：U442.3
【正文快照】： 铁路建设和水利建设都是基础性的民生工程,铁路建设中跨河桥梁工程要考虑水流阻力、堤防安全、防汛通道等影响因素,同时涉及铁路工程投资和水利工程安全及维护费用,因此防洪评价十分重要。铁路跨河桥梁工程防洪评价目的是就工程建设可能对工程所在地堤防、建筑物的防洪影响进

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