隆尧地裂缝调查中的物探关键技术
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摘要
针对华北平原地裂缝的调查工作已有多年,而隆尧地裂缝发育规模大、灾害程度严重。为剖析其所在地层的结构,揭示其成生发展的主控因素,研究对其有最优响应特征的物探关键技术,在有地裂缝出露的东店马村开展了可控震源地震法、α杯累积测氡法、电磁波探地雷达法、多道瞬态瑞利面波法。优选出前三种调查隆尧地裂缝的物探关键技术。此类以关键技术组合为主的综合物探手段,为研究隆尧地裂缝成因机制提供了确凿的地球物理论证资料和科学依据。
Ground fissures are extensively developed in Longyao area,and cause serious geohazard. Based on previous ground fissure investigation which has lasted for many years in the North China Plain and aimed at analyzing the structure of the existing ground fissures and revealing the factors controlling the development of ground fissures,the authors employed geophysical technologies to conduct ground fissure survey in Dongdianma Village where the ground fissures are exposed. The vibraseis method,α-cup cumulative radon detection method,geological radar method and multi-channel transient Rayleigh wave method were utilized to perform the investigation,and the good exploration results show that the first three geophysical methods have the optimal response characteristics and hence are the key technologies to investigate Longyao ground fissures. The integrated geophysical method based on these key technologies provides not only conclusive geophysical data but also scientific basis for the mechanism of Longyao ground fissures.
引文
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