| 既有重载铁路路基压实指标与承载力的关联度分析研究 |
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| 作者单位： | ;1.华中科技大学土木工程与力学学院;2.武汉工程大学资源与土木工程学院;3.中国石油天然气管道科学研究院 |
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| 摘 要： | 将K_(30)、E_(VD)、E_(V2)、E_(V2)/E_(V1)4个基本参数作为判断既有重载铁路路基压实度的基本评价指标,通过现场测试获得既有重载铁路路基的4项压实度评价参数,通过轻型动力触探试验间接获得既有重载铁路路基承载力,分析既有重载铁路路基承载力与压实度指标之间的关联度,通过分析可知:4个基本参数与既有路基承载力之间的关联度较好,同时,K_(30)、E_(VD)、E_(V2)、E_(V2)/E_(V1)与路基承载力fk呈现比较明显的多项式关系,现场试验结果表明:该拟合关系对路基承载力在98~142 k Pa的c组粉质黏土填料压实度指标的估算具有一定的实用价值。
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| 关 键 词： | 重载铁路 路基 承载力 关联度 压实度 拟合 |
Research on Relevancy between Compactness Index and Bearing Capacity of Existing Heavy Haul Railway Subgrade |
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| Institution: | ,College of Civil Engineering & Mechanics,Huazhong University of Science and Technology,School of Resource of Civil Engineering,Wuhan Institute of Technology,China Petroleum Pipeline Scientific Research institute |
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| Abstract: | Four basic parameters of K_(30)、E_(VD)、E_(V2)、E_(V2)/E_(V1) are regarded as the judging compactness index of heavy haul railway subgrade and obtained by field testing. The bearing capacity of existing heavy haul railway subgrade is measured indirectly through light dynamic penetration test. The relevancy between bearing capacity of heavy haul railway subgrade and compactness index is analyzed. The results show that relevancy between the four basic parameters and the bearing capacity is acceptable and the relationships of K_(30)、E_(VD)、E_(V2)、E_(V2)/E_(V1) to the bearing capacity fkare polynomial functions respectively. The field test results show that the fitting relationship is applicable in estimating compaction index of subgrade with C group silty clay filler within the bearing capacity from 98 k Pa to 142 k Pa. |
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| Keywords: | Heavy haul railway Subgrade Bearing capacity Relevancy Compactness Fitting |
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