江苏省地震局,江苏 南京 210014
孟科(1984—),男,工程师。主要从事抗震设防与浅层地震勘探研究。E-mail:872208271@qq.com
收稿:2023-07-19,
修回:2023-12-08,
纸质出版:2024-08-30
移动端阅览
孟科,杨浩,顾勤平等.利用微动台阵初勘目标区断裂位置及地层分布情况——以滨海区评为例[J].防灾减灾工程学报,2024,44(04):969-976.
MENG Ke,YANG Hao,GU Qinping,et al.Preliminary Survey of Fracture Location and Stratigraphic Distribution in Target Area using Microtremor Array: a Case Study of the Coastal Area Assessment[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(04):969-976.
孟科,杨浩,顾勤平等.利用微动台阵初勘目标区断裂位置及地层分布情况——以滨海区评为例[J].防灾减灾工程学报,2024,44(04):969-976. DOI: 10.13409/j.cnki.jdpme.20230719004.
MENG Ke,YANG Hao,GU Qinping,et al.Preliminary Survey of Fracture Location and Stratigraphic Distribution in Target Area using Microtremor Array: a Case Study of the Coastal Area Assessment[J].Journal of Disaster Prevention and Mitigation Engineering,2024,44(04):969-976. DOI: 10.13409/j.cnki.jdpme.20230719004.
在滨海某地震安全性评价项目中,针对目标区面积大、覆盖层厚度大、地下隐伏构造复杂等问题,采用微动勘探方法加密观测目标区,获得了界牌⁃滨淮农场断裂的空间位置、目标区三维S波速度结构;并将微动探测结果与主动源地震勘探、剪切波速测井展开对比分析。结果表明:(1)针对界牌⁃滨淮农场断裂,微动探测与主动源地震勘探两种方法所揭示的断裂特征较为一致,作为初勘成果具有较强的应用价值;(2)在100 m深度范围以内,微动探测与波速测井所获得的剪切波速度值相近,因此微动探测技术可用于场地类别的快速判定;(3)微动探测技术相比测井和主动源地震勘探,可更经济快速的探明深部地层的速度结构,为目标区地层三维建模提供拓展资料及修正依据。
In a seismic safety evaluation project in a coastal area
microtremor detection method was adopted to densely observe the target area
addressing issues such as large target area
significant thickness in overburden layers
and complex subsurface concealed structures. This approach successfully determined the spatial location of the Jiepai-Binhuai Farm Fault and the 3D S-wave velocity structure of the target area. The microtremor detection results were analyzed and compared with data from active source seismic exploration and shear wave velocity logging. The results showed that: (1) For the Jiepai-Binhuai Farm Fault
the characteristics revealed by both microtremor detection and active source seismic exploration were relatively consistent
demonstrating significant application value as preliminary exploration results; (2) Within a depth of 100 m
the shear wave velocity values obtained from microtremor detection were similar to those from wave velocity logging
indicating that microtremor detection technology is suitable for rapid site classification; (3) Compared to logging and active source seismic exploration
microtremor detection technology could ascertain the velocity structure of deep strata in a more economic and swift way
providing additional data and correction basis for 3D stratigraphic modeling of the target area.
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