湛江结构性黏土空间变异性及物理力学指标规律研究  

Spatial Variability and Physical-Mechanical Indexes Regularity of Structural Clays in Zhanjiang

作　　者：曾岳 胡瑾 管圣功 吕桂生 ZENG Yue;HU Jin;GUAN Shenggong;LV Guisheng(WSGRI Engineering&Surveying Co.Ltd.,Wuhan 430080;College of Civil Engineering,Shaoxing University,Shaoxing 312000)

机构地区：[1]中冶武勘工程技术有限公司,武汉430080 [2]绍兴文理学院土木工程学院,浙江绍兴312000

出　　处：《土工基础》2024年第3期469-472,495,共5页Soil Engineering and Foundation

摘　　要：根据特大型湛江钢铁场地岩土工程勘察及研究成果,对湛江组结构性黏土进行平面变异性、垂直变异性分析,选取两个典型的地貌单元,分析湛江组黏土物理力学指标变化规律。结果表明:(1)湛江组黏土层顶面在空间上整体呈波浪形分布,在空间上分布无规律性,差异很大。(2)湛江组黏土自上而下,标贯击数随深度增加而增大,呈线性变化规律。(3)不同埋深、不同平面位置的湛江组黏土的颗粒级配、物质来源较稳定,均具有高液限、高塑性。其它物理力学指标差别较大,但随深度具有线性变化的规律性。相关研究可为岩土工程设计参数取值提供依据,为建构筑物基础设计与施工提供借鉴与参考。Based on the geotechnical investigation results of a super large Zhanjiang steel factory site,and on the basis of the large amount of data obtained,this paper analyzes the horizontal and vertical variabilities of the structural clay of Zhanjiang Formation.Two typical geomorphic units are selected and analyzed for the variation of the physical and mechanical indexes of the clay of Zhanjiang Formation.The results indicate that:(1)the top surface of the clay layer in Zhanjiang Formation is generally distributed in a wavy shape in space,with the irregular spatial distribution and significant differences.(2)From the top to the bottom,the number of standard penetration tests(SPT)increases with depth in Zhanjiang Formation clay,following a linear variation pattern.(3)The particle size distribution and material source of Zhanjiang Formation clay with different embedment depths and plane positions are relatively stable,with the high liquid limits and the high plasticity.There are significant differences in other physical and mechanical indicators,but there is a linear variation pattern with the depth.These investigations provide a basis for the selection of geotechnical design parameters,and adds value to the design and construction projects.

关 键 词：湛江组黏土 平面变异性 垂直变异性 物理力学指标 回归分析 

分 类 号：TU447[建筑科学—岩土工程]