The microtremor survey method is a new environmental protection geophysical exploration technology with strong anti-interference ability, large detection depth and wide application range. It has been widely used in structure, boulder, karst cave and some other fields. However, the single point data acquisition method represented by circular array is limited by the field conditions. It is difficult for this method to achieve high-efficiency and high-density data acquisition of long profile. This paper presents an efficient data acquisition technology based on linear array with multiple coverage in order to solve this problem. Based on the idea of multiple coverage observation system in seismic exploration, the dispersion curves of multiple measurement points can be obtained by setting up a linear array at one time, which greatly improves the utilization rate of single station data acquisition. The feasibility and effectiveness of the technology were studied by applying the technology to the detection of boulders along subway of Fuzhou airport. The experimental results show that the high-efficiency data acquisition technology based on linear array multiple coverage greatly improves the efficiency and density of microtremor data acquisition, effectively improves the detection accuracy and detection depth, and provides a new array layout scheme for urban complex ground environment.
陈基炜, 赵东东, 宗全兵, 张宝松, 邸兵叶, 朱红兵, 王佳龙. 基于线形台阵的高精度微动技术在城区岩性地层精细划分中的应用[J]. 物探与化探, 2021, 45(2): 536-545.
CHEN Ji-Wei, ZHAO Dong-Dong, ZONG Quan-Bing, ZHANG Bao-Song, DI Bing-Ye, ZHU Hong-bing, WANG Jia-Long. High precision microtremor technology based on linear array and its application to the fine division of lithostratigraphy. Geophysical and Geochemical Exploration, 2021, 45(2): 536-545.
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