基于多参数的级配碎石力学性能预估模型

发布时间：2018-05-24 17:34

本文选题：道路工程 + 级配碎石　；参考：《广西大学学报(自然科学版)》2014年04期

【摘要】：为了明确级配碎石的力学性能,采用密度试验、空隙率试验、加州承载比(CBR)试验、动三轴试验研究级配类型和成型方式对级配碎石力学性能的影响规律,并建立了力学性能的多参数预估模型。结果表明:1击实成型的最大干密度为振动成型的1.03~1.07倍。2连续型级配碎石的CBR值在振动成型下为击实成型的1.51倍,回弹模量为1.08倍;回弹模量与CBR值呈幂函数,与最大干密度和空隙率的乘积成正比。3间断型级配碎石的CBR值在击实成型下为振动成型的1.49倍,回弹模量为1.05倍;回弹模量与CBR值呈幂函数,与最大干密度和空隙率的乘积成反比。4骨架结构是决定级配碎石力学性能的第一因素。研究结果为级配碎石力学性能的预测提供理论依据,为配合比设计和确定施工工艺提供试验支撑。
[Abstract]:In order to clarify the mechanical properties of graded macadam, density test, porosity test, California bearing ratio CBR test and dynamic triaxial test were used to study the influence of gradation type and molding method on mechanical properties of graded crushed stone. A multi-parameter prediction model of mechanical properties is established. The results show that the maximum dry density of 1: 1 compaction is 1. 03 / 1. 07 times of vibration molding. 2 the CBR value of continuous graded crushed stone is 1. 51 times as much as that of compaction molding, and the modulus of springback is 1. 08 times that of vibratory molding, and the modulus of springback and CBR value are power function. In proportion to the product of maximum dry density and porosity, the CBR value of discontinuous graded macadam is 1.49 times of that of vibratory molding, and the modulus of springback is 1.05 times under compaction, and the modulus of springback and CBR is power function. In inverse proportion to the product of maximum dry density and porosity, the skeleton structure is the first factor to determine the mechanical properties of graded crushed stones. The results provide a theoretical basis for the prediction of the mechanical properties of graded crushed stones, and provide experimental support for the design of mix ratio and the determination of construction technology.
【作者单位】：安徽建筑大学土木工程学院;合肥工业大学交通运输工程学院;合肥市重点工程建设管理局;
【基金】：国家自然科学基金资助项目(51108150) 安徽高校省级优秀青年人才基金项目(2013SQRL046ZD) 安徽高校省级科学研究项目(KJ2013B063) 合肥市重点工程建设管理局科技项目(2011CGAZ1153)
【分类号】：U416.214;U414

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