粗粒式建筑垃圾路基材料工程特性与应用研究

Study on Engineering Characteristics and Application of Coarse-Grained Construction Waste Subgrade Material

摘要: 为了确定碾压层厚度和碾压次数对粗粒式建筑垃圾填筑路基压实特性的影响，选用碾压层厚度为20 cm、30 cm和40 cm，碾压次数为8遍，每碾压一遍对其进行弯沉检测、压实度检测和颗粒级配分析，得到以下结论：碾压层厚度为20 cm、30 cm、40 cm的建筑垃圾路基分别在碾压4遍、5遍和7遍以后弯沉值达到稳定；不同碾压厚度下，最终压实度均大于96%，满足工程要求；碾压层厚度为20 cm时，与施工前相比，粗粒径占比明显下降，细粒料占比增加，过度碾压将对建筑垃圾粗粒料造成破坏，影响路基整体强度。

Abstract: In order to determine the influence of the thickness and times of rolling on the compaction characteristics of coarse-grained construction waste-filled subgrade, the thickness of rolling layer is 20 cm, 30 cm and 40 cm, and the rolling times is 8 times. The deflection detection, compactness detection and particle gradation analysis are carried out for each rolling time, and the following conclusions are obtained: The deflection value of construction waste subgrade with rolling layer thickness of 20 cm, 30 cm and 40 cm reaches stability after rolling for 4 times, 5 times and 7 times respectively; under different rolling thickness, the final compaction degree is greater than 96%, meeting the engineering requirements; when the thickness of the rolling layer is 20 cm, compared with that before construction, the proportion of coarse particle size decreases significantly and the proportion of fine aggregate increases. Excessive rolling will damage the coarse aggregate of construction waste and affect the overall strength of the subgrade.