【摘要】 叙述桩底下浅层基岩内的洞穴勘探方法.采用高频地震勘探仪系统,或在桩底原位激发、接受振波,或几个桩底联测,互为激发、接受,或将两者合并进行.通过对震波的震相、周期和振幅等特征的分析确定桩底下浅层基岩内是否存在洞穴.震波周期大,反射波到时早,则在浅层基岩内存在洞穴;而周期小,且无反射波者,则在浅层基岩内没有洞穴.更多还原

【Abstract】 This paper discusses a method of seismic prospecting used to find caves in the rockmass behind stakes. In this method, highfrequency seismic prospecting system is employed and the array of sources or receivers can vary with different patterns. Whether there is a cave in rockmass behind stakes can be settled down by the analysis of wave phase, period and amplitude. Seismic waves with long period and short propagation time always mean the appearance of caves.更多还原