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本文分别阐述了横波勘探与联合剖面法的工作原理,并详细阐述了反射横波勘探在浅地层特别是松散的浅表层勘探中比纵波具有更高分辨率的优势。并以珠三角某地城市环境地质调查工区作为试验区,采用反射横波勘探和联合剖面法两种物探方法进行,根据横波地震剖面以及联剖电阻率曲线划分了该区浅表层的地层分布特征以及咸水区与淡水区的界限,不但与钻孔资料能够完全吻合,而且两种资料在地层和咸、淡水界限划分上能够互相印证。
In this paper, the working principle of transverse wave exploration and joint section method are respectively elaborated. The advantages of the reflected transverse wave exploration in the shallow stratum, especially the loose shallow surface exploration, are discussed in detail. Based on the shear wave profile and the resistivity curve of the joint, the stratigraphic distribution characteristics of the shallow surface in this area are also studied with the geochemical survey of urban environmental geology area in a certain place in the Pearl River Delta as the experimental area. The limits of the saltwater and freshwater areas are not only completely consistent with the drilling data, but also the two kinds of data can confirm each other in terms of stratigraphic and saltwater and freshwater boundaries.