昆明盆地剪切波速与土层深度关系的统计分析

英文篇名：Statistical analysis of relationship between shear wave velocity and depth of soils in Kunming Basin
中文刊名：云南大学学报(自然科学版)
英文刊名：Journal of Yunnan University(Natural Sciences Edition)
作者：李建有 ; 王朝进 ; 徐兴倩 ; 林凤仙
英文作者：LI Jian-you ; WANG Chao-jin ; XU Xing-qian ; LIN Feng-xian(Kunming Southern Geophysical Technology Development Co. ; Ltd.650231 ; China)
中文关键词：昆明盆地 ; 剪切波速 ; 土层深度 ; 统计分析
英文关键词：Kunming Basin ; shear wave velocity ; depth of soils ; statistical analysis
出版日期：2012-10-15
机构：昆明南方地球物理技术开发有限公司;
年：2012
期：S2
出版单位：云南大学学报(自然科学版)

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.
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.

引文

[1]兰景岩,薄景山,等.剪切波速对设计反应谱的影响研究[J].震灾防御技术,2007,2(1).
[2]李存志,李向新,等.昆明盆地剪切波速与地基特性相关分析研究[J].昆明冶金高等专科学校学报,2006,22(3).