摘要
本文使用直线型或三角型台阵在武汉后湖地区开展微动观测。利用空间自相关方法(SPAC)提取了116个观测台阵的瑞利波频散曲线。通过近邻法反演获得后湖地区浅层地下三维横波速度结构及不同速度界面的深度分布。该区域浅表速度分布非常不均匀,存在多个异常区域,不同速度界面局部洼陷和抬升明显,为下一步城市规划、建设和经济社会发展决策提供科学依据。
This study carried out microtremor observations with linear or triangular arrays in Houhu lake area of Wuhan. By the spatial autocorrelation method( SPAC),Rayleigh wave dispersion curves were extracted from 116 observation arrays. The 3D S- wave velocity structure distribution of shallow underground and various speed interfaces in Houhu lake area are inversed and inferred by the Neighbourhood Algorithm. The results reveal that the significant lateral variations for the velocity distributions in shallow area and the depth of speed interface. It provides scientific basis for further city planning,construction,economic and social development decision.
出处
《地震工程与工程振动》
CSCD
北大核心
2014年第S1期173-177,共5页
Earthquake Engineering and Engineering Dynamics
基金
中国地震局地震研究所所长基金项目(IS201216023)
关键词
微动
空间自相关
频散曲线
面波
速度
microtremor
SPAC
dispersion curve
surface wave
velocity
