防灾减灾工程学报2013，Vol.33Issue(1)：73-77,107,6.
隧道衬砌空洞积水的探地雷达识别研究
Study of Ground Penetrating Radar Detecting on Tunnel Lining Cavity with Water
摘要
Abstract
Lining cavities are common diseases in operating tunnel. Because of its complex medium inside, especially water filling, there are always difficulty and error in ground penetrating radar (GPR) detecting. Firstly, the numerical model of cavity and cavity water with different conductivities is established using MATLAB programming. Then GPR forward simulation is carried out with 2D finite difference time domain (FDTD) method. Through analyzing forward simulation map and its single trace, the response character of cavity and water is summed up. Appling GPR on detecting tunnel lining model, comparison is made between the test result and the forward simulation one. It is shown that the model test result is similar to FDTD forward simulation. The reflected wave phase of cavity is opposite to incidence wave. But phase of cavity water is the same as incidence wave. Furthermore, reflect wave of water is more obvious. Electromagnetic wave attenuation in water is too fast to identify the size of cavity.关键词
隧道工程/衬砌空洞/探地雷达(GPR)/时域有限差分法(FDTD)/模型试验Key words
tunnel engineering/cavity water/ground panetrating radar (GPR)/finite difference time domain method(FDTD)/model test分类
交通工程引用本文复制引用
李兴,朱彤,周晶..隧道衬砌空洞积水的探地雷达识别研究[J].防灾减灾工程学报,2013,33(1):73-77,107,6.
