秦皇岛地区花岗岩砂质黏性土强度及变形特性研究  

Study on characteristics of strength and deformation of residual soil of granite in Qinhuangdao area

作　　者：李康波 赵朕 任宏磊 王文军 李洋洋 Li Kangbo;Zhao Zhen;Ren Hongei;Wang Wenjun;Li Yangyang(Kan Qinhuangdao General Engineering Design&Research Institute Corporation,MCC,Qinhuangdao 066004,)

机构地区：[1]中冶沈勘秦皇岛工程设计研究总院有限公司,河北秦皇岛066004

出　　处：《工程勘察》2024年第3期19-23,共5页Geotechnical Investigation & Surveying

摘　　要：花岗岩广泛分布于秦皇岛地区,其风化形成的砂质黏性土作为一种特殊性土在该地区工程中应用普遍。为研究花岗岩类砂质黏性土的强度和变形规律,采用实际工程中的勘察土样,对不同颗粒含量和不同含水率的试验数据进行了分析整理与对比研究。结果表明:花岗岩类砂质黏性土的压缩模量和黏聚力均随其颗粒含量和含水率的增大而减小,结构性破坏和黏聚力减小是其遇水软化崩解的主要原因。砂质黏性土的内摩擦角随颗粒含量和含水率变化表现为无序性。Granite is widely distributed in the Qinhuangdao area.As a special kind of soil,sandy clayey soil of granite residual soil is widely used in the local engineering.In order to study the law of strength and deformation of granite sandy clayey soil,the experimental data of different particle content and moisture content are analyzed using the soil samples in practical engineering.The study shows that the compression modulus and cohesive force of the sandy clayey soil of granite decreases with the particle content and moisture content increase,and the structural damage and the decrease of cohesive force are the main reasons for its softening and disintegration when exposed to water.The friction angle of sandy clayey soil is disordered with the change of particle content and water content.

关 键 词：砂质黏性土 压缩模量 黏聚力 内摩擦角 软化崩解 

分 类 号：TU411.3[建筑科学—岩土工程]