基于剪切波速的深层砂土地震液化研究

Study on Earthquake Liquefaction Potential of Sandy Soil in Deep Layer Based on Shear Wave Velocity

阐述了剪切波速法判别饱和砂土液化的原理,结合武汉地区某工程实例,对场地内埋深超越"规范法"适用范围的砂层进行液化判别,确定场地的临界液化深度。通过与室内动三轴试验的对比得出,2种方法的液化判别结果及确定的临界液化深度均吻合较好,验证了以剪切波速为指标的液化评估方法的可行性。

This paper expounds the principle of the shear wave velocity method to evaluate the liquefaction of saturated sandy soil.Combined with a project example in Wuhan,the method is used to discriminant the liquefaction of sandy soil buried deeper than the application range of the‘code method’and the critical liquefaction depth of the field is determined on this basis.Compared with the dynamic triaxial test,the results of the identification of liquefaction and determination of the critical liquefaction depth are in good agreement,and it is proven that the liquefaction evaluation method based on shear wave velocity is feasible.