隧道顶板盘扣式钢管支架随立杆顶升轴力变化试验研究  

Experimental Study on the Variation of Tunnel Roof Plate Buckle Steel Pipe Support with Vertical Rod Lifting Axial Force

作　　者：倪毅 邵泉 张厚美 黄桂明 蒋永新 NI Yi;SHAO Quan;ZHANG Hou-mei;HUANG Gui-ming;JIANG Yong-xin(Guangzhou Construction Co.,Ltd,Guangzhou 510006;Guangzhou Municipal Construction Croup Co.,Ltd.,Guangzhou 510006;Guangzhou Hengsheng Construction Group Co.,Ltd,Guangzhou 510006)

机构地区：[1]广州建筑股份有限公司,广州510006 [2]广州市建筑集团有限公司,广州510006 [3]广州市恒盛建设集团有限公司,广州510006

出　　处：《广州建筑》2024年第4期27-31,共5页GUANGZHOU ARCHITECTURE

基　　金：广州市建筑集团有限公司科技计划项目(2023-KJ026)。

摘　　要：近年来盘扣式钢管支架在隧道顶板施工中的应用越来越广泛,常规方式安装轴力监测器时,监测人员无法准确判断监测器与主龙骨之间是否存在虚位,导致相邻立杆轴力值差异较大,轴力监测精度不足。本文提出随着混凝土浇筑提升立杆调节对应的轴力值。通过实际监测案例,取得盘扣式钢管支架监测立杆顶升过程中对应轴力值的变化,并与立杆理论计算轴力值进行对比,探究盘扣式钢管立杆轴力监测方法。研究结果表明:(1)与常规的监测方法相比,本文提出通过顶升立杆主动调节对应立杆轴力值,能够实现主动控制各个立杆轴力实际受力情况。(2)实际轴力监测值小于根据荷载理论立杆轴力理论计算值,验证了架体实际轴力监测值偏安全。(3)立杆顶升H值与立杆轴力增加值FX之间存在线性关系。研究结果对常规高支模监测和施工具有参考价值。In recent years,the disc buckle steel pipe supportis more and more widely used intunnel roof construction.whenthe axial force monitor is installed in the conventional way,the monitors can not accurately judge whether there is a void between the monitor and the main keel,resulting in a great difference in the axial force value of the adjacent vertical rods and the lack of axial force monitoring accuracy.In this paper,itis proposed that the corresponding axial force value should be adjusted with the concrete pouring.Through the actual monitoring case,the change of the corresponding axial force value in the monitoring vertical rod lifting process of the disc buckle steel pipe support is obtained,and compared with the axial force value calculated by the vertical rod theory,the axial force monitoring method of the disc buckle steel pipe vertical rod is explored.The results show that:(1)compared with the conventional monitoring methods,this paper proposes that the actual force of each vertical bar can be actively controlled by actively adjusting the corresponding vertical rod axial force value.(2)according to the load theory,the calculated value of the axial force of the vertical rod is basically consistent with the actual axial force monitoring value,which verifies that the actual axial force monitoring value of the frame is safe.(3)there is a linear relationship between the lifting H value of the vertical rod and the axial force increment value FX of the vertical rod.The research results are of reference value for conventional high-supported formworkmonitoring and construction.

关 键 词：承插型盘扣式钢管 高大模板支撑体系 立杆理论值验算 立杆顶升 

分 类 号：TU7[建筑科学—建筑技术科学]