旧水泥混凝土路面沥青罩面改造研究

【作者】 卢雄强；

【导师】 王昌衡； 刘代全；

【作者基本信息】 湖南大学 ， 建筑与土木工程， 2003， 硕士

【摘要】 本文在调查了解国内许多旧路改造实践工程的前提下，基于中山市博爱一路的改造实践，对旧水泥混凝土路面沥青罩面改造进行了系统的分析研究。主要的研究内容包括： (1)原有路面结构性能的评估 在沥青混凝土加铺罩面之前对旧水泥混凝土路面的损坏情况和结构状况进行正确的评价是解决反射裂缝和保证加罩成功至关重要的一环，其前提就是要了解旧水泥混凝土路面的结构特性对沥青罩面层中的应力和反射裂缝的影响。本文利用三维有限元分析程序——ADINA分析旧水泥混凝土路面结构特性对沥青罩面结构荷载应力状况的影响，对各种病害进行了详细的分析，并提出相应的处理措施。 (2)旧水泥混凝土路面沥青罩面改造中沥青罩面层的设计 旧路改造的罩面设计方法不仅涉及旧路面的损坏、结构状况、交通状况、环境因素，而且还需要合适的力学分析模型、正确的材料参数、有效的防反射裂缝措施等，内容广泛、复杂多变，至今尚未有成熟的设计方法。本文介绍了目前相对成熟的几种罩面设计体系，并加以评析，提出今后尚需研究的问题，为促进我国对考虑反射裂缝的旧水泥混凝土路面上沥青罩面设计方法的研究提供参考。 (3)反射裂缝的防治与控制 通过对反射裂缝的产生机理进行详细的分析，研究土工布和玻璃纤维格栅在防治与控制反射裂缝中的作用机理，对其施工工艺进行详细的介绍，并对比研究了土工布和玻璃纤维格栅在旧路面改造工程中的优劣。更多还原

【Abstract】 Based on understanding of many practices of asphalt overlay on old cement concrete pavement in our country and rehabilitation of Boai road in Zhongshan city, this paper analyzes and studies the rehabilitation technology of old cement concrete pavement systematically, includes:(1) The assessment for structure characteristic of old cement concrete pavementA correct assessment for pavement distress and structure characteristic of old cement concrete pavement before overlay is the stick point of preventing reflection cracking and guarantee the success of rehabilitation, which requires understanding how the structure characteristic of old pavement effects the stress and reflection cracking of the asphalt overlay. This paper analyzes how structure characteristic of old concrete pavement affects the load stress of asphalt overlay by the three dimensions finite element analysis program-ADINA.(2) The asphalt overlay design in rehabilitation of old cement concrete pavementAsphalt overlay design not only relates the distress, structure characteristic, traffic and environment of the old pavement, but also requires reasonable mechanics model, correct material parameter, effective measure of preventing reflection cracking, and so on. So there is still not a matured design method up to now. This paper introduces several relatively matured design methods and puts forward some problems which require more study. This purpose is to accelerate the study of asphalt overlay design in our country.(3) The prevention and control of reflection crackingBy detailed analysis of generation mechanism of reflection cracking, this paper also studies the principle respectively how the geotextile and glass fiber grid prevents and controls reflection cracking, and introduces their construction crafts in detail. Their advantages and shortcomings are also analyzed comparatively in this paper.更多还原