某多跨连续坦拱桥梁设计探析  

Analysis on the design of a multi-span continuous Tan-arch bridge

作　　者：熊诚 危玉蓉 谢杨 XIONG Cheng;WEI Yurong;XIE Yang(Central&Southem China Municipal Engineening Design and Research Institute Co,Ltd.,Wuhan 430010)

机构地区：[1]中国市政工程中南设计研究总院有限公司,湖北武汉430010

出　　处：《福建建筑》2023年第11期134-138,共5页Fujian Architecture & Construction

摘　　要：拱桥造型受所跨越河道水位、桥梁纵坡、景观需求等多方面因素限制,常采用矢跨比小于1/5的拱桥,即“坦拱”。由于拱轴线平坦,拱脚水平推力非常大,基础抗推要求高,极易产生结构安全问题。以某园区景观连续坦拱桥梁为工程背景,详细分析了桥梁总体设计情况、结构建模分析要点及结构验算主要分析结果。通过分析研究,选用了适宜的桥台抗推体系(群桩基础+阻滑板组合体系),并给出了该体系相关构件设计参数及主要计算过程,为类似桥梁设计提供有益的经验参考。The shape of arch bridge is limited by many factors such as the water level across the river,the longitudinal slope of the bridge and the landscape demand,so the arch bridge with the span ratio less than 1/5 is often used,that is,the"tan arch".Due to the flat arch axis,the horizontal thrust of the arch foot is very large,and the requirement of foundation thrust is high,which is easy to cause structural safety problems.Taking the continuous tan-arch bridge in a park as the engineering background,the overall design of the bridge,the analysis points of structural modeling and the main analysis results of structural checking calculation are introduced in detail.Based on the analysis and research,the appropriate abutment pushing system(pile group foundation+resistance slide composite system)is selected,and the design parameters and main calculation process of the relevant components of the system are given,which can provide useful experience reference for similar bridge design.

关 键 词：坦拱 有限元分析 基础抗推 阻滑板 

分 类 号：U44[建筑科学—桥梁与隧道工程]