隧道结构3D打印修复混凝土特性试验研究  

Experimental Study on Characteristics of 3D Printing Repair Concrete for Tunnel Structures

作　　者：袁勇[1,2] 陶亚欣 姚旭朋[1,2] 张友华 荣耀 孙洋 YUAN Yong;TAO Yaxin;YAO Xupeng;ZHANG Youhua;RONG Yao;SUN Yang(Tongji University,Shanghai 200092,China;National Engineering Technology Research Center for Prefabrication Construction in Civil Engineering,Shanghai 200092,China;Jiangxi Transportation Investment Group Project Construction Management Company,Nanchang 330200,Jiangxi,China;Jiangxi Transportation Institute Co.,Ltd.,Nanchang 330200,Jiangxi,China;Ghent University,Ghent 9000,Netherlands)

机构地区：[1]同济大学,上海200092 [2]同济大学国家土建结构预制装配化工程技术研究中心,上海200092 [3]江西省交通投资集团项目建设管理公司,江西南昌330200 [4]江西省交通科学研究院有限公司,江西南昌330200 [5]根特大学,根特9000

出　　处：《建筑施工》2024年第10期1588-1591,共4页Building Construction

基　　金：上海市科学技术委员会科研项目课题(21DZ1203505);江西省交通运输厅科技项目(2021C0008)。

摘　　要：基于3D打印的隧道结构修复技术是应对隧道结构修复需求快速增长的技术途径之一,在当前城市化进程中,特别是对于地铁隧道来说,修复技术的研究和应用显得尤为重要。在对地铁隧道结构修复需求分析的基础上开展掺生物炭的3D打印混凝土特性试验,探究了掺有生物炭的3D打印混凝土的特性。全面研究了不同剂量生物炭条件下3D打印混凝土的水化性能、流动性和可泵性,以及在不同龄期的力学表现和收缩性能,并评估了其对3D打印混凝土可建造性的潜在影响。试验结果表明生物炭的加入会显著改变3D打印混凝土的性能,这为3D打印混凝土在隧道结构修复技术中的应用提供了科学依据。3D printing-based tunnel structure repair technology is a key approach to addressing the rapidly growing demand for tunnel repairs.In the context of current urbanization,particularly for subway tunnels,the research and application of repair technologies are crucial.Based on the analysis of subway tunnel repair demands,an experimental study is conducted on the characteristics of 3D printing concrete mixed with biochar.The study comprehensively investigated the hydration performance,flowability,and pumpability of 3D printed concrete with varying doses of biochar,as well as its mechanical performance and shrinkage at different ages.The potential impact on the constructability of 3D printed concrete is also evaluated.Experimental results indicate that the addition of biochar significantly alters the performance of 3D printed concrete,providing a scientific basis for its application in tunnel structure repair technology.

关 键 词：3D打印混凝土 隧道结构修复 生物炭 水化性能 可建造性 

分 类 号：TU528[建筑科学—建筑技术科学]