探地雷达在斜坡震裂变形探测中的应用研究  

Application study on shatter deformation detection of slop using Ground Penetrating Radar

作　　者：冯文凯[1] 许强[1] 黄润秋[1] 赵宇[1] 肖锐铧[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都610059

出　　处：《工程勘察》2010年第2期84-89,共6页Geotechnical Investigation & Surveying

基　　金："科技减灾;重建家园"专项基金项目(DZJK-0811);国家自然科学基金青年基金项目(40802073);国家重点基础研究发展计划(973)项目(2008CB425801)

摘　　要：5.12汶川大地震造成了大量山体震裂变形,形成了众多次生潜在灾害。这类震裂变形的深部特征是控制斜坡稳定性和发展演化规律的关键。本文以探地雷达为主要手段,结合探槽开挖验证对比,选择实例震裂边坡,对震裂变形的深部特征及探地雷达图像显示特点进行了研究。研究结果认为,斜坡震裂变形破坏深度一般不超过2m,裂缝近垂直向下发育,少数微倾坡外,探地雷达反射图像显示为双曲线特征,总体构成封口状"八"字形。研究成果为快速、有效探测震裂裂缝,尤其是垂向裂缝的深部扩展特征提供了有效参考方法,同时也为防灾减灾提供了技术支撑。5.12 WenChuan earquake led to large numbers of geohazards, and formed many potential hazards. The deep characteristics of shatter deformation are the key of controlling stability and development and evolution rules. With the Ground Penetrating Radar （GPR） as main method, and combined with exploratory trench cutting and verification contrast, selecting the shatter slopes as examples, this paper researched on the deep characteristics of shatter deformation and image display features of GPR. The research results think that the depth of shatter deformation doesnt exceed 2m in general, the crack develops downward vertical and only minority dip slope outside, and reflection images of GPR show hyperbola features, and as a whole the images form sealed Chinese character eight. The study results will provide the powerful reference method to probe deep characteristics of shatter crack rapidly and effectively, especially to vertical crack. Simultaneously, it still offers powerful technique support for hazard resistant and reduction.

关 键 词：震裂变形 深部特征 探地雷达 探槽开挖 反射图像 双曲线特征 

分 类 号：P631.425[天文地球—地质矿产勘探]