基于表面波法的剪切波速测试与场地土液化判别

Shear wave velocity obtained from surface wave method and application to liquefaction estimation of sites

剪切波速是岩土的一个重要工程特性参数。文中详细介绍浅层物探调查中的面波法的原理、分析方法,并利用面波法对王庆坨水库场地进行大面积勘探,获得水库场地的地下剪切波速度构造,利用面波所得剪切波速对王庆坨水库场地在VII和VIII级地震下进行液化判别;通过实验和回归分析得到了王庆坨地区第四系粘性土与粉土的剪切波速与标贯击数的关系曲线,为实际工程建设提供一种快速求得标贯击数的方法,对当地的工程场地的分类和评价有一定的参考价值。

Shear wave velocity is an important characteristic parameter.The principle and the analysis method of surface wave method in physical prospecting investigation of shallow layers is introduced in detail.The site of Wangqingtuo reservoir are explored by surface wave method to obtain the shear wave velocity structure,which is applied to estimate the liquefaction possibility of the site under the earthquake of intensities VII and VIII.The statistical relation of shear wave velocity and penetrating number is obtained by regressive analysis of the test values,which will provide some references for the evaluation and classification of engineering sites.