| 排水和不排水条件下高温冻土松弛特性研究 |
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| 引用本文： | 王松鹤,齐吉琳. 排水和不排水条件下高温冻土松弛特性研究[J]. 冰川冻土, 2011, 33(4): 833-838 |
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| 作者姓名： | 王松鹤 齐吉琳 |
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| 作者单位： | 中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰卅l,730000;中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰卅l,730000 |
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| 基金项目： | 国家自然科学基金创新群体项目“冻土与寒区工程”(40821001); 中国科学院“百人计划”项目“多年冻土地区路基变形和稳定性研究”资助 |
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| 摘 要： | 为了探明排水条件对高温冻土应力松弛特性的影响，开展了室内松弛试验，研究了排水和不排水情况下高温冻土的应力松弛过程．结果表明：围压对高温冻土的松弛过程影响明显；不排水情况下，围压增大，松弛稳定历时延长，瞬时松弛量增大；松弛过程初期松弛速率受围压影响较大，而后逐渐减弱；排水情况下，松弛过程发展初期的松弛速率略高于不排水情况...
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| 关 键 词： | 高温冻土 应力松弛 围压 预应变 体积变化 |
Stress Relaxation of Warm Frozen Soil under Drained and Undrained Conditions |
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| WANG Song-he,QI Ji-lin. Stress Relaxation of Warm Frozen Soil under Drained and Undrained Conditions[J]. Journal of Glaciology and Geocryology, 2011, 33(4): 833-838 |
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| Authors: | WANG Song-he QI Ji-lin |
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| Affiliation: | WANG Song-he,QI Ji-lin(State Key Laboratory of Frozen Soil Engineering,Cold and Arid Regions Environmental and EngineeringResearch Institute,Chinese Academy of Sciences,Lanzhou Gansu 730000,China) |
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| Abstract: | To investigate the influence of drainage conditions on the stress relaxation features of warm frozen clay,a series of laboratory stress relaxation tests were conducted and the stress relaxation process under drained and undrained conditions of warm frozen clay is analyzed.The results indicate that confining pressure obviously influences the relaxation process of warm frozen clay.Under undrained condition,with confining pressure increasing,the critical relaxation duration,as well as the instantaneous relaxat... |
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| Keywords: | warm frozen soil stress relaxation confining pressure prestrain volumetric change |
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