摘要
为研究不同噪声源分布下微动台阵的探测效果,采用现场试验和数值分析两种方法进行分析。现场试验即对比在场地附近有无明显噪声源的情况下,不同台阵的探测效果;数值分析即模拟不同噪声源分布情况,并对比在这些情况下,不同台阵的探测效果。结果表明:对于圆形台阵和三角形台阵,即使场地附近有明显噪声源,也可以提取较为准确的频散曲线;对于十字形台阵,当场地附近没有明显噪声源时,提取的频散曲线较为准确,当场地附近有明显噪声源时,十字形台阵的勘探结果会受到一定影响;对于直线形台阵,不同的台阵走向可能会导致不同的勘探结果产出。因此,不同噪声源分布对微动探测效果影响显著,开展勘探时应根据噪声源分布特征优选圆形台阵或三角形台阵,视情况采用十字形台阵,谨慎使用直线形台阵。
This study performs both field tests and numerical simulations to investigate the detection effect of microtremor arrays under different noise source distributions.Field tests are conducted to compare the detection effects of different arrays in the presence and absence of obvious noise sources.A numerical analysis is conducted to simulate the different noise source distribution conditions and evaluate the corresponding detection effects of the different arrays.The results indicate the following observations:(1)for the circular and triangular arrays,accurate dispersion curves can be extracted,even when obvious noise sources exist near the site,earning these arrays priority in microtremor surveys;(2)for the cross-shaped arrays,accurate dispersion curves can be obtained in the absence of obvious noise sources;however,their results are affected when there are noise sources;therefore,the usage of the cross-shaped arrays must be determined based on the ambient noise conditions and the surface characteristics around the site;and(3)for the linear arrays,different orientations may lead to varying exploration results;hence,they must be used with caution in microtremor surveys.In conclusion,different noise source distributions have significant effects on the microtremor exploration results;thus,the appropriate array types must be selected according to the noise source distribution.It is suggested that circular and triangular arrays must be prioritized;cross-shaped arrays must be utilized depending on the situation;and linear arrays must be used cautiously.
作者
李传金
丁浩东
渐翔
郑涛
王强
LI Chuanjin;DING Haodong;JIAN Xiang;ZHENG Tao;WANG Qiang(School of Civil Engineering,Fujian University of Technology,Fuzhou 350118,Fujian,China;Institute of Geotechnical Engineering,Fujian University of Technology,Fuzhou 350118,Fujian,China;Huainan City Land and Resources Law Enforcement Supervision Detachment,Huainan Municipal Bureau of Natural Resources and Planning,Huainan 232001,Anhui,China;Niushan Holdings Group Co.,Ltd.,Tongling 244131,Anhui,China)
出处
《地震工程学报》
北大核心
2026年第1期177-186,共10页
China Earthquake Engineering Journal
基金
中国科学院重点部署项目(ZDRW-ZS-2021-3-1)
福建省自然科学基金项目(2023J01939)
福建省自然科学基金项目(2021J011057)。
关键词
微动勘探
频散曲线
台阵
噪声源分布
microtremor survey
dispersion curve
array
noise source distribution
