新型装配式格栅筏板基础受力性能  

Mechanical Behavior of the Foundation of the New Assembled Grille Raft

作　　者：范亚斌 殷建刚 熊川羽 周林涛 柴明 王晖 胡导福 FAN Yabin;YIN Jiangang;XIONG Chuanyu;ZHOU Lintao;CHAI Ming;WANG Hui;HU Daofu(State Grid Economic and Technical Research Institute Co.LTD.,Beijing 102209,China;State Grid Hubei Electric Power Co.LTD.,Wuhan 430077,China)

机构地区：[1]国网经济技术研究院有限公司,北京102209 [2]国网湖北省电力有限公司,武汉430077

出　　处：《科技和产业》2024年第22期348-357,共10页Science Technology and Industry

基　　金：国家电网有限公司总部管理科技项目资助(5200-202222082A-1-1-ZN)。

摘　　要：目前110 kV变电站主变压器基础多采用现浇式混凝土基础,现浇混凝土基础具有工序多、施工复杂、施工周期长、施工质量不易保证等问题。针对现浇式主变基础存在的上述问题,同时根据110 kV主变基础的受力情况和现场安装的要求,提出了一种新型的装配式正交斜放格栅筏板基础可有效地规避现浇式基础的上述缺陷。首先采用有限单元分析法建立精细化模型对装配式格栅筏板基础连接节点受力性能的影响因素进行了多方面的研究,在综合比较分析的基础上提出了装配式格栅筏板基础节点的连接方式和构造措施;其次制作模型,采用室内试验的方法对装配式格栅筏板基础连接节点的受弯性能和受剪性能进行了试验研究,并与有限元计算结果进行了对比分析。结果表明,装配式格栅筏板基础连接节点的承载力具有较高的安全储备,验证了本文建议连接形式的可行性和受力性能的可靠性。研究成果不仅可满足110 kV主变压器对基础的设计要求,还可进一步在其他构筑物基础中推广应用。At present,the main transformer foundation of 110 kV substation mostly adopts cast-in-place concrete foundation,which has many problems,such as many processes,complex construction,long construction period and difficult to guarantee construction quality.In view of the above problems existing in cast-in-place main transformer foundation,and according to the stress condition of 110 kV main transformer foundation and the requirements of installation on-site,a new type of assembled orthogonal diagonal grid raft foundation is proposed,which can effectively avoid the above defects of cast-in-place main transformer foundation.Firstly,the finite element analysis method was used to establish a refined model to study the factors affecting the mechanical performance of the connection joints of the fabricated grid raft foundation.Based on the comprehensive comparative analysis,the connection mode and structural measures of the connection joints of the fabricated grid raft foundation were proposed;Secondly,the model was made,and the flexural and shear properties of the connection joints of the fabricated grid raft foundation were studied by using the indoor test method,and the results were compared with the finite element calculation results.The results show that the bearing capacity of the prefabricated grid raft foundation connection mode has a high safety reserve,which verifies the feasibility of the connection mode proposed in this paper and the reliability of the mechanical performance.The research results can not only meet the design requirements of 110 kV main transformer for foundation,but also be further applied in other structure foundations.

关 键 词：新型装配式基础 格栅筏板 受力性能 有限元分析 试验研究 

分 类 号：TU476[建筑科学—结构工程]