板底脱空条件下连续配筋水泥混凝土路面的静载力学分析  

Static Load Stress Analysis of Continuously Reinforced Concrete Pavement with Cavities beneath Slab

作　　者：何秄僷[1,2] 何斌[3] 叶茂[2] 白桃[2] 

机构地区：[1]湖北职业技术学院,孝感市432000 [2]武汉工程大学交通研究中心,武汉市430073 [3]中交第二公路勘察设计研究院有限公司,武汉市430056

出　　处：《公路》2016年第1期47-52,共6页Highway

基　　金：湖北省自然科学基金青年项目;项目编号2014CFB772;湖北省交通运输科技项目;项目编号2011-700-3-3;武汉工程大学科学研究基金;项目编号K201408

摘　　要：为研究板底脱空对连续配筋水泥混凝土路面的受力影响,采用有限元方法进行静载力学建模分析。数值分析结果表明:CRCP板体应力跟基层脱空深度没有明显关系,而与基层脱空范围和板体裂缝宽度关系密切。CRCP的临界荷位随着脱空范围的变化发生改变,取决于脱空范围与轮载的相对位置。当板体脱空为边缘小范围脱空时,对其受力几无影响;而当板体脱空跨越一般行车轮迹带外缘时,CRCP需要进行基层脱空的工程处理。基层脱空下超载会引发CRCP极为不利的内力反应,需严格控制。In order to investigate the influence of pavement suspending on the stress of Continuously Reinforced Concrete Pavement （CRCP）, finite element method is applied to model the reactions of pavement to wheel load. Numerical analysis shows that the void size beneath slab and the crack width instead of the void depth have close relevance with the stress of CRCP. The critical load position of CRCP is completely depending upon the relative position between the void range and the wheel load track. Stress of CRCP will not change if the cavity beneath slab is narrow near the pavement edge. However, the change would be magnified significantly when the void range step cross the normal wheel load track, which is the time for reinforcement. CRCP will suffer the toughest situation if the overloaded vehicle acts on the slab with cavity underneath, and the overloaded vehicles should be strictly forbidden.

关 键 词：连续配筋水泥混凝土路面 脱空 有限元 荷载应力 

分 类 号：U416.216[交通运输工程—道路与铁道工程]