摘要
隧道衬砌内部结构复杂且钢筋网密布给探测工作带来了极大的挑战,探地雷达无损检测技术为隧道衬砌病害的发现提供重要依据,对病害治理工作提供重要帮助。为了充分掌握隧道衬砌病害的状况,设计并制作了带有钢筋网的隧道衬砌空洞病害的物理模型,并将实测数据用RADAN 7软件处理后生成二维和三维图像;使用有限元法(FEM)建立等比例(1∶1)的地电模型,并用Matlab软件进行正演模拟。试验结果表明:通过对雷达数据进行二维和三维的分析研究,可以准确地推断或计算出病害的方位、形状、埋深等;衬砌结构内的钢筋电导率过大,空洞病害的信号特征在钢筋间距不同时会受到不同程度的干扰。钢筋作为衬砌结构必不可少的组成,在施工过程中应十分重视,尽量减少隧道运营中的生命和财产损失。
The complex internal structure of the tunnel lining and the dense⁃covered rebar mesh have brought great challenges to the detection.The ground penetrating radar(GPR)non⁃destructive testing technology provides an important basis for the discovery of tunnel lining diseases and provides important help for the disease treatment.In order to fully grasp the condition of the tunnel lining diseases,a physical model of the tunnel lining cavity disease with rebar mesh is designed and made,and the measured data is processed by RADAN 7 to generate 2D and 3D images.The finite element method(FEM)is used to establish geoelectric model with equal proportion(1∶1),and the Matlab is used for the forward simulation.The test results show that,the position,shape and depth of the disease can be accurately inferred or calculated by the 2D and 3D analysis of radar data,the electrical conductivity of the rebar in the lining structure is too large,and the signal feature of the cavity disease will be interfered to different degrees when the rebar spacing is different.As an indispensable component of the lining structure,rebars should be paid attention to during the construction process to reduce the loss of life and property as much as possible during tunnel operation.
作者
舒志乐
胥晏
黄强
朱思宇
SHU Zhile;XU Yan;HUANG Qiang;ZHU Siyu(Institute of Geotechnical Engineering,College of Civil Architecture and Environment,Xihua University,Chengdu 610039,China;Chengdu Branch of Beijing Architectural Design and Research Institute Co.,Ltd.,Chengdu 610017,China)
出处
《现代电子技术》
2022年第11期18-23,共6页
Modern Electronics Technique
基金
国家自然科学基金项目(51608450)。
