软土地基桥梁基坑支护结构变形监测研究  

Study on Deformation Monitoring of Foundation Pit Supporting Structure of Soft Soil Foundation Bridge

作　　者：杜琰 Du Yan(China Building Materials Industrial Geological Exploration Center Henan Corps,Xinyang,Henan 464000)

机构地区：[1]中国建筑材料工业地质勘查中心河南总队,河南信阳464000

出　　处：《江西建材》2024年第8期108-109,118,共3页

摘　　要：为分析软土地基桥梁基坑支护结构的变形特性,文中以某单跨钢箱梁悬索桥为例,对桥梁基坑支护结构水平位移、沉降量、支撑轴力的演变规律进行监测。结果表明,基坑工程最大水平位移达到22.6 mm;累计的沉降量为5.4 mm;随着基坑工程施工的持续推进,所有监测点位的基坑工程支撑轴力整体呈现出稳定后增加的变化规律。所有监测点最大的支撑应力分别为126、108、125、109、83 MPa,所有监测数据均小于设计要求值150 MPa,表明本支护结构方案安全可靠。In order to analyze the deformation characteristics of foundation pit support structure of soft soil foundation bridge,this paper takes a single span steel box girder suspension bridge as an example to monitor the evolution of horizontal displacement,settlement and supporting axial force of the foundation pit support structure of bridge.The results show that the maximum horizontal displacement of foundation pit is 22.6mm.The accumulated settling amount is 5.4 mm;With the continuous advancement of foundation pit construction,the supporting axial force of foundation pit engineering at all monitoring points is stable first and then increasing.The maximum support stress of all monitoring points is 126,108,125,109 and 83 MPa respectively,and all monitoring data are less than the design requirements 150 MPa,indicating that the support structure scheme has effective safety and reliability.

关 键 词：软土地基 桥梁基础 水平位移 轴力 

分 类 号：U445.55[建筑科学—桥梁与隧道工程]