THE STUDY AND APPLICATION OF THE GROUND PENETRATION RADAR TO THE FORWARD MODELING OF PERMAFROST AREA
HU Jun1, YU Qi-hao1, YOU Yan-hui1, QIAN Jin2
1. State Key Laboratory of Frozen Soil Engineering, CAREERI, CAS, Lanzhou 730000, China;
2. Sichuan Communication Surveying & Design Institute, Chengdu 610017, China
Abstract：Based on an analysis of the applied condition of Ground-Penetrating Radar in permafrost areas in combination with the forward modeling and practical examples, the authors conducted researches on the effectiveness of applying the ground penetrating radar to surveying the distribution, burial depth, storage situation of the thick layer subsurface ice and types of the permafrost in the permafrost area. The results show that remarkable difference in the permittivity exists between the thick layer subsurface ice and the surrounding geological bodies, resulting in the difference of phase characteristics, amplitudes, reflected waves and reflected wave groups of radar waves. The ground-penetrating radar is thus effective in surveying different characteristics of the thick layer subsurface ices. As for the ice-poor permafrost and ice-bearing permafrost, the ground-penetrating radar can also effectively distinguish various permafrost situations in combination with drilling exploration and some other exploration methods due to the difference existent in the storage situation and the distribution of ice crystals in the permafrost layer.
胡俊, 俞祁浩, 游艳辉, 钱进. 探地雷达在多年冻土区正演模型研究及应用[J]. 物探与化探, 2012, 36(3): 457-461.
HU Jun, YU Qi-hao, YOU Yan-hui, QIAN Jin. THE STUDY AND APPLICATION OF THE GROUND PENETRATION RADAR TO THE FORWARD MODELING OF PERMAFROST AREA. Geophysical and Geochemical Exploration, 2012, 36(3): 457-461.
[1] 周幼吾.中国冻土[M].北京:科学出版社,2000.[2] 俞祁浩,程国栋.物探技术在我国多年冻土勘测中的应用[J].冰川冻土. 2002:102-108.[3] 何乃武,俞祁浩.探地雷达在多年冻土地区工程勘测中的应用[J].路基工程, 2006,(5).[4] Wu T,Li S,Cheng G,et al.Using ground-penetrating radar to detect permafrost degradation in the northern limit of permafrost on the Tibetan Plateau[J].Cold Regions Science and Technology,2005,41(3).[5] 俞祁浩,白旸,金会军,等.应用探地雷达研究中国小兴安岭地区黑河—北安公路沿线岛状多年冻土的分布及其变化[J].冰川冻土,2008,30(3).[6] Munroe J S,Doolittle J A,Kanevskiy M Z.Application of ground-penetrating radar imagery for three-dimensional visualisation of near-surface structures in ice-rich permafrost, Barrow, Alaska[J].Permafrost and Periglacial Processes, 2007,18(4).[7] Galley R J,Trachtenberg M,Langlois A.Observations of geophysical and dielectric properties and ground penetrating radar signatures for discrimination of snow, sea ice and freshwater ice thickness[J].Cold Regions Science and Technology,2009,57(1).[8] Jorgensen A,Andreasen F.Mapping of permafrost surface using ground-penetrating radar at Kangerlussuaq Airport, western Greenland[J].Cold Regions Science and Technology, 2007,48(1).[9] 李大心.探地雷达方法与应用[M].北京:地质出版社,1994.[10] 李丽英,张立新,赵少杰,等.冻土介电常数的实验研究[J].北京师范大学学报:自然科学版,2007,43(3).
