利用高频地震波检测混凝土构件完整性的方法

The Test Method of Concrete Elements Integrity Using

大型混凝土构件(如高层建筑基础的地梁、桩承台等)在施工过程中可能造成局部松散、空洞、蜂窝或离析等质量问题。为检测混凝土构件的的完整性,采用了地震勘探方法中的地震映象法(又称地震共偏移距法)。通过在模拟裂缝、空洞模型上的试验,获得了存在异常体时,地震映象时间剖面的波形特征;测得偏移距、点距等参数变化时,对地震映象时间剖面的影响。模型实验和实测工作证明:在合理选择震源及各种测量参数条件下,高频地震映象方法可有效地检测混凝土构件完整性,实现对混凝土构件质量新的监测。

Cavity and honeycomb may form in the construction of concrete elements such us the column base and ground base beam of a high building. Seismic image profiling method(common offset profiling) is used to verify the integrity of the concrete construction elements. By model experiments, the anomalous characteristics of cracks and cavities on seismic image profiling are obtained, and the influences of offset and other survey parameters on the seismic image profiling are studied. The model experiments and practical application show that by careful selection of seismic source and survey parameters, the seismic image profiling method can used effectively to verify of the integrity of concrete construction elements.