多沙河流跨河桥梁桥墩基础设计研究

摘要

桥梁的基础设计是桥梁安全的根本.在多沙河流上修建跨河桥梁,桥墩的冲刷深度是影响桥梁安全的重要参数之一.通过对黄河下游河段上某桥基础设计的分析研究,详细论述了多沙河流桥墩冲刷深度以及桩周土极限摩阻力对桥墩基础设计的影响,阐述了桥梁工程计算分析与工程试验相结合进行桥墩基础设计的必要性和重要性.结合桥梁的安全性和经济性要求,对多沙河流上的大型桥梁工程,提出了应采取工程试验、水工模型试验与计算分析相结合的方法来合理选择桥梁设计参数的建议.%Foundation design of the bridge is the key point of bridge safety. The scour depth of pier is one of the important parameters affecting bridge safety in the case of bridge spanning above a sandy river. This article, through analysis and researches on the design for a certain bridge's foundation at the lower reaches of the Yellow River, discusses in detail the scour depth of bridge pier at sandy river and the influence of ultimate friction of soil around the pile on bridge foundation design, elaborates the necessity and significance of combining the bridge's computational analysis with the engineering experiment. Further, in combination with the safety and economy requirements of bridge, aiming at the large-scale bridge above the sandy river, the article put forward the suggestion that the bridge design parameters should be selected reasonably by means of combining the engineering experiment, hydraulic model test with the computational analysis.