旧水泥混凝土路面沥青罩面结构设计方法及典型结构研究

发布时间：2018-04-21 20:46

本文选题：设计方法 + 板长　；参考：《长安大学》2014年硕士论文

【摘要】：目前旧水泥路面加铺沥青罩面结构设计准则并不能很好的控制路面的使用性能，罩面加铺层结构设计方法仍存在缺陷。另外，设计规范中对防止反射裂缝的措施没有给出具体的应用条件和范围，只是一些基本原则，缺乏具体的技术标准和要求，失去了规范的指导作用。本论文研究基于旧水泥路面板病害特征的罩面结构设计方法及沥青罩面典型结构，主要研究成果如下： 1、研究基于旧混凝土板长的罩面结构设计方法，提出了当旧混凝土开裂板板长较长时，沥青罩面层的经济合理加铺厚度在14~18cm之间，而开裂板板长较小时，采用直接加铺沥青面层是比较不利的。 2、研究基于板间错台量的沥青罩面结构设计方法，得出板间错台量的增大将显著增加沥青罩面层层底的应力，因此，在进行旧混凝土板沥青罩面设计时，应尽量减小两块板间的错台量，最好不超过0.5cm。 3、研究旧水泥路面沥青罩面层的防反射裂缝措施，，得出在相同荷载作用下应力吸收层缓解应力集中的效果远远优于应力吸收膜；应力吸收层厚度在2.5~3cm之间，模量范围介于300~500MPa时，将具有较显著的减小应力集中、延缓裂缝发展的效果。 4、通过对广东地区典型湿热气候、交通及路基强度特征的分析，提出了适于广东地区旧水泥混凝土路面采用的沥青罩面典型结构。
[Abstract]:At present, the design criterion of asphalt overlay structure of old cement pavement can not control the performance of pavement well, and the design method of overlay structure is still defective. In addition, the design code does not give specific conditions and scope of application for the measures to prevent reflective cracks, but only some basic principles, lack of specific technical standards and requirements, and lose the guiding role of the specifications. In this paper, the design method of the overlay structure based on the disease characteristics of the old cement pavement panel and the typical structure of the asphalt overlay are studied. The main results are as follows: 1. The design method of overlay structure based on the length of old concrete slab is studied. When the length of cracked slab of old concrete is longer, the economical and reasonable overlay thickness of asphalt overlay is between 14~18cm and the length of cracked slab is smaller. It is unfavorable to use the direct overlay of asphalt. 2. The design method of asphalt overlay based on the amount of stagger between plates is studied. It is concluded that the stress of asphalt overlay will be significantly increased with the increase of the amount of stagger between plates. Therefore, in the design of asphalt overlay of old concrete slab, The error between the two boards should be minimized, preferably not to exceed 0.5 cm. 3. The measures of anti-reflection crack of asphalt overlay on old cement pavement are studied. It is concluded that the stress absorption layer is much better than the stress absorption film in relieving stress concentration under the same load, and the thickness of the stress absorption layer is between 2.5~3cm and the modulus is in the range of 300~500MPa. The stress concentration will be significantly reduced and the fracture development will be delayed. 4. Based on the analysis of typical humid and thermal climate, traffic and roadbed strength in Guangdong area, the typical asphalt overlay structure suitable for the old cement concrete pavement in Guangdong area is put forward.
【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】：U416.2

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