Finally , in response to the cavities beneath road slabs , 3d finite element analyses of pavment structures were conducted , the impacts on bearing capacity and life of pavements caused by cavities were analyzed , the reasons of early distresses were revealed ; also , in the aspects of pavement materials and structures , the measures and methods to prevent cavities were explored 最后,针对混凝土路面板板底脱空现象,对路面结构建立三维有限元模型,通过大量的有限元计算,分析了板底脱空对路面板承载力及使用寿命的影响,揭示了路面发生早期损坏的根本原因,并从路面材料和结构设计方面探讨了防止路面板脱空的措施和方法。
The work presented in this thesis is part of the research project - similitude laws and nondestructive diagnosis on concrete pavements , which is supported by china national science foundation . 9 slabs were tested to failure with factors of slab thickness , size ratio of geometrically similar slabs and loading place taken into account 本课题在国家自然科学基金项目“混凝土路面板相似理论与损伤诊断研究” (批准号59978015 )资助下，进行了不同厚度、不同几何相似比的9块刚性路面板的试验研究。
Through the experiment of the interfacial bonding shear strength and the shrinkage strain of concrete , the influence of the interfacial roughness of used concrete surface and interfacial bonding agent to interfacial bonding strength is revealed ; new concrete component and the shape and size of concrete slab are main factor affecting the shearing stress in layers 试验结果表明：老混凝土粘结面的粗糙度和界面粘结剂类型对新老混凝土界面粘结强度影响很大；新铺混凝土材料和混凝土路面板形状尺寸是影响新老混凝土粘结面收缩剪应力的主要因素。
