【摘要】 本文根据地震波在一维层状介质中的传播理论,给出了地震波在一维层状介质中传播的递推公式。计算了在地表垂直入射一人工地震波时,各种不同地层对地表人工地震波反应的时程曲线。结合工程实例,给出了两类问题的测试及判别方法:第一类问题是桩已形成时,在桩基顶部测试桩尖下石灰岩的完整性;第二类问题是未成桩前,在桩孔底部测试石灰岩的完整性。更多还原

【Abstract】 Based on the propagation theory of seismic wave in one dimensional layered medium this paper gives the recurrence formula of such a propagation.It calculates the time-history response curve of different layers to a vertical incident of artificial seismic wave from the ground surface. Combining with case histories, it gives the testing and discriminant methods of two kinds of problems: (l)testing at pile top to see the integrity of limestone under the pile tip. (2) testing at the pile hole bottom to see the integrity oflimestone before the pile being formed.更多还原