垫层料冻融变形特性的缩尺效应试验
发布时间：2019-04-26 09:03
【摘要】：垫层料冻融变形过大会影响寒区面板坝正常运行,有必要对垫层料冻胀融沉特性开展深入研究。受仪器设置限制,室内试验时只能采用缩尺后的垫层料试样,这可能会对试验结果有较大影响。为了揭示冻融试验中缩尺效应的影响规律,对不同限制粒径的试样进行了冻融试验。结果表明,相同相对密实度和含水率条件下,随着限制粒径的增大,试样冻胀变形量呈双曲线趋势减小;而冻融后总变形率先增大后减小。对比分析显示,试验结果与孔隙模型预测值吻合较好。
[Abstract]:The freezing and thawing deformation of cushion material affects the normal operation of concrete face dam in cold area, so it is necessary to study the frost heaving and thawing characteristics of cushion material. Due to the limitation of instrument setting, only the sample of pad layer after scale can be used in laboratory test, which may have a great influence on the test results. In order to reveal the influence rule of scale effect in freeze-thaw test, freeze-thaw tests were carried out on samples with different size limits. The results show that under the same relative compactness and moisture content, the frost heave deformation decreases with the increase of limited particle size, while the total deformation increases first and then decreases after freezing and thawing. The comparative analysis shows that the experimental results are in good agreement with the prediction values of the pore model.
【作者单位】： 河海大学岩土力学与堤坝工程教育部重点实验室 江苏省岩土工程技术工程研究中心 河海大学;
【基金】：中央高校基本科研业务费专项资金(B15020060) 国家自然科学基金(51378008)资助
【分类号】：TV41
本文编号：2465939
[Abstract]:The freezing and thawing deformation of cushion material affects the normal operation of concrete face dam in cold area, so it is necessary to study the frost heaving and thawing characteristics of cushion material. Due to the limitation of instrument setting, only the sample of pad layer after scale can be used in laboratory test, which may have a great influence on the test results. In order to reveal the influence rule of scale effect in freeze-thaw test, freeze-thaw tests were carried out on samples with different size limits. The results show that under the same relative compactness and moisture content, the frost heave deformation decreases with the increase of limited particle size, while the total deformation increases first and then decreases after freezing and thawing. The comparative analysis shows that the experimental results are in good agreement with the prediction values of the pore model.
【作者单位】： 河海大学岩土力学与堤坝工程教育部重点实验室 江苏省岩土工程技术工程研究中心 河海大学;
【基金】：中央高校基本科研业务费专项资金(B15020060) 国家自然科学基金(51378008)资助
【分类号】：TV41
【相似文献】
相关期刊论文 前5条
1 钮长仁;项玉璞;;早期混凝土受冻前强度与冻融变形特征值的初步研究[J];低温建筑技术;1991年04期
2 张旭芝;王星华;;青藏铁路多年冻土区涵洞基础的冻融变形特征[J];水文地质工程地质;2006年02期
3 王公山;强务法处理冻胀性地基的应用研究[J];低温建筑技术;1987年04期
4 李木子;李志军;卢鹏;张丽敏;王永学;李广伟;;木栈道冻融变形物理模拟试验研究[J];低温建筑技术;2014年01期
5 ;[J];;年期
，本文编号：2465939
本文链接：https://www.wllwen.com/kejilunwen/shuiwenshuili/2465939.html
