| 基于基质吸力的粘性路基土动回弹模量预估模型研究 |
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| 引用本文： | 邱欣,钱劲松,张世洲.基于基质吸力的粘性路基土动回弹模量预估模型研究[J].水文地质工程地质,2011,38(3):49-53. |
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| 作者姓名： | 邱欣 钱劲松 张世洲 |
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| 作者单位： | 浙江师范大学工学院;同济大学道路与交通工程教育部重点实验室;辽宁省交通规划设计院; |
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| 基金项目： | 国家青年科学基金项目，浙江省教育厅基金项目 |
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| 摘 要： | 为解决非饱和粘性路基土动回弹模量参数取值问题,采用滤纸法测定土样基质吸力,获取其土水特征曲线,并利用室内重复动三轴测试方法,进行了动态回弹模量测试,并探讨了动回弹模量的影响因素及其规律,进而在考虑含水量与基质吸力之间对应关系的基础上,集成创建了综合反映湿度状况(基质吸力)与应力状况(围压和循环偏应力)影响的粘性路基土新型动态回弹模量预估模型。研究结果表明,土水特征曲线Fredlund&Xing模型能够较好地关联非饱和粘性路基土基质吸力与湿度之间的相关关系;回弹模量测试值随围压、基质吸力和压实度的提高而增大,随循环偏应力和含水量的增大而减小。
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| 关 键 词： | 回弹模量 预估模型 基质吸力 土水特征曲线 |
Research on prediction model of dynamic resilient modulus of subgrade soil based on matric suction |
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| QIU Xin,QIAN Jin-song,ZHANG Shi-zhou.Research on prediction model of dynamic resilient modulus of subgrade soil based on matric suction[J].Hydrogeology and Engineering Geology,2011,38(3):49-53. |
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| Authors: | QIU Xin QIAN Jin-song ZHANG Shi-zhou |
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| Affiliation: | 1.Engineering College,Zhejiang Normal University,Jinhua 321004,China;2.Key Lab.of Road and Traffic Engineering of the Ministry of Education,Tongji University,Shanghai 2018042,China;3.Liaoning Transportation Planning Design Institute,Shenyang 110015,China |
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| Abstract: | Matric suctions of test specimens were surveyed by using the filter paper method,and parameters of soil-water characteristic curve(SWCC) equations were obtained by using regression analysis.For the sake of investigating factors which affect subgrade dynamic resilient modulus(MR) and their lows,a series of resilient modulus tests were carried out with repeated load triaxial tests on reconstituted cylindrical specimens.Based on the corresponding relationship between moisture content and matric suction,an inno... |
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| Keywords: | resilient modulus prediction model matric suction soil-water characteristic curve |
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