基于GPR的筏板基础底面脱空区探测研究  

Research on the Detection of the Goaf on the Bottom of Raft Foundation Based on GPR

作　　者：陈秋彤 CHEN Qiutong(JSTI Group Co.,Ltd,Nanjing Jiangsu 210008 China)

机构地区：[1]苏交科集团股份有限公司,江苏南京210008

出　　处：《江苏建筑》2024年第4期120-123,144,共5页Jiangsu Construction

摘　　要：筏板基础底面脱空往往会影响建筑物的正常使用,探地雷达技术可以及时查明并作出修复。通过建立不同介质脱空模型设计相关的模型试验,针对探地雷达实测的结果采用RIS-K2软件来提取其单道波形图解译脱空区的信息,求取脱空深度并分析不同介质脱空的区别;基于FDTD的探地雷达电磁波数值模拟与MATLAB成像技术研究,对模型试验的各种情形进行正演模拟,同样通过提取单道波的方法对脱空区进行解析研究,与模型试验对比分析,验证该方法的可行性。进而总结得出通过提取并解译雷达单道波形图的方法可以对脱空区情形进行量化分析,具有较大的实际工作价值。The bottom surface of the raft foundation is often out of the normal use of the building,and the ground penetrating radar technology can be used to find and repair in time.By establishing model experiments related to the design of the model of different media out of the air,the RIS-K2 software is used to extract the single channel waveform to interpret the information of the out of the air area according to the actual results of the ground penetrating radar,to obtain the depth of the out of the air and analyze the differences of the different media out of the air.Secondly,the numerical simulation of the ground penetrating radar electromagnetic wave based on FDTD and the research of MATLAB imaging technology are carried out for the forward simulation of various situations of the model test.The method of extracting the single-channel wave is also used to analyze the out of the air area,and the comparative analysis is carried out with the model test to verify the feasibility of the method.It is concluded that the method of extracting and interpreting the radar single channel waveform can quantitatively analyze the situation of the out of the air area,which has great practical value.

关 键 词：筏板脱空 探地雷达 FDTD 模型试验 正演模拟 

分 类 号：TU471.15[建筑科学—结构工程] P631.325[建筑科学—土工工程]