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温度及饱和度对粉质黏土变形特性的影响

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为研究温度及饱和度对粉质黏土变形特性的影响,利用GDS非饱土三轴测试系统和GDS温控式静/动三轴测试系统对天然含水率下的非饱和土及饱和土进行三轴试验,研究不同温度对其变形参数影响并对比分析.结果表明在不同温度条件下,两种不同饱和度的粉质黏土均表现为应变硬化的特性.两种饱和度的粉质黏土在相同围压下轴向变形量均随温度降低而增加,且饱和土的变形量大于非饱和土.两种饱和度的粉质黏土在相同围压下弹性模量均随温度降低而增加,且在0~-2℃区间变化最剧烈.研究可为季冻区粉质黏土地基中的工程设计及施工提供理论参考.
EFFECTIVENESS OF TEMPERATURE AND SATURATION ON THE DEFORMATION CHARACTERISTICS OF SILTY CLAY
In order to study the effectiveness of temperature and saturation on the deformation characteristics of silty clay,triaxial tests are carried out on unsaturated and saturated soils under natural moisture content using GDS unsat-urated soil triaxial testing system and GDS temperature-controlled static/dynamic triaxial testing system.The results show that the silty clays with two different saturations are characterized by strain hardening under different tempera-ture conditions.Under the same confining pressure,the axial deformation of silty clay with two different degrees of saturation increases with the decrease of temperature,and the deformation of saturated clay is larger than that of un-saturated clay.The elastic module of both saturated silty clays under the same confining pressure increased with the decrease of temperature,and the most drastic change was in the interval from 0~-2℃.The study may provide theoret-ical guidance and reference for engineering design and construction in seasonal frozen region silty clay foundations.

seasonal frozen regiondeformation parametertriaxial test

赵中航、林昱利、郭浩天、刘全想、任淇淇

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吉林建筑大学测绘与勘察工程学院,长春 130118

季冻区岩土工程研究所,长春 130118

粉质黏土 季冻土 三轴试验

吉林建筑大学国家级创新训练项目吉林省科技发展计划项目

202210191006YDZJ202201ZYTS490

2024

低温建筑技术
黑龙江省寒地建筑科学研究院

低温建筑技术

影响因子:0.237
ISSN:1001-6864
年,卷(期):2024.46(2)
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