STATISTICAL STUDY ON RELATIONSHIP BETWEEN SHEAR WAVE VELOCITY AND SOIL DEPTH IN WEINAN
Based on the measured shear wave velocity data of 260 boreholes in Weinan City,the re-lationship between shear wave velocity and depth of common soil types in this area is statistically re-gressed according to the site category by using the first-order function,second-order polynomial and third-order polynomial models.By comparing the goodness of fit,the optimal fitting regression rela-tionship is the third-order polynomial model.The prediction accuracy of the optimal model is verified by comparing the predicted wave velocity of the reserved borehole with the measured shear wave ve-locity.At the same time,the influence of rock and soil types and site types on the prediction accura-cy of the model is studied.The results show that distinguishing lithology and classifying site types can reduce the relative error of the predicted wave velocity to a certain extent and improve the pre-diction accuracy of the model.Taking loess and silty clay as examples,the predicted values of wave velocity obtained by the recommended model and the literature model of the same loess site are com-pared.It shows that the statistical relationship model between shear wave velocity and soil depth has obvious regional characteristics,and the type and depth of rock and soil also have certain influence on the regional adaptability of the model.When the measured data of shear wave velocity cannot be obtained in practical work,the statistical model of the region should be preferred.
Engineering earthquakeShear wave velocityDepth of soil layerSite type
万方数据
维普
