长风路下穿扬溧高速中箱涵的数值模拟与实测数值的对比

COMPARISON BETWEEN NUMERICAL SIMULATION AND MEASURED VALUE OF BOX CULVERT UNDER CHANGFENG ROAD PASSING THROUGH YANGLI EXPRESSWAY

国内外绝大多数箱涵顶推施工监测的内容均是监测箱涵的水平沉降位移和高速路面的沉降变形,有关箱涵应变监测的相关研究几乎没有。以镇江市长风路下穿扬溧高速公路项目为依托,深入研究在箱涵顶推全过程中,箱体的应变情况。首先介绍现场应变监测研究的全过程,从仪器选择、仪器安装到获取监测数据、数据处理分析、得到相关结论,然后采用MIDAS/NX有限元软件对箱涵顶推工程实例进行施工全过程的数值模拟,并与现场监测数据拟合进行总结分析,该方法对施工过程中箱涵的应变实测数据进行了验证,具有较高的计算精度。研究结果对以后有关箱涵顶推的施工技术与应变监测具有重要的意义。

Most of the box culvert top push monitoring in China and other foreign countries is the horizontal settlement displacement monitoring and highway settlement deformation monitoring of box culverts,with almost no research on the strain monitoring of box culverts.Based on the project of Yangli Expressway under Changfeng Road in Zhenjiang City,the paper deeply studied the strain during the top of box culvert.The paper introduces the whole process of field strain monitoring research,including instrument selection,instrument installation,obtaining monitoring data,data processing and analysis,and obtaining relative conclusion.Midas/NX finite element software is used to simulate the whole construction process of the case of box culvert jacking project,and the fitting with the field monitoring data is summarized and analyzed.The method is verified by the measured strain data of box culvert during construction,and has high calculation accuracy.The results are of great significance to the construction technology and strain monitoring of box culvert jacking.