基于振动成型水泥稳定碎石基层材料设计研究

发布时间：2018-10-14 10:38

【摘要】：水泥稳定碎石基层由于其良好的路用性能，被广泛应用于我国公路建设中。但是，由于其对温度和湿度有较强的敏感性，引起沥青路面开裂，形成以反射裂缝为主的一系列病害，缩短沥青路面的使用寿命，降低了路面结构的可靠性，并在一定程度上制约我国公路交通事业的健康发展。近年来，随着我国交通的发展以及施工技术水平的提高，我国室内试验方法不能实际反映材料真实性能，因此，开展基于振动成水泥稳定碎石材料设计研究具有重要意义。论文通过分析振动压实原理以及振动压实仪工作原理，确定合理的振动参数。基于振动试验方法、逐级填充法以及I法确定多级嵌挤骨架密实级配，通过分形理论研究，提出将双动态平衡参数D-R作为振动法水泥稳定碎石级配评价指标。由振动击实法与重型击实法的对比分析表明，采用振动法确定的压实标准具有明显的优势。分析研究基于振动成型水泥稳定碎石抗压强度、劈裂强度与抗压回弹模量的力学特性，揭示各因素的影响规律，建立强度预估方程，并确定三者之间的线性关系。根据莫尔强度理论，分析研究水泥稳定碎石内摩阻角与粘结力，继而提出基于振动成型水泥稳定碎石结构评价指标，内摩阻比C=z/j，并确定C值的合理范围。运用劈裂疲劳试验，，建立水泥稳定碎石疲劳方程，根据相关系数进行理论修正。
[Abstract]:Cement-stabilized macadam base is widely used in highway construction because of its good road performance. However, due to its strong sensitivity to temperature and humidity, it causes cracking of asphalt pavement, forms a series of diseases, which are mainly reflected cracks, shortens the service life of asphalt pavement, and reduces the reliability of pavement structure. And to a certain extent restricts the healthy development of highway transportation in China. In recent years, with the development of traffic and the improvement of construction technology in our country, the indoor test method in our country can not actually reflect the real properties of materials. Therefore, it is of great significance to study the design of vibration-based cement stabilized macadam materials. By analyzing the principle of vibration compaction and the working principle of vibratory compaction instrument, the reasonable vibration parameters are determined in this paper. Based on the vibration test method, step by step filling method and I method, the multi-stage compacted skeleton dense gradation is determined. Through the study of fractal theory, the double dynamic equilibrium parameter D-R is proposed as the evaluation index of the vibrating cement-stabilized crushed stone gradation. The comparative analysis between the vibration compaction method and the heavy compaction method shows that the compaction standard determined by the vibration method has obvious advantages. Based on the mechanical properties of compressive strength, splitting strength and modulus of compressive resilience of vibration-forming cement-stabilized macadam, the influence law of various factors is revealed, and the prediction equation of strength is established, and the linear relationship between them is determined. Based on the Mohr strength theory, the internal friction angle and bond force of cement stabilized macadam are analyzed and studied, and then the evaluation index and internal friction ratio C ~ (z / j) of cement stabilized macadam structure based on vibration forming are put forward, and the reasonable range of C value is determined. The fatigue equation of cement stabilized macadam was established by splitting fatigue test.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.214;U414

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