Deformation behavior and acting earth pressure of three-hinge precast arch culvert in construction process  

作　　者：Yasuo Sawamura Hiroyuki Ishihara Yoshinori Otani Kiyoshi Kishida Makoto Kimura 

机构地区：[1]Department of Civil and Earth Resources Engineering,Kyoto University,Japan [2]Hokkaido Branch,Kajima Corporation,Japan [3]Hirose Hokyodo&Co.,Ltd.,Japan [4]Department of Urban Management,Kyoto University,Japan

出　　处：《Underground Space》2019年第3期251-260,共10页地下空间（英文）

基　　金：supported by the National Institute for Land and Infrastructure Management,MLIT,Japan(grant for the research and development of technologies for improving the quality of road policies,no.24-4,2012-2015).

摘　　要：The three-hinge precast arch culvert consists of two segmental precast units and three hinge points.It harnesses the passive resistance of an embankment by permitting deflection,resulting in a mechanically stable structure.However,the design of the three-hinge precast arch culvert differs from that of a conventional culvert,prompting the mechanical behavior of the culvert to become an important issue.In this study,therefore,1/5 scale model tests were conducted on a three-hinge precast arch culvert to measure the changes in the inside width and earth pressure acting on the culvert at each step in order to investigate the culvert’s mechanical behavior at each construction stage.Moreover,the deflection measurement of the culvert was obtained at the in-situ construction site.The results indicate that the arch members were displaced according to the embankment depth in a similar manner to the design load.Therefore,the horizontal earth pressure,which was larger than the earth pressure at rest,acted on the culvert at the end of its construction.

关 键 词：Precast arch culvert Construction process Coefficient of earth pressure Inside width 

分 类 号：U449[建筑科学—桥梁与隧道工程]