大跨径多孔拱桥设计关键技术

Key Technologies for the Design of Large Span Bridge with Multi-Arch

通过乐山岷江二桥设计,全面阐述了大跨径多孔拱桥的设计过程及计算分析方法。在拱桥计算分析时,详细考虑了桩土共同作用、连拱效应、混凝土收缩徐变等因素对拱桥受力性能的影响,并重点分析了某一拱跨破坏时,单向推力墩的极限承载能力,以确保拱桥不发生整体垮塌。

In this paper,design process,calculation and analysis methods of multi-arch bridge are comprehensively expounded based on the design of the Second Leshan Minjiang bridge. Effects of the interaction between pile and soil, the multi-arch effect, concrete shrinkage and creep on the performance of the arch bridge are considered in detail when the arch bridge is calculated and analyzed. The ultimate bearing capacity of single direction thrusted pier is analyzed emphatically when one arch is damaged to ensure that the arch bridge will not completely collapse.