水泥路面加铺单层沥青混合料施工关键技术研究

发布时间：2018-03-28 14:56

本文选题：施工工艺　切入点：摊铺技术　出处：《长安大学》2017年硕士论文

【摘要】：水泥路面具有刚度大、荷载扩散能力强、稳定性好的特点,因而成为高等级公路路面结构的主要类型之一。截至2014年,我国水泥路面占全部有铺装路面的比例为73.5%。水泥路面存量巨大,其中一些路面由于接近设计寿命、路面病害等原因而面临着养护和改造的现状。水泥路面加铺沥青层通常采用两层或三层加铺结构,茂湛高速公路采用6cm单层沥青加铺结构,存在反射裂缝防治、平整度控制、压实度控制等施工技术难点,为此开展以下四个方面的研究工作。首先,研究了水泥路面加铺沥青混合料反射裂缝产生机理,分析了三种类型防治技术的原理及优缺点,针对玻纤格栅防治反射裂缝进行了疲劳模拟试验。其次,研究了沥青加铺层平整度传递的影响因素,在此基础上推导出沥青加铺层平整度的标准差数学模型,并分析了4种自动找平系统基准的特性。再次,针对茂湛高速公路加铺工程制定了相应的施工工艺,在施工过程中采用施工温度监测、摊铺振动频率监测、压实设备速度-振动频率匹配监测、初始密实度监测等作业质量控制技术;并在深汕高速公路加铺项目进行了相应的试验。最后,对依托工程茂湛高速公路加铺项目进行了工后检测和通车半年后检测,检测结果评级为优。
[Abstract]:Cement pavement is one of the main types of high grade highway pavement structure because of its high stiffness, load diffusion ability and stability. As of 2014, The proportion of cement pavement in China is 73.5. the stock of cement pavement is huge, some of which are close to the design life. Pavement diseases and other reasons are faced with the status quo of maintenance and reconstruction. Cement pavement overlay asphalt layer usually adopts two or three layers overlay structure, Mao-Zhan highway adopts 6cm single-layer asphalt overlay structure, there are reflective cracks prevention and control, flatness control, etc. For this reason, the following four aspects of the research work are carried out. Firstly, the mechanism of reflective cracks of cement pavement overlay asphalt mixture is studied, and the principles, advantages and disadvantages of the three types of prevention techniques are analyzed. The fatigue simulation test of glass fiber grille for preventing reflective cracks is carried out. Secondly, the factors affecting the smoothness transfer of asphalt overlay are studied, and the mathematical model of standard deviation of asphalt overlay smoothness is derived. The characteristics of four kinds of datum of automatic leveling system are analyzed. Thirdly, the corresponding construction technology is established for the overlay project of Mao-Zhan Expressway. In the process of construction, temperature monitoring and spreading vibration frequency monitoring are adopted. The operation quality control techniques such as velocity-vibration frequency matching monitoring, initial compactness monitoring of compaction equipment are carried out, and the corresponding tests are carried out in the overlay project of Shen-Shantou Expressway. The overlay project of Mao-Zhan Expressway was tested after work and half a year after opening to traffic, and the test result was excellent.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U416.2

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