摘要
本文主要根据弹性波传播的基本理论,结合现有浅层数字增强型地震仪(ES—1210F)和微机及其它设备,论述了采用小应变敲击法进行桩基质量无损检测及承载力估算的原理、方法和技术,并给出了应用实例。
In this paper, starting from the foundamental theory of the elastic wave propagation, the writer has more fully discussed the principle and technique about estimating bearing capacity and checking the pile foundation qualitz by means of the small strain thump. On principle, the writer mainly discussed the formation machanism of reflective waves. On the piling, he set up the mathematical model for checking quality of the piling and estimating the bearing capacity. In respect of the data acquisition, the technique available for data acquisition is discussed and carried on by using the present digital-strengthen seismic apparatus ( ES-1210F ) and other instruments. During the treating process of the data in a minicomputer, he has proved partial processed results. At last, he consulted the general standards and classification of checking and measuring the quality of the piling and provided the quantitative interpretive results of the real measurement piling and the calculation results of the allowable bearing capacity in a single pile according to the comparision and analysis of real measurement data and the imitating piling.
