Ezperiment on Artificial Frozen Soil Boundary GPR Detection During Cross-passage Construction in Tunnels
Based on analyzing disadvantage of routine estimate for artificial frozen soil boundary and comparing the dielectric properties differences between artificial frozen and natural soil,experiment on estimating the boundary using Ground Penetrating Radar was discussed for the cross-passage construction of Shanghai East Fuxing road tunnel. For knowing about the amplitude and phase features of GPR reflection of frozen soil boundary,forward modeling was also developed. Despite much EM disturbance the boundary reflection could be obtained from GPR profile by optimizing the data collection mode and selecting appropriate filtering method. By tracing inphase reflections the boundary could be estimated from GPR profile. Experimental results show that estimated boundary using GPR is consistent with the temperature field distribution deduced from temperature-supervising data. GPR can be used for detecting frozen soil boundary during cross passage construction in tunnel, and also it can make up for the limitation of temperature-supervising method,such as the less temperature-supervising holes and temperature data lost due to sensor damage during construction.
Yong-Hui Zhao Xiang-Dong Hu Guo-Qiang Zhao
Tongji University,China Shanghai No.2 Municipal Engineering Co.,China
国际会议
Progress in Electromagnetics Research Symposium 2005(2005年电磁学研究新进展学术研讨会)(PIERS 2005)
杭州
英文
354-358
2005-08-22（万方平台首次上网日期，不代表论文的发表时间）