用H/V谱比法与折射微动法确定表土层参数
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摘要
表土层参数对地震场地响应有重要影响,通过H/V谱比法和折射微动(REMI)方法确定场地表土层厚度和速度结构等有实际意义。REMI方法采用常规折射地震采集设备,利用自然震动作为源,通过地震波场τ-p变换和傅立叶变换,将地震记录从时空域变换到慢度-频率域提取频散曲线,不同于主动源面波勘探,被动源面波勘探能获得更大深度的土层结构。
Soil parameters have an important impact on the response to earthquake damage,H/Vspectral ratio and the refraction microtremor(REMI)methods are of practical significance to determine soil thickness and velocity structure of the site.The REMI method acquires data by the conventional refraction seismic equipment,and makes use of ambient seismic field as the source.The transformation from the time-space domain to the slowness-frequency domain will be carried out in the REMI method to extract the dispersion curve by means of the tau-ptransform and the Fourier transform.Different from surface wave exploration of active source,the soil structure will be achieved in the greater depth by the dispersion curves inversion.
Soil parameters have an important impact on the response to earthquake damage,H/Vspectral ratio and the refraction microtremor(REMI)methods are of practical significance to determine soil thickness and velocity structure of the site.The REMI method acquires data by the conventional refraction seismic equipment,and makes use of ambient seismic field as the source.The transformation from the time-space domain to the slowness-frequency domain will be carried out in the REMI method to extract the dispersion curve by means of the tau-ptransform and the Fourier transform.Different from surface wave exploration of active source,the soil structure will be achieved in the greater depth by the dispersion curves inversion.
引文
[1]Park C B,Miller R D,Xia J.Multi-channel analysis of surface waves[J].Geophysics,1999,64:800-808.
[2]彭菲,黄玲,陈棋福,等.采用FDTD方法模拟三种简单沉积结构模型的脉动H/V响应[J].地震,2010,30(4):74-81.
[3]Arai H,Tokimatsu K.用地脉动H/V谱反演S波速度剖面[J].世界地震译丛,2006,(2):64-74.
[4]Hiroshi Arai,Kohji Tokimatsu.S-Wave Velocity Profiling by Joint Inversion of Microtremor Dis-persion Curve and Horizontal-to-Vertical(H/V)Spectrum[J].Bull Seism Soc Am,2005,95(5):1 766-1 778.
[5]董连成,陶夏新,师黎静,等.利用地脉动台阵记录反演场地浅层Vs结构[J].岩土力学,2008,29(2):553-556.
[6]Tibuleac I M,Britto J M.短周期面波的自动检测算法[J].世界地震译丛,2006,(6):32-42.
[7]郑治真.波普分析基础[M].北京:地震出版社,1979.181-206.
[8]John Louie.Faster,Better:Shear-Wave Velocity to 100Meters Depth from Refraction MicrotremorArrays[J].Bull Seism Soc Am,2001,91(2):347-364.
[9]Clayton R W,McMechan G A.Inversion of refraction data by wavefield continuation[J].Geophys-ics,1981,46:860-868.
[10]McMechan G A,Yedlin M J.Analysis of dispersive waves by wave field transformation[J].Geo-physics,1981,46:869-874.
[11]吴律.τ-p变换及应用[M].北京:石油工业出版社,1993.1-20.
[12]Thorson J R,Claerbout J F.Velocity-stack and slant-stack stochastic inversion[J].Geophysics,1985,50:2 727-2741.
[13]Coccia S,Del Gaudio V.Application of Refraction Microtremor(ReMi)technique for determinationof 1-D shear wave velocity in a landslide area,Journal of Applied[J].Geophysics,2010,71:71-89.
[14]Park C B,Miller R D,Xia J.Imaging dispersion curves of surface waves on multichannel record in68th Annual International Soc[J].1998,9:1 377-1 380.
[15]Yamanaka H,Ishida H.Application of genetic algorithms to an inversion of surface-wave dispersiondata[J].Bull Seism Soc Am,1996,86(2):436-444.
[2]彭菲,黄玲,陈棋福,等.采用FDTD方法模拟三种简单沉积结构模型的脉动H/V响应[J].地震,2010,30(4):74-81.
[3]Arai H,Tokimatsu K.用地脉动H/V谱反演S波速度剖面[J].世界地震译丛,2006,(2):64-74.
[4]Hiroshi Arai,Kohji Tokimatsu.S-Wave Velocity Profiling by Joint Inversion of Microtremor Dis-persion Curve and Horizontal-to-Vertical(H/V)Spectrum[J].Bull Seism Soc Am,2005,95(5):1 766-1 778.
[5]董连成,陶夏新,师黎静,等.利用地脉动台阵记录反演场地浅层Vs结构[J].岩土力学,2008,29(2):553-556.
[6]Tibuleac I M,Britto J M.短周期面波的自动检测算法[J].世界地震译丛,2006,(6):32-42.
[7]郑治真.波普分析基础[M].北京:地震出版社,1979.181-206.
[8]John Louie.Faster,Better:Shear-Wave Velocity to 100Meters Depth from Refraction MicrotremorArrays[J].Bull Seism Soc Am,2001,91(2):347-364.
[9]Clayton R W,McMechan G A.Inversion of refraction data by wavefield continuation[J].Geophys-ics,1981,46:860-868.
[10]McMechan G A,Yedlin M J.Analysis of dispersive waves by wave field transformation[J].Geo-physics,1981,46:869-874.
[11]吴律.τ-p变换及应用[M].北京:石油工业出版社,1993.1-20.
[12]Thorson J R,Claerbout J F.Velocity-stack and slant-stack stochastic inversion[J].Geophysics,1985,50:2 727-2741.
[13]Coccia S,Del Gaudio V.Application of Refraction Microtremor(ReMi)technique for determinationof 1-D shear wave velocity in a landslide area,Journal of Applied[J].Geophysics,2010,71:71-89.
[14]Park C B,Miller R D,Xia J.Imaging dispersion curves of surface waves on multichannel record in68th Annual International Soc[J].1998,9:1 377-1 380.
[15]Yamanaka H,Ishida H.Application of genetic algorithms to an inversion of surface-wave dispersiondata[J].Bull Seism Soc Am,1996,86(2):436-444.
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