福州地区饱和淤泥不固结不排水强度特性研究  

Research on the Shear Strength Characteristics of Saturated Sludge in Fuzhou by Unconsolidated Undrained Triaxial Test

作　　者：邓蓉 DENG Rong(Fujian Provincial Institute of Architectural Design and Research Co.,Ltd.,Fuzhou 350001)

机构地区：[1]福建省建筑设计研究院有限公司,福建福州350001

出　　处：《福建建筑》2024年第5期132-135,共4页Fujian Architecture & Construction

摘　　要：为了解福州地区典型饱和淤泥的强度特性,进行三轴不固结不排水试验,并绘制应力圆曲线,获得抗剪强度指标C_(u)、φ_(u)值。为减少饱和度对强度指标的影响,依据勾股定理,对抗剪强度值进行修正,并分析饱和淤泥抗剪强度参数与含水率、孔隙比的相关关系,采用数理统计方法,总结含水率、孔隙比等对强度的影响。试验结果表明:饱和淤泥不固结不排水强度指标C_(u)、φ_(u)整体上是随着含水率、孔隙比的增大而呈减小趋势。In order to understand the strength characteristics of typical saturated silt in Fuzhou area,the triaxial unconsolidated undrained test was carried out in this paper,and the stress circle curve was drawn to obtain the shear strength indexes C_(u)andφ_(u).In order to reduce the influence of saturation on the strength index,the shear strength value is modified according to the Pythagorean theorem,and the correlation between the shear strength parameters of saturated silt and water content and void ratio is analyzed.The influence of water content and void ratio on strength is summarized by mathematical statistics.The test results show that the unconsolidated undrained strength indexes C_(u)andφ_(u)of saturated silt decrease with the increase of water content and void ratio.

关 键 词：淤泥 饱和度 含水率 孔隙比 不固结不排水抗剪强度 

分 类 号：TU4[建筑科学—土工工程]