作　　者： ; ; ;

机构地区： 北京交通大学土木建筑工程学院

出　　处： 《中国公路学报》 2007年第5期19-23,共5页

摘　　要： 以8种不同级配的粗粒土为研究对象,采用室内表面振动压实试验方法,研究粗粒土的级配特性与压实设备的振动频率、激振力对粗粒土压实特性的影响,并利用多元线性回归方法,分析土样级配特性对粗粒土压实效果的影响,最后建立粗粒土最大干密度与其级配特征粒径之间的关系式,并提出用5个特征粒径表示的级配特征函数。结果表明:级配不同的粗粒土在不同激振力、振动频率作用下,干密度-振动频率、干密度-激振力曲线形状几乎呈正态分布,存在最大干密度和对应的最佳振动频率、最佳激振力。 Directed against 8 kinds of coarse-grained soil with different gradations, through surface vibrated compaction test method in the lab, authors researched the effect of the gradation property of the coarse-grained soil, the vibration frequency and the excitation force of the compaction equipment on the compaction properties of coarse-grained soil. Using multi-linear regression method, the influence of gradation property of soil sample on compaction effect of coarse-grained soil was analyzed. In the end, the relational formula between the maximum dry density and its gradation characteristic granular diameter of coarse-grained soil was established, and the gradation characteristic function was put forward, which made the maximum dry density of the coarse-grained soil relate with its gradation properties directly. The results show that the relations between the dry density and the vibration frequency, the dry density and the excitation force of the coarse-grained soil are almost accord with normal distribution, which means that there are optimum vibration frequency and optimum excitation force for different coarse-grained soils.

关 键 词： 道路工程 粗粒土 试验研究 路基振动压实特性 级配特征函数

领　　域： [交通运输工程]