含砂量对湘北湖相软土流变特性影响研究  

Effect of Sand Content on Rheological Properties of Lacustrine Soft Soil in Northern Hunan

作　　者：李和志 任虎程 葛莎 蒋鑫 叶智淼 LI Hezhi;REN Hucheng;GE Sha;JIANG Xin;YE Zhimiao(Hunan Urban Construction College,Xiangtan 411104,Hunan,China;Hunan University of Science and Technology,Xiangtan 411201,Hunan,China;Nuclear Industry Hengyang№2 Geological Engineering Investigation Co Ltd,Hengyang 421000,Hunan,China)

机构地区：[1]湖南城建职业技术学院,湖南湘潭411104 [2]湖南科技大学,湖南湘潭411201 [3]核工业衡阳第二地质工程勘察有限公司,湖南衡阳421000

出　　处：《矿冶工程》2024年第3期38-43,共6页Mining and Metallurgical Engineering

基　　金：湖南省自然资源厅科技计划(2023⁃43);湖南省自然科学基金(2021JJ30252)。

摘　　要：在室内配制不同含砂量的湘北湖相软土试样,开展了单级荷载下的一维固结流变试验,研究含砂量对湘北湖相软土流变特性的影响。结果表明,含砂量对湘北湖湘软土的固结变形影响显著;主固结完成时间几乎不受固结压力影响;主固结完成时间与砂土比呈线性递减关系;软土中含砂量越高,固结压力越大,次固结系数越小;次固结系数与砂土比存在良好的幂函数关系;软土中粗颗粒含量越高,分形维数越大;次固结系数与分形维数呈线性关系。To study the effect of sand content on the rheological properties of lacustrine soft soil in northern Hunan,one-dimensional rheological consolidation tests under single-stage load were carried out with soft soil samples prepared with different sand content in the laboratory.The results show that the sand content has a significant effect on consolidation deformation of lacustrine soft soil in northern Hunan.The time of primary consolidation is almost unaffected by consolidation pressure,and decreases linearly with the sand/soil ratio.The higher the sand content in soil,the greater the consolidation pressure,and the smaller the secondary consolidation coefficient.The relationship between the secondary consolidation coefficient and the sand/soil ratio can be well represented by a power function.The higher the content of coarse particles in soft soil,the greater the fractal dimension.There is a linear relationship between the secondary consolidation coefficient and the fractal dimension.

关 键 词：含砂量 湖相软土 流变特性 固结流变试验 固结时间 砂土比 

分 类 号：TU432[建筑科学—岩土工程]