新型装配式钢箱混凝土组合沉井结构整体受力性能试验研究  

Experimental Research on Mechanical Properties of a New Prefabricated Concrete-Filled Composite Steel Box Caisson Structure

作　　者：林彦[1,2] 刘以政 林庆伟 仲崇廷[4] 宋健凯 LIN Yan;LIU Yizheng;LIN Qingwei;ZHONG Chongting;SONG Jiankai(School of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China;Key Laboratory of Building Structural Retrofitting and Underground Space Engineering(Shandong Jianzhu University),Ministry of Education,Jinan 250101,China;Shandong Jianzhu University Design Group Co.,Ltd.,Jinan 250013,China;Design and Research Institute of the Second Company of China Construction Eighth Bureau,Jinan 250014,China)

机构地区：[1]山东建筑大学土木工程学院,济南250101 [2]建筑结构加固改造与地下空间工程教育部重点实验室(山东建筑大学),济南250101 [3]山东建筑大学设计集团有限公司,济南250013 [4]中建八局二公司设计研究院,济南250014

出　　处：《工业建筑》2023年第1期201-206,共6页Industrial Construction

基　　金：新型建筑墙体材料基金绿色建筑与建筑产业现代化科研项目;教育部科研创新团队支持计划(IRT13075);山东建筑大学博士基金资助(2016);住房城乡建设部科学技术项目(2019-k-073)。

摘　　要：提出一种新型的装配式钢箱混凝土组合沉井结构。为研究该沉井结构在水土压力作用下的整体受力性能,依托于大洋泊车地下车库工程,设计了1个足尺试件,对其进行水平加载试验研究,分析当沉井结构下沉至设计标高且未封底板时,在水平荷载作用下的变形和应力分布特点,进而对沉井结构的承载能力和安全性进行评估。试验结果表明:沉井结构在1.1倍水平设计荷载作用下,井壁的最大变形约为井壁长度的1/1 000,各点应力均小于材料屈服强度,沉井具有较大的刚度和较高的承载力;沉井内的撑杆和围檩可有效改善井壁的应力分布,增强沉井结构的整体受力性能;沉井满足安全和使用要求,是一种较为合理的结构形式。A new type of prefabricated concrete-filled steel box composite caisson structure was proposed.In order to study mechanical properties of the caisson structure under the water and soil pressure,a full-scale test structure was designed based on the Dayang Parking underground garage project.A static loading test for the structure was conducted to analyze deformation and stress characteristics of the caisson structure under horizontal loads when it was sunk to the design elevation and the baseplate was not sealed,and then the bearing capacity and safety of the caisson structure was evaluated.The results showed that under the 1.1 times horizontal design load,the maximum deformation of the shaft wall for the caisson structure was about 1/1000 length of the shaft wall,and the stress at each point was less than the yield strength of the material.The caisson structure had great rigidity and the high bearing capacity.The braces and walings of the caisson could effectively improve the stress in the shaft wall and enhance the overall mechanical performances of the caisson structure.The caisson structure was a reasonable structure which could meet the requirements of safety and use.

关 键 词：装配式 钢箱-混凝土组合板 沉井结构 受力性能 试验研究 

分 类 号：TU398.9[建筑科学—结构工程]