低水泥剂量稳定级配碎石基层典型结构分析

发布时间：2018-06-07 04:34

本文选题：低水泥 + 交通等级　；参考：《沈阳建筑大学学报(自然科学版)》2014年04期

【摘要】：目的找寻适应不同交通等级的合理的低水泥剂量基层沥青路面结构.方法拟定低水泥剂量级配碎石基层沥青路面结构,利用有限元软件计算以低水泥剂量稳定级配碎石取代半刚性基层后对弯沉、沥青层底拉应力等设计指标的影响,并结合交通荷载分析各结构层厚度组合合理性.结果轻交通等级下,推荐使用5 cm普通沥青混凝土面层+22 cm水泥质量分数为3%的低水泥剂量稳定级配碎石单基层;中交通等级下,推荐采用上基层厚度大于15 cm的水泥质量分数为2.5%的低水泥剂量稳定级配碎石,半刚性下基层厚度至少为20 cm结构组合形式;重交通等级下,推荐采用15 cm水泥质量分数为2.5%的低水泥剂量稳定级配碎石上基层和15 cm+20 cm半刚性双基层结构组合.结论在重、中交通荷载作用下,合理的低水泥剂量级配碎石基层能够在防治反射裂缝同时,较好地满足交通荷载需求.
[Abstract]:Objective to find a reasonable low cement dosage base asphalt pavement structure suitable for different traffic grades. The structure of asphalt pavement with low cement dose graded crushed stone base is designed and the influence of the design index on deflection and tensile stress of asphalt layer is calculated by the finite element software. According to the traffic load analysis, the thickness combination of each structure layer is reasonable. Under the light traffic grade, it is recommended to use the low cement dosage stable graded crushed stone single base with the 5 cm ordinary asphalt concrete surface +22 cm cement mass fraction of 3%. Under the middle traffic grade, it is recommended to use the low cement with the thickness of the cement with the thickness of 15 cm more than 15 cm at the base level. The dose Stabilized Graded Crushed Stone is at least 20 cm structure in the semi-rigid base. Under heavy traffic grade, it is recommended to use 15 cm cement mass fraction of 2.5% in low cement dosage Stabilized Graded Crushed Stone Base and 15 cm+20 cm semi-rigid double base structure combination. Conclusion under heavy and medium traffic load, reasonable low cement dose grade The macadam base can prevent and reflect the cracks at the same time, and better meet the traffic load demand.
【作者单位】：沈阳建筑大学土木工程学院;
【基金】：国家自然科学基金项目(51078242) 辽宁省交通厅重点科研项目(200914)
【分类号】：U416.217;U416.214

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