摘要
上元门越江工程是京沪高速铁路跨越长江的关键工程。为了合理、准确地分析越江工程的兴建对上元门河段的影响 ,采用了资料分析和整体河工模型试验相结合的研究方法。在对工程河段自然概况和工程断面历年变化分析的基础上 ,进行了详细、周密的模型设计。根据长江下游河段泥沙特性 ,专门研制了一种新型的模型沙 ,应用该模型沙对天然实测河床冲淤资料进行了充分的验证 ,既保证了模型与原型水流运动的相似 ,同时也达到了泥沙运动的相似性要求。在方案试验中预报了百年和三百年洪水条件下的壅水、流速分布以及工程断面可能出现的最低河床高程 ,分析对比了工程前后试验河段的水流泥沙运动特性及河床冲淤变化 ,此外还探讨了越江工程对长江上元门河段行洪。
ShangYuanmen Bridge on the Yangtze River is the key part of Jinghu high-speed railway. To analyze the influence of the bridge to the Nanjing reach, the sediment model banding with data analysis is applied. Through the analysis of the river environment and change of the crossing section over the years, a detailed design of the model test is laid out. Based on the characteristic of sediment movement in the lower reaches of Yangtze River, new model sediment is developed. Sufficient contradistinction of test data to field data using the sediment ensures comparability of the flow and sediment movement. The backwater, velocity distribution and minimal bed elevation on the condition of extraordinary floodwater is predicted in the project test. Furthermore the text reveals the characteristics of sediment movement and the rules of bed scour and silting in this reach. Also analyzed is the influence upon flood protection and river evolution by the bridge.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2001年第3期47-50,共4页
China Railway Science
基金
京沪高速铁路越江工程可行性研究子项目 (TJ98DH0 9)
关键词
水文分析
高速铁路
水工模型试验
桥梁
Hydrological analysis
High-speed railway
Hydraulic model test
