沥青路面就地热再生工程关键技术研究

发布时间：2018-06-25 10:54

本文选题：就地热再生 + 新料添加比例　；参考：《东南大学》2015年硕士论文

【摘要】：沥青路面就地热再生技术在我国较大规模投入应用已经有超过10年的时间。就地热再生是一项高度集成化的工程技术,其工程质量受其施工过程中的工艺参数影响较大。本文通过对现有就地热再生工程实际效果的调查,针对其中影响工程质量的关键因素进行了深入研究。首先对目前江苏省高速公路沥青路面就地热再生工程进行了大量的调查。通过数据分析了就地热再生对于路面平整度、车辙、抗滑指标的修复效果,以及针对SMA路面的适用性；对比了不同施工单位和不同加热设备的施工效果。其次对高速公路的车辙断面情况进行了激光扫描测量,回归分析了新料添加比例与车辙深度的关系,建立了基于车辙深度的就地热再生新料添加比例公式。采用Abaqus有限元计算研究了路面隆起部位对就地热再生加热效果影响,并根据研究结果对各等级公路给出了铣刨建议。通过实际调查分析和对比了不同裂缝处理方式的防裂效果和对平整度的影响。接着通过调研,检测了路面取芯芯样的各项指标并与实际路面的车辙指标进行相关性分析,由此看出现行取样方法的不合理性,在这一基础上提出了新的取样方法。现行的就地热再生混合料配合比设计方法并没有考虑实际施工过程中新料添加量的变化,在考虑这一问题的基础上提出了基于车辙深度变异性的配合比设计方法并进行了室内验证。最后通过室内试验模拟和研究了油石比、空隙率和层间水对于就地热再生加热效果的影响。指出现有规范中施工质量的检测指标主要集中在路面平整度等外观几何指标,对真正影响路面使用质量的指标缺少有效的检测方法和控制标准。,因此提出了新的再生厚度测试方法以检验就地热再生施工质量,并且这一方法通过实际工程进行了验证。
[Abstract]:It has been more than 10 years since asphalt pavement was put into use on a large scale in China. Geothermal regeneration is a highly integrated engineering technology, and its engineering quality is greatly affected by the technological parameters in the construction process. Based on the investigation of the actual effect of the geothermal regeneration project, the key factors affecting the engineering quality are studied in this paper. First of all, a large number of investigations have been carried out on the geothermal regeneration project of the asphalt pavement in Jiangsu Province. According to the data, this paper analyzes the repair effect of geothermal regeneration on pavement smoothness, rutting, anti-skid index, and the applicability of SMA pavement, and compares the construction effect of different construction units and different heating equipment. Secondly, the laser scanning measurement of rutting section of freeway is carried out, and the relationship between the proportion of new material and the depth of rutting is regressed, and the formula of adding new material for geothermal regeneration based on the depth of rutting is established. The effect of pavement uplift on the heating effect of geothermal regeneration is studied by using Abaqus finite element method, and suggestions for milling and planing of each grade highway are given according to the results of the study. Through actual investigation, the effect of crack prevention and the influence on smoothness of different crack treatment methods are analyzed and compared. Then through investigation and investigation, the coring samples of road surface are detected and the correlation analysis is carried out with the rutting index of actual pavement, which shows the irrationality of the current sampling method. On this basis, a new sampling method is put forward. The current design method for mixture ratio of geothermal reclaimed mixture does not take into account the change of the amount of new materials added in the actual construction process. On the basis of considering this problem, a matching ratio design method based on rutting depth variability is proposed and verified in laboratory. Finally, the effects of oil / stone ratio, porosity and interlayer water on the heating efficiency of geothermal regeneration were simulated and studied in laboratory. It is pointed out that the inspection indexes of construction quality in the existing codes mainly focus on the exterior geometric indexes such as pavement smoothness. There is a lack of effective testing method and control standard for the indexes that really affect the pavement quality. Therefore, a new method for measuring the thickness of the recycled pavement is put forward to test the construction quality of geothermal regeneration, and the method is verified by practical engineering.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.217

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