- 责任者：Yang Tianchun (College of Civil Engineering ; Hunan University of Science and Technology ; Xiangtan 411201 ; China) ; Feng Jianxin
- 刊名：Geophysical and Geochemical Exploration
- 出版年：2011
- 卷期：35(2)
- 关键词：地质雷达 ; geological radar ; 岩溶环境 ; karst environment ; 工程地质勘察 ; engineering geological investigation ; 湖南 ; Hunan Province
- 页码：p.280-284
- 图表：7 illus., 7 refs.
- 分类号：1600
- issnNo：ISSN1000-8918
- isbnNo：CN11-1906/P
In this paper, the application of GPR to vertical karst caves was introduced in Zhangjiajie-Huayuan Expressway of Hunan Province, and the effectiveness of the complex signal analysis was illuminated in GPR data processing. The authors first processed the GPR data by two-dimensional spatial filter, and then applied Hilbert transform to the data, thus obtaining the transient amplitude, transient phase and transient frequency. Finally, the authors analyzed the processed data synthetically. The results show that the spatial filter can remarkably eliminate high frequency noise and improve SNR of the signal. In addition, the accuracy of the GPR interpretation can be improved by the multi-parameter analytical method. Drilling results prove the correctness of the inversion interpretation.oft-com:office:office" />