短时超大吊装动力荷载作用下盾构工作井结构响应  

Structural Response of Shield Working Shaft Under the Action of Short-Term and Super-Heavy Hoisting Dynamic Load

作　　者：杨帆 刘燕[2,3] 马文彬 YANG Fan;LIU Yan;MA Wenbin(China Railway 14th Bureau Group Co.Ltd.,Jinan Shandong 250014,China;School of Civil Engineering and Architecture,University of Jinan,Jinan Shandong 250022,China;The Engineering Technology Research Center for Urban Underground Engineering Supporting and Risk Monitoring of Shandong Province,Jinan Shandong 250022,China)

机构地区：[1]中铁十四局集团有限公司,山东济南250014 [2]济南大学土木建筑学院,山东济南250022 [3]山东省城市地下工程支护及风险监控工程技术研究中心,山东济南250022

出　　处：《铁道建筑技术》2023年第10期162-166,共5页Railway Construction Technology

基　　金：中铁十四局集团有限公司科技研发计划项目(2019-c29)。

摘　　要：本文依托济南市穿黄隧道南岸盾构超深工作井,针对盾构机出井吊装过程,构建短时荷载模型,通过数值分析结合现场实测数据研究超大、短时荷载作用对超深工作井结构体系的影响。结果表明:超大短时荷载存在一定的动力特性,在荷载作用结束后主体结构变形及内力响应均出现“回弹”现象;吊装荷载对变形主要影响深度在洞门以上范围,随深度增加,墙体横向、竖向应力变化增量差值逐渐减小,表明吊装荷载影响有限;环框梁结构的存在能够明显约束主体结构变形。In this paper,relying on the shield ultra-deep working shaft on the south bank of the Yellow Crossing Tunnel in Jinan City as the engineering background,the short-term load model of the working shaft was established according to the process of lifting the shield machine out of the ultra-deep and large working shaft,and the influence of ultra-large and short-term loading on the structural system of ultra-deep working shaft was studied by combining numerical analysis with field measured data.The results show that there are certain dynamic characteristics of hoisting short-term and super-heavy loads.After the end of the load,the deformation of the main structure and the internal force response will appear“rebound”ꎻthe main influence depth of lifting load on deformation is in the range above the cavity door,and the incremental difference of transverse and vertical stress changes in the wall gradually decreases with the increase of depth,indicating that the influence of lifting load is limited.The existence of the ring-frame beam structure can obviously restrain the deformation of the main structure.

关 键 词：短时荷载 工作井结构响应 数值模拟 现场监测数据分析 

分 类 号：U455.8[建筑科学—桥梁与隧道工程]