基于裂缝宽度统计的水稳碎石微裂技术试验研究

发布时间：2019-02-19 20:33

【摘要】：在解决半刚性基层收缩裂缝问题上,水泥稳定碎石基层微裂技术在我国一直处于研究与发展的初期阶段。通过研究振动压实仪的振动时间与无侧限抗压强度降低百分率之间的关系,确定了微裂程度与振动时间的对应关系;利用裂缝宽度检测仪观测和读取微裂后试件表面的微裂缝宽度值,并借助SPSS软件对实测微裂缝宽度值数据进行处理与统计分析。研究表明:通过描述性统计分析确定出不同微裂程度下微裂缝宽度值的分布范围,为水泥稳定碎石基层微裂技术提供了定量关系的理论参考;同时利用单变量多因素方差分析(UNIANOVA)研究微裂程度与材料结构类型对微裂缝宽度值影响显著性,得出微裂程度对于微裂缝宽度值影响显著,而材料的结构类型对于微裂缝宽度值无显著性影响。
[Abstract]:In order to solve the problem of shrinkage crack of semi-rigid base, the micro-crack technology of cement stabilized macadam base has been in the initial stage of research and development in China. By studying the relationship between the vibration time of the vibratory compaction instrument and the reduction percentage of the unconfined compressive strength, the corresponding relationship between the microcrack degree and the vibration time is determined. The micro-crack width on the surface of micro-crack specimen was observed and read by using the crack width detector, and the data of the measured micro-crack width was processed and statistically analyzed by SPSS software. The results show that the distribution range of microcrack width under different microcrack degree is determined by descriptive statistical analysis, which provides a theoretical reference for the quantitative relationship of micro-crack technology of cement stabilized crushed stone base. At the same time, the single variable multivariate analysis of variance (UNIANOVA) was used to study the effect of microfracture degree and material structure type on the microcrack width, and it was concluded that the microfracture degree had a significant effect on the microcrack width. However, the structure type of material has no significant effect on the width of microcrack.
【作者单位】：河北工业大学土木与交通学院;
【分类号】：U416.214

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