从昌平井体应变、水位对地震波的响应特征求算含水层的Skempton常数
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摘要
以理想孔隙弹性介质线性孔隙弹性理论为基础,利用井含水层系统孔隙压力变化与体应变之间的数学表达式.以2004年12月26日苏门答腊MS8.7(根据中国地震台网中心目录)地震波引起的昌平地震台水位和体应变波动资料为例,分别从时间域和频率域分析了水位与体应变之间的相互关系,并计算出地震波通过含水层时引起的水位波动对体应变的响应系数,给出了一种估算Skempton常数B的方法,为求解含水层特性提供了途径.
Based on linear poroelastic theory of ideal poroelastic media,we apply the mathematic expression between pore pressure and volume strain for well-aquifer system to analyzing the observed data of water level and volume strain changes aroused by Sumatra MS8.7(determined by China Seismic Networks Center)seismic waves at Changping,Beijing,station on December 26,2004 from both time and frequency domain.The response coefficients of water level fluctuation to volume strain are also calculated when seismic waves were passing through confined aquifer.A method for estimating Skempton constant B is put forward,which provide an approach for understanding of the characteristics of aquifer.
Based on linear poroelastic theory of ideal poroelastic media,we apply the mathematic expression between pore pressure and volume strain for well-aquifer system to analyzing the observed data of water level and volume strain changes aroused by Sumatra MS8.7(determined by China Seismic Networks Center)seismic waves at Changping,Beijing,station on December 26,2004 from both time and frequency domain.The response coefficients of water level fluctuation to volume strain are also calculated when seismic waves were passing through confined aquifer.A method for estimating Skempton constant B is put forward,which provide an approach for understanding of the characteristics of aquifer.
引文
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Biot M A.1941.General theory of three-dimensional consolidation[J].J Appl Phys,12(2):155--164.
Biot MA.1955.Theory of elasticity and consolidationfor a porous anisortopic solid[J].J Appl Phys,26(2):182--185.
Biot M A.1962.Mechanics of deformation and acoustic propagationin porous media[J].J Appl Phys,33(4):1482--1498.
Bodvarsson G.1970.Confined fluids as strain meters[J].J Geophys Res,75(14):2711--2718.
Bredehoeft J D.1967.Response of well-aquifer systems to earth tides[J].J Geophys Res,72(12):3075--3087.
Bredehoeft J D,Roeloffs E A,Riley F.1986.Water wells as strain-meters at Parkfield[J].Eos,Trans,Amer GeophysUnion,67(16):242.
Brodsky E E,Roeloffs E,Woodcock D,Gall I,Manga M.2003.A mechanismfor sustained groundwater pressure chan-ges induced by distant earthquakes[J].J Geophys Res,108(B8):2390--2490.
Cooper H H,Bredehoeft J D,Papadopulos I S,Bennett R R.1965.The response of well-aquifer systems to seismicwaves[J].J Geophys Res,70(16):3915--3926.
Eaton J P,Takasaki KJ.1959.Seismological interpretation of earthquake-induced water-level fluctuations in wells[J].Bull Seism Soc Amer,49(3):227--245.
Kano Y,Yanagidani T.2006.Broadband hydroseismograms observed by closed borehole wells in the Kamioka mine,Central Japan:Response of pore pressure to seismic waves from0.05to2Hz[J].J Geophys Res,111(B03410):1--11.
Muir-Wood R,King G C P.1993.Hydrological signatures of earthquake strain[J].J Geophys Res,98(B12):22035--22068.
Nur A,Byerlee J D.1971.An exact effective stresslawfor elastic deformation of rock withfluids[J].J Geophys Res,76(26):6414--6419.
Piombo A,Martinelli G,Dragoni M.2005.Post-seismic fluid flowand Coulomb stress changes in a poroelastic medium[J].Geophy J Int,162(2):507--515.
Rice J R,Cleary MP.1976.Some basic stress diffusion solutions for fluid-saturated elastic porous media with compressi-ble constituents[J].Rev Geophys,14:227--241.
Roeloffs E,Rudnicki J W.1984.Coupled deformation-diffusion effects on water-level changes due to propagating creepevents[J].Pure Appl Geophys,122(2--4):560--582.
Roeloffs E A.1996.Persistent water-level changes caused by seismic waves;evaluation of non-poroelastic mechanisms[C]∥AGU1996fall meeting.Eos,Trans,Amer Geophys Union,77(Suppl.):228.
Rudnicki J W.1986.Slip on animpermeable fault in a fluid-saturated rock mass[G]∥Earthquake Source Mechanics,Ge-ophysical Monograph Series,87.Washington:American Geophysical Union:81--89.
Rudnicki J W.1987.Plane strain dislocationin linear elastic diffusive solids[J].ASMEJ Appl Mech,109:545--552.
Rudnicki J W.2001.Coupled deformation-diffusion effects in the mechanics of faulting and failure of geomaterials[J].ASME Appl Mech Rev,54(6):483--502.
方晓祥.1998.北京地区地震前兆观测台站场地条件研究[M].北京:地震出版社:20--21.
吴培稚,徐平,邢成起,杨明波,尹继尧,赵桂儒,赵文忠.2006.东三旗台站的GPS、体应变和水位观测[J].地震,26(3):131--135.
Biot M A.1941.General theory of three-dimensional consolidation[J].J Appl Phys,12(2):155--164.
Biot MA.1955.Theory of elasticity and consolidationfor a porous anisortopic solid[J].J Appl Phys,26(2):182--185.
Biot M A.1962.Mechanics of deformation and acoustic propagationin porous media[J].J Appl Phys,33(4):1482--1498.
Bodvarsson G.1970.Confined fluids as strain meters[J].J Geophys Res,75(14):2711--2718.
Bredehoeft J D.1967.Response of well-aquifer systems to earth tides[J].J Geophys Res,72(12):3075--3087.
Bredehoeft J D,Roeloffs E A,Riley F.1986.Water wells as strain-meters at Parkfield[J].Eos,Trans,Amer GeophysUnion,67(16):242.
Brodsky E E,Roeloffs E,Woodcock D,Gall I,Manga M.2003.A mechanismfor sustained groundwater pressure chan-ges induced by distant earthquakes[J].J Geophys Res,108(B8):2390--2490.
Cooper H H,Bredehoeft J D,Papadopulos I S,Bennett R R.1965.The response of well-aquifer systems to seismicwaves[J].J Geophys Res,70(16):3915--3926.
Eaton J P,Takasaki KJ.1959.Seismological interpretation of earthquake-induced water-level fluctuations in wells[J].Bull Seism Soc Amer,49(3):227--245.
Kano Y,Yanagidani T.2006.Broadband hydroseismograms observed by closed borehole wells in the Kamioka mine,Central Japan:Response of pore pressure to seismic waves from0.05to2Hz[J].J Geophys Res,111(B03410):1--11.
Muir-Wood R,King G C P.1993.Hydrological signatures of earthquake strain[J].J Geophys Res,98(B12):22035--22068.
Nur A,Byerlee J D.1971.An exact effective stresslawfor elastic deformation of rock withfluids[J].J Geophys Res,76(26):6414--6419.
Piombo A,Martinelli G,Dragoni M.2005.Post-seismic fluid flowand Coulomb stress changes in a poroelastic medium[J].Geophy J Int,162(2):507--515.
Rice J R,Cleary MP.1976.Some basic stress diffusion solutions for fluid-saturated elastic porous media with compressi-ble constituents[J].Rev Geophys,14:227--241.
Roeloffs E,Rudnicki J W.1984.Coupled deformation-diffusion effects on water-level changes due to propagating creepevents[J].Pure Appl Geophys,122(2--4):560--582.
Roeloffs E A.1996.Persistent water-level changes caused by seismic waves;evaluation of non-poroelastic mechanisms[C]∥AGU1996fall meeting.Eos,Trans,Amer Geophys Union,77(Suppl.):228.
Rudnicki J W.1986.Slip on animpermeable fault in a fluid-saturated rock mass[G]∥Earthquake Source Mechanics,Ge-ophysical Monograph Series,87.Washington:American Geophysical Union:81--89.
Rudnicki J W.1987.Plane strain dislocationin linear elastic diffusive solids[J].ASMEJ Appl Mech,109:545--552.
Rudnicki J W.2001.Coupled deformation-diffusion effects in the mechanics of faulting and failure of geomaterials[J].ASME Appl Mech Rev,54(6):483--502.
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