工程科学学报.第43卷.第11期：1522-1533.2021年11月 Chinese Journal of Engineering,Vol.43,No.11:1522-1533,November 2021 https://doi.org/10.13374/j.issn2095-9389.2021.03.07.002;http://cje.ustb.edu.cn 新型装配式双舱综合管廊节点的力学性能试验 匡亚川)区，姜厉阳)，刘胤虎，莫小飞)，伏亮明)，罗时权) 1)中南大学土木工程学院，长沙4100752)中国电建集团中南勘测设计研究院有限公司，长沙4100143)重庆金科地产集团股份有限公 司，重庆400000 区通信作者，E-mail:kuangyachuan@csu,edu.cm 摘要预制装配综合管廊结构中，节点是结构的薄弱环节，其力学性能直接影响整体结构的变形和承载力等.本文提出了 一种“U型套箍插筋连接”新型装配式双舱综合管廊结构，通过4个节点足尺试件力学性能试验，包括1个底部L型现浇边节 点试件，1个底部L型装配边节点试件，1个顶部L型装配节点试件和1个底部T型装配节点试件，以此来验证“U型套箍插 筋”连接技术的有效性.试验得到了节点足尺试件的开裂荷载、裂缝发展规律、承载能力、破坏方式、构件延性等力学性能. 试验结果表明：新型装配式管廊节点试件都在靠近角点区域发生弯剪破坏，具有较高的承载力和延性：采用“U型套箍插筋” 连接性能可靠，能够获得与现浇节点试件相当的力学性能. 关键词装配式综合管廊：U型套箍插筋连接：节点足尺试验：破坏形态：承载力：延性 分类号TU990.3 Experimental study of mechanical properties of joints in a new-type prefabricated double cabin utility tunnel KUANG Ya-chuan,JIANG Li-yang,LIU Yin-he),MO Xiao-fe,FU Liang-ming,LUO Shi-quan) 1)School of Civil Engineering,Central South University,Changsha 410075,China 2)Power China Zhongnan Engineering Corporation Limited,Changsha 410014,China 3)Jinke Property Group Co.,Ltd.,Chongqing 400000,China Corresponding author,E-mail:kuangyachuan@csu.edu.cn ABSTRACT Modernization of urban infrastructure is the premise for improving urban operation efficiency.The traditional direct burying method of the municipal public pipeline requires repeated excavation for maintenance,which seriously affects the traffic and appearance of the city and interferes with the everyday life and work order of residents.With the rapid development of urbanization recently,the city's underground utility tunnel appears at a historical juncture.To cope with the industry's urgent need for efficient and green construction technology,China is strongly promoting urban utility tunnels and its development toward prefabrication.The prefabricated utility tunnel efficiently uses the urban underground space,intensively manages various municipal pipelines,and solves the "zipper road"problem;it also has the advantages of increased production efficiency in a short construction period and green environmental protection.The joint is the weakest link of the structure in a prefabricated utility tunnel,and its mechanical properties directly affect the deformation and bearing capacity of the entire structure.A new type of prefabricated double cabin utility tunnel with a "U-shaped ferrule joint bars connection"was proposed.The validity of the method was confirmed through testing the mechanical properties of four full-scale joints,including one bottom L-shaped cast-in-place side joint,one bottom L-shaped assembly side joint,one top L-shaped assembly joint,and one bottom T-shaped assembly joint specimen.The result obtained the mechanical properties of the joint full-scale specimen,such as cracking load,crack development law,bearing capacity,failure mode,and member ductility. 收稿日期：2021-03-07 基金项目：国家自然科学基金资助项目(51878663)：中南电力建设股份有限公司科技项目新型装配式双舱综合管廊节点的力学性能试验 匡亚川1) 苣，姜厉阳1)，刘胤虎2)，莫小飞3)，伏亮明2)，罗时权2) 1) 中南大学土木工程学院, 长沙 410075    2) 中国电建集团中南勘测设计研究院有限公司, 长沙 410014    3) 重庆金科地产集团股份有限公 司, 重庆 400000 苣通信作者， E-mail: kuangyachuan@csu.edu.cn 摘    要    预制装配综合管廊结构中，节点是结构的薄弱环节，其力学性能直接影响整体结构的变形和承载力等. 本文提出了 一种“U 型套箍插筋连接”新型装配式双舱综合管廊结构，通过 4 个节点足尺试件力学性能试验，包括 1 个底部 L 型现浇边节 点试件，1 个底部 L 型装配边节点试件，1 个顶部 L 型装配节点试件和 1 个底部 T 型装配节点试件，以此来验证“U 型套箍插 筋”连接技术的有效性. 试验得到了节点足尺试件的开裂荷载、裂缝发展规律、承载能力、破坏方式、构件延性等力学性能. 试验结果表明：新型装配式管廊节点试件都在靠近角点区域发生弯剪破坏，具有较高的承载力和延性；采用“U 型套箍插筋” 连接性能可靠，能够获得与现浇节点试件相当的力学性能. 关键词    装配式综合管廊；U 型套箍插筋连接；节点足尺试验；破坏形态；承载力；延性 分类号    TU990.3 Experimental  study  of  mechanical  properties  of  joints  in  a  new-type  prefabricated double cabin utility tunnel KUANG Ya-chuan1) 苣 ，JIANG Li-yang1) ，LIU Yin-hu2) ，MO Xiao-fei3) ，FU Liang-ming2) ，LUO Shi-quan2) 1) School of Civil Engineering, Central South University, Changsha 410075, China 2) Power China Zhongnan Engineering Corporation Limited, Changsha 410014, China 3) Jinke Property Group Co., Ltd., Chongqing 400000, China 苣 Corresponding author, E-mail: kuangyachuan@csu.edu.cn ABSTRACT    Modernization  of  urban  infrastructure  is  the  premise  for  improving  urban  operation  efficiency.  The  traditional  direct burying method of the municipal public pipeline requires repeated excavation for maintenance, which seriously affects the traffic and appearance of the city and interferes with the everyday life and work order of residents. With the rapid development of urbanization recently, the city’s underground utility tunnel appears at a historical juncture. To cope with the industry’s urgent need for efficient and green  construction  technology,  China  is  strongly  promoting  urban  utility  tunnels  and  its  development  toward  prefabrication.  The prefabricated utility tunnel efficiently uses the urban underground space, intensively manages various municipal pipelines, and solves the “ zipper  road” problem;  it  also  has  the  advantages  of  increased  production  efficiency  in  a  short  construction  period  and  green environmental protection. The joint is the weakest link of the structure in a prefabricated utility tunnel, and its mechanical properties directly affect the deformation and bearing capacity of the entire structure. A new type of prefabricated double cabin utility tunnel with a “ U-shaped  ferrule  joint  bars  connection” was  proposed.  The  validity  of  the  method  was  confirmed  through  testing  the  mechanical properties of four full-scale joints, including one bottom L-shaped cast-in-place side joint, one bottom L-shaped assembly side joint, one top L-shaped assembly joint, and one bottom T-shaped assembly joint specimen. The result obtained the mechanical properties of the joint  full-scale  specimen,  such  as  cracking  load,  crack  development  law,  bearing  capacity,  failure  mode,  and  member  ductility. 收稿日期: 2021−03−07 基金项目: 国家自然科学基金资助项目（51878663）；中南电力建设股份有限公司科技项目 工程科学学报，第 43 卷，第 11 期：1522−1533，2021 年 11 月 Chinese Journal of Engineering, Vol. 43, No. 11: 1522−1533, November 2021 https://doi.org/10.13374/j.issn2095-9389.2021.03.07.002; http://cje.ustb.edu.cn