【摘要】 在工程场地地震安全性评价中剪切波速是不可或缺的重要参数之一.为了估算无法测试地段的剪切波速,本文采用了①线性拟合Y=aX+b;②多项式拟合Y=aX3+bX2+cX+d;③指数拟合Y=aXb三种模型对昆明盆地典型土层分别作了统计分析,对比结果得出,黏土、粉质黏土和泥炭质土剪切波速与土层深度关系采用指数拟合要好于其它两种方式,而粉土和粉砂剪切波速与土层深度关系则采用多项式拟合的结果最令人满意.换言之,在昆明盆地,可采用指数来估计黏性土剪切波速值,多项式关系估算无黏性土剪切波速值.更多还原

【Abstract】 Shear wave velocity is one of most important parameter in evalution of seismic safety for engineering sites.To cope with the problem that measuring shear wave velocity can not be achieved in some place,this paper used ①the linear fitting Y=aX+b,②polynomial fitting Y=aX3+bX2+cX+d,③exponential fitting Y=aXb to analyzed statistically between shear wave velocity and depth of soil in Kunming Basin.From the results we found that,using exponential fitting method to fit the relationship between depth and the shear wave velocity of clay,silty clay and peat soil is better than the other two methods;for silts and fine sand,polynomial fitting method is most.In other words,we can use exponential fitting method to estimate the shear wave velocity of cohesive soil,and use polynomial fitting method to estimate the shear wave velocity of cohesionless soil in Kunming Basin.更多还原