土坝体隐患弹性波探测中的横波优势

用于土坝体隐患探测中的弹性波波媒主要包括纵波、横波、表面波等等,由于组成土坝体不同介质结构特有的弹性波波速特性,选择横波作为弹性波勘探的波媒具有比纵波优越的地球物理前提条件,而且通常具有能量强、分辨率高、波成分相对简单、易于对比分辨(极性特征)等特点;当然,横波具有主频频率低、激发效率低等不利特征.但综合来看,在土坝体隐患探测中,选择弹性波勘探方法,还是以横波作为波媒具有明显优势.

The advantage of S-wave in detecting hidden troubles in earth dam

Wave medium used in the elastic wave prospecting of hidden troubles in earth dam includes P-wave,S-wave,surface wave and etc.As the different soil consisting the dam has specific character of wave velocity,choosing S-wave,than P-wave,as the wave medium for the elastic prospecting possesses the predominant advantage of Geophysical precondition.Moreover,S-wave usually has peculiarities of powerful energy,high resolution,simple wave construction and easy to distinguish.Certainly,S-wave holds the disadvantages of lower main frequency and lack of efficiency.Taking one with another,we had better select S-wave as the wave medium for elastic detecting as it has clear advantages.