既有大跨径砌体排水拱涵加固设计方法  

A Reinforcement Design Method for Existing Large-span Masonry Arch Culvert with Drainage

作　　者：万巨波 石柳 赵方舟 李壮 梁建国 WAN Jubo;SHI Liu;ZHAO Fangzhou;LI Zhuang;LIANG Jianguo(Hunan Sany Polytechnic College,Changsha Hunan 410129,China;College of Civil Engineering,Changsha University of Science&Technology,Changsha Hunan 410114,China)

机构地区：[1]湖南三一工业职业技术学院,湖南长沙410129 [2]长沙理工大学土木工程学院,湖南长沙410114

出　　处：《长沙大学学报》2023年第5期48-53,共6页Journal of Changsha University

基　　金：长沙市政府项目“红旗渠主渠结构加固试验段工法研究及实施”,编号:CSCG20200598。

摘　　要：建于20世纪的既有城市地下大跨径分离式基础砌体排水拱涵已超出服役期,当鉴定其需要加固时,往往采用整体式高性能混凝土内衬进行,其结构传力方式以及土-结构相互作用将发生变化。以湖南省长沙市红旗渠试验段加固工程为例,研究不同地层弹性抗力系数取值方法,提出了考虑土-结构相互作用的分布弹簧约束的荷载-结构法,并与拱形刚架法、固定无铰拱法和弹性支承无铰拱法的计算结果进行了对比分析,提出了各种计算方法的适用性,对城市地下砌体排水拱涵的设计和加固设计具有借鉴意义。Urban underground large-span masonry arch culverts built in the last century have exceeded their service period and require reinforcement after reliability appraisal.However,the conventional approach of reinforcing them with integral highperformance concrete linings can alter the force transmission and soil-structure interaction.Taking the reinforcement project of the test section of the Hongqi Canal in Changsha City,Hunan Province as an example,this paper presents a load-structure method that considers the distributed spring restraint and soil-structure interaction by studying the elastic resistance coefficients of different soil layers.The calculation results obtained from the load-structure method are compared and analyzed with those from the soil layer-structure method,arched steel frame method,fixed hingeless arch method and elastic support hingeless arch method.The applicability of various calculation methods is discussed,providing valuable insights for the design and reinforcement of urban underground masonry arch culverts with drainage.

关 键 词：砌体排水拱涵 土-结构相互作用 地层弹性抗力系数 荷载-结构法 内力分析 

分 类 号：TU449.84[建筑科学—岩土工程]