作　　者： (周东）; (韦海鑫）; (杨涟）; (马少坤）; (王业田）;

机构地区： 广西大学土木建筑工程学院,广西南宁530004 广西大学工程防灾与结构安全教育部重点实验室,广西南宁530004

出　　处： 《广西大学学报（自然科学版）》 2017年第4期1361-1368,共8页

摘　　要： 通过对139份涉及南宁市冲积相黏土层的勘察资料进行统计分析,确定各物理力学参数的概率分布类型,并总结其地域性特点,为岩土工程勘察设计的参数取值提供参考。研究表明,塑限和黏聚力服从正态分布;含水量、孔隙比、液限和压缩模量服从对数正态分布;液性指数、内摩擦角和标贯锤击数服从近似正态分布;天然密度和压缩系数拒绝2种分布。南宁市冲积相黏土具有液限较高、稠度状态变化大、压缩性中等、黏聚力较小、抗剪强度较低的特点。除液性指数外,其余各物理参数的变异系数较小,主要分布区间可为勘察设计的参数取值提供参考。各力学参数的变异系数较大,在工程应用时应考虑其变异性的影响。 Based on the analysis of 139 geotechnical investigation data related to the alluvial clay layer of Nanning,the probability distribution of physical and mechanical parameters of clay layers of Nanning was determined,and its regional characteristics was summarized,which provided reference for investigation and design engineering. Research suggests that the plastic limit and the cohesion obeys the normal distribution; that the water content,void ratio,liquid limit and compression modulus are in log normal distribution; that the liquid index,internal friction angle and the blow counts of standard penetration test are approximately equal to normal distribution; that the naturaldensity and compressibility factor do not obey the two distributions. The alluvial clay layers of Nanning has higher liquid limit,larger change of consistency state,moderate compression,lower cohesion and lower shear strength. In addition to liquid index,the variation coefficient of other physical parameters is fairly small,whose main distribution can provide reference for investigation and design engineering. When the variation coefficient of each mechanical parameter is fairly large,the influence of variability should be considered in the engineering application.

关 键 词： 南宁市 冲积相黏土层 物理力学参数 概率分布 地域性特点