\r雷华阳^{1, 2}，冯双喜¹，郝 琪¹，张雅杰¹，Fathia Abdourazk ABDI\r¹\r
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AuthorsHTML:\r雷华阳^{1, 2}，冯双喜¹，郝 琪¹，张雅杰¹，Fathia Abdourazk ABDI\r¹\r
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AuthorsListE:\rLei Huayang^{1, 2}，Feng Shuangxi ¹，Hao Qi¹，Zhang Yajie¹，Fathia Abdourazk ABDI\r¹\r
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AuthorsHTMLE:\rLei Huayang^{1, 2}，Feng Shuangxi ¹，Hao Qi¹，Zhang Yajie¹，Fathia Abdourazk ABDI\r¹\r
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Unit:\r\r1. 天津大学建筑工程学院，天津300354；\r
\r\r2. 天津大学滨海土木工程结构与安全教育部重点实验室，天津300354\r
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Unit_EngLish:\r1. School of Civil Engineering，Tianjin University，Tianjin 300354，China；
2. Key Laboratory of Coast Civil Structure Safety of Ministry of Education，Tianjin University，Tianjin 300354，China\r
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Abstract_Chinese:\r揭示温度对吹填土固结和强度特性的影响，对合理评价热真空预压加固效果具有重要意义．通过自主研发的温控三轴仪，系统开展了吹填土的热力固结和强度试验研究．重点分析了不同温度下吹填土的排水体积、渗透系数、孔隙水压力和固结度的演化规律，研究了固结后吹填土在排水和不排水条件下有效应力路径和应力应变关系，提出了考虑不同温度的邓肯-张模型参数．结果表明，升温过程中，土体固结变形存在明显的三阶段特征：快速增加阶段、缓慢增加阶段和稳定阶段．排水量呈指数关系增长，渗透系数线性增长，孔隙水压力消散加快，固结度逐渐增大，吹填土排水与不排水抗剪强度均显著提高．不排水条件下CSL 线斜率M 值大于排水条件下M 值．升温不排水条件下吹填土有效球应力p′值基本维持不变，升温排水条件下吹填土偏应力q 随着球应力p 线性增加．确定了不同温度条件下邓肯-张模型参数，提出升温不排水条件下，可采用邓肯-张模型来描述应力应变关系，但在升温排水条件下，可采用邓肯-张模型和线性模型综合反映应力应变关系．\r
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Abstract_English:\rAbstract：It is of great significance to reveal the influence of temperature on consolidation and strength characteristics of dredger fill，which could reasonably evaluate the effect of vacuum preloading with heating．Thermal consolidation and strength tests were systematically performed by a temperature-controlled triaxial apparatus，which was developed independently．The developments of drainage volume，hydraulic conductivity，pore water pressure，and consolidation degree at different temperatures were analyzed．The effective stress path and stress-strain relation under drainage and undrained conditions were studied．The Duncan-Chang model parameters at different temperatures were reported．The results showed that there were three distinct stages of consolidation deformation in the process of heating：fast increase，slow increase，and stable．The drainage volume increased exponentially，the hydraulic conductivity increased linearly，the pore water pressure decreased，the degree of consolidation increases，as the temperature was increasing．In addition，the drainage and undrained shear strength of dredger fill were obviously increased．The M value in the undrained condition，the slope of the CSL line，was larger than that under the drained condition．The effective spherical stress p′ value of dredger fill remained basically unchanged under the condition of heating and undrainage，while the relation between the deviatoric stress q and spherical stress p of the dredger fill increased linearly under the condition of heating and drainage．Finally，the parameters of the Duncan-Chang model at different temperatures were determined．This paper offered that the Duncan-Chang model could be used to describe the stress-strain relationship under the condition of heating and drainage，but the Duncan-Chang model and the linear model could be used to comprehensively reflect the stress-strain relationship under the condition of heating and drainage．\r
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Keyword_Chinese:吹填土；温控三轴仪；热力固结；强度特性\r

Keywords_English:dredger fill；temperature controlled triaxial apparatus；thermal consolidation；strength characteristics\r


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