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| 路基土回弹模量湿度调整系数预估研究 | |
| 引用本文： | 林小平,李兴华,凌建明,周亮.路基土回弹模量湿度调整系数预估研究[J].同济大学学报(自然科学版),2011,39(10):1490-1494. |
| 作者姓名： | 林小平 李兴华 凌建明 周亮 |
| 作者单位： | 1. 交通运输部科学研究院,北京,100029 2. 交通运输部规划研究院,北京,100028 3. 同济大学道路与交通工程教育部重点实验室,上海,201804 |
| 基金项目： | 交通部西部交通建设科技资助项目（200731822301） |
| 摘 要： | 选取了几种代表性的路基土样,采用UTM(万能材料试验机)动力三轴试验系统,测试不同湿度下的回弹模量,分析湿度对路基土回弹模量的影响规律,利用测试结果,对Witczak回弹模量湿度调整系数模型中的参数进行校正,建立适用于我国粗细粒土组的湿度调整系数预估模型.结果表明,路基土湿度在最佳含水率饱和度±20%区间内,模量调整系数与饱和度差值近似呈线性关系,而当湿度低于最佳含水率饱和度20%以上时,模量调整系数受饱和度变化的影响很小.针对不同类型土组,应用建立的模型,推荐了回弹模量的湿度调整系数,可结合室内回弹模量测试,反算路基在实际湿度状况下的回弹模量值. |
| 关 键 词： | 路基土回弹模量 湿度 调整系数 预估模型 |
| 收稿时间： | 7/14/2010 6:13:04 PM |
| 修稿时间： | 7/15/2011 4:54:10 PM |
Study on Moisture Adjustment Factor for Resilient Modulus of Subgrade |
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| LIN Xiaoping,LI Xinghu,LING Jianming and ZHOU Liang.Study on Moisture Adjustment Factor for Resilient Modulus of Subgrade[J].Journal of Tongji University(Natural Science),2011,39(10):1490-1494. | |
| Authors: | LIN Xiaoping LI Xinghu LING Jianming and ZHOU Liang |
| Institution: | China Academy of Transportation Sciences,Beijing 100029,China;Transport Planning and Research Institute,Beijing 100028,China;Key Laboratory of Road and Traffic Engineering of the Ministry of Education,Tongji University,Shanghai 201804,China;Transport Planning and Research Institute,Beijing 100028,China |
| Abstract: | Several types of subgrade soil were sampled,and resilient modulus of subgrade soil with different moisture were measured using UTM dynamic triaxial test symtems.The effect of moisture on resilient modulus was analyzed and parameter calibration was executed on Witczak model of moisture adjustment factor for resilient modulus,furthermore,the model of moisture adjustment for resilient modulus applicable to coarse and fine grained soil in China was established.The results indicate that moisture adjustment facto... |
| Keywords: | resilient modulus of subgrade moisture adjustment factor predictive model |
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