对地强耦合拖曳式检波系统的研制
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摘要
因城市地下浅层空间探测要求在硬化路面上进行无损检测,而传统的采集方法是采用石膏或其它粘合剂固定检波器进行数据采集,施工效率较低,为此开发研制了一种对地强耦合拖曳式检波系统。该系统通过信号线缆和装配在耦合底盘上的检波装置形成单条或多条24道的拖曳式检波串,从而实现二、三维数据采集。通过拖拽式检波系统和粘接式检波系统在相同激发条件下数据对比,其在波形能量、频谱、功率谱、相位谱及叠加效果等方面具有较高的一致性,且拖拽式检波系统无明显的共振现象。试验证明该系统对地耦合性能良好,施工效率高,适用于城市浅层地震勘探。
The shallow underground space prospecting in urban area requires nondestructive testing on hardened pavement,while the conventional method is to use gypsum or other adhesives fixed geophone to carry out data acquisition. But the method has lower operation efficiency; consequently a towed geophone system with strong-coupling to ground has been developed. The system is through signal cable and geophone installation on coupling chassis to form single or multiple 24 traces towed geophone strings,accordingly has realized 2D and 3D data acquisition. Through the contrast of data from towed geophone system and adhesive fixed geophone system has found that on aspects of waveform energy,frequency spectrum,power spectrum,phase spectrum and stacking effect have higher consistency,while from towed geophone system without obvious resonance phenomenon. Tests have demonstrated that the system has stronger coupling to ground with higher operation efficiency and applicability in urban shallow zone seismic prospecting.
The shallow underground space prospecting in urban area requires nondestructive testing on hardened pavement,while the conventional method is to use gypsum or other adhesives fixed geophone to carry out data acquisition. But the method has lower operation efficiency; consequently a towed geophone system with strong-coupling to ground has been developed. The system is through signal cable and geophone installation on coupling chassis to form single or multiple 24 traces towed geophone strings,accordingly has realized 2D and 3D data acquisition. Through the contrast of data from towed geophone system and adhesive fixed geophone system has found that on aspects of waveform energy,frequency spectrum,power spectrum,phase spectrum and stacking effect have higher consistency,while from towed geophone system without obvious resonance phenomenon. Tests have demonstrated that the system has stronger coupling to ground with higher operation efficiency and applicability in urban shallow zone seismic prospecting.
引文
[1]李万伦,田黔宁,刘素芳,等.城市浅层地震勘探技术进展[J].物探与化探,2018,42(04):653-661.
[2]赵镨,姜杰,王秀荣.城市地下空间探测关键技术及发展趋势[J].中国煤炭地质,2017,29(09):61-66+73.
[3]段建华,郝卫华.城市工程地震勘察的采集技术[J].中国煤炭地质(原中国煤田地质),2002(01):69-70.
[4]K T Spikes,et al. Varying the Effective Mass of Geophones[J].Geophysics,2001,66(6):1850-1855.
[5]Christine E. Krone. Geophone Ground Coupling[J]. Geophysics,1984,49(6):722-731.
[6]Guy G. Drijkoningen,et al. A New Elastic Model for Ground Coupling of Geophones with Spikes[J]. Geophysics,2006,71(2):9-17.
[7]陆基孟.地震勘探原理[M].山东东营:中国石油大学出版社,2011.
[2]赵镨,姜杰,王秀荣.城市地下空间探测关键技术及发展趋势[J].中国煤炭地质,2017,29(09):61-66+73.
[3]段建华,郝卫华.城市工程地震勘察的采集技术[J].中国煤炭地质(原中国煤田地质),2002(01):69-70.
[4]K T Spikes,et al. Varying the Effective Mass of Geophones[J].Geophysics,2001,66(6):1850-1855.
[5]Christine E. Krone. Geophone Ground Coupling[J]. Geophysics,1984,49(6):722-731.
[6]Guy G. Drijkoningen,et al. A New Elastic Model for Ground Coupling of Geophones with Spikes[J]. Geophysics,2006,71(2):9-17.
[7]陆基孟.地震勘探原理[M].山东东营:中国石油大学出版社,2011.