GPR detection of several common subsurface voids inside dikes and dams

Ground-penetrating radar (GPR) technique has been used in detecting several common subsurface voids inside dikes and dams in south of China, and the results indicate that GPR can be successfully applied to uncovering termite nests inside dikes and dams, and the technique proves to be advantageous in real-time retrieval of detection data, precise positioning and effect of application being basically not affected by locality and climate, when it is compared to other available methods. GPR is also effective in detecting cracks in the sloping clay core, and proves to pose less impact on the normal operation of the detected hydraulic projects, be more efficient, and capable of retrieving more comprehensive detection data, when compared with the method of artificial observation through holes chiseled out from the ground. Also, GPR is capable of detecting ferralsol in tropical and subtropical regions to some depth, and shows high value of application in detecting some hidden troubles such as caves and settlements with low to moderate depths inside dams in karst regions. Moreover, GPR technique proves to be so capable of detecting carbonate rocks to certain depth and can yield precise results that it can be applied to analysis and discovery of leakage channels inside reservoirs in karst regions.

[1]  Katsuo Sasahara,et al.  Application of GPR to detecting and mapping cracks in rock slopes , 1995 .

[2]  Chen Hongsong,et al.  Spatio-Temporal Dynamic Change of Soil Water in Sloping Land with Different Use Modes in Red Soil Region , 2006 .

[3]  Mohamed Rashed,et al.  Ground penetrating radar investigations across the Uemachi fault, Osaka, Japan , 2003 .

[4]  G. Leucci,et al.  GPR survey to understand the stratigraphy of the Roman Ships archaeological site (Pisa, Italy) , 2003 .

[5]  Sheng Jinbao,et al.  Evaluation model of loss of life due to dam breach in China , 2007 .

[6]  Ma Yi.  The Weathering and Evolution of Soil Ferrallite Minerals in the South China , 1999 .

[7]  Jin Wu,et al.  Case Study: Application of GPR to Detection of Hidden Dangers to Underwater Hydraulic Structures , 2006 .

[8]  G. Brierley,et al.  Levee morphology and sedimentology along the lower Tuross River, south‐eastern Australia , 1999 .

[9]  Wen-Yi Chang,et al.  EVOLUTION OF SCOUR DEPTH AT CIRCULAR BRIDGE PIERS , 2004 .

[10]  N. Glasser,et al.  Sedimentological, geomorphological and dynamic context of debris-mantled glaciers, Mount Everest (Sagarmatha) region, Nepal , 2008 .

[11]  R. Kayen,et al.  Radar Structure of Earthquake-Induced, Coastal Landslides in Anchorage, Alaska , 2000 .

[12]  Bristow,et al.  Crevasse splays from the rapidly aggrading, sand‐bed, braided Niobrara River, Nebraska: effect of base‐level rise , 1999 .

[13]  T. Scullion,et al.  Road evaluation with ground penetrating radar , 2000 .

[14]  Zhao Yong.  Research and discussion on dike safety detecting technology , 2004 .

[15]  T. Wei,et al.  Distinction between termite-induced piping in dykes and that caused by physical factors, and its treatment , 2004 .

[16]  Keisuke Ushijima,et al.  IMAGING SUBSURFACE CAVITIES USING GEOELECTRIC TOMOGRAPHY AND GROUND-PENETRATING RADAR , 2005 .

[17]  Dean Goodman,et al.  Investigation of a subterranean tomb in Miyazaki, Japan , 2000 .

[18]  Sun YuRui.  Experimental survey for the effects of soil water content and soil salinity on soil electrical conductivity. , 2000 .

[19]  George A. McMechan,et al.  Application of ground-penetrating radar to investigation of near-surface fault properties in the San Francisco Bay region , 1996 .

[20]  S. Carlsten,et al.  Radar techniques for indicating internal erosion in embankment dams , 1995 .

[21]  R. Guerin,et al.  Analysis of the karst aquifer structure of the Lamalou area (Hérault, France) with ground penetrating radar , 2002 .

[22]  Sheng Chun-yong.  New technique for exploration and treatment of water resources and hydropower project in Karst region , 2005 .