CAJ | 학술논문

某电厂大坝为黏土斜墙堆石坝,其黏土防渗层的状态(密实性、一致性等)是极其重要的问题.瞬态瑞利面波探测技术可用来检测堤坝松散层和土坝渗漏水异常区.可控震源激发波形精确可控,可激发高频地震波,以提高地震勘探分辨率,进行浅层薄层地震勘探.本文应用研制的可控震源地震勘探系统对大坝进行了实地测试,对测试数据进行了频散分析,衰减系数与能量分析,波速计算分析.分析结果表明,大坝局部区域存在低速点;研制的可控震源系统可有效地进行浅层地震信号勘探.
모전엄대패위점토사장퇴석패,기점토방삼층적상태(밀실성、일치성등)시겁기중요적문제.순태서리면파탐측기술가용래검측제패송산층화토패삼루수이상구.가공진원격발파형정학가공,가격발고빈지진파,이제고지진감탐분변솔,진행천층박층지진감탐.본문응용연제적가공진원지진감탐계통대대패진행료실지측시,대측시수거진행료빈산분석,쇠감계수여능량분석,파속계산분석.분석결과표명,대패국부구역존재저속점;연제적가공진원계통가유효지진행천층지진신호감탐.
There is a rockfill dam with clay facing in Guangdong, and its earth blanket′s state such as compactness and uniformity is important. Transient Rayleigh wave can be used to inspect the loose layer and leakage anomaly region of the earth dam. The vibroseis source can arouse precise and controllable high frequency seismic wave so as to improve seismic solution for shallow seismic prospecting. Field test is carried out with vibroseis seismic prospecting system developed by our lab in Nanshui dam. Frequency dispersion,attenuation coefficient,energy and wave speed are analyzed as the testing data. It is indicated that the speed of some spots is low,and that the vibroseis system can do shallow seismic prospecting effectively.