【摘要】 为准确有效地评定水泥混凝土路面的脱空状况,通过对现场贝克曼梁(BB)、落锤弯沉仪(FWD)、路面雷达(GPR)和钻芯取样检测结果的分析和计算,并充分参考梅观高速路面的实际情况,提出了以板角弯沉、横缝中点弯沉和接缝传荷系数3个指标作为水泥混凝土路面脱空的判断标准。研究表明:据此评判标准与方法判定的脱空状况与钻芯取样结果基本一致,对板底脱空情况判断的准确率高达86.7%,对脱空等级判断的准确率达到80%,说明该评定方法具有较高的准确度与可靠性,能够满足水泥混凝土路面板底脱空判别与评价的需要。更多还原

【Abstract】 In order to assess the void beneath cement concrete pavement slab accurately and effectively,through analyzing and calculating the test findings discovered by on-site Benkelman beam( BB),falling weight deflectometer( FWD),ground penetrating radar( GPR) and core-drilling sample,and considering the real pavement condition of Meiguan expressway,it is put forward that slab corner deflection,transverse joint midpoint deflection and joint load-transfer coefficient are verified to be the judgment criterion for void beneath cement concrete pavement slab. The result shows that the void condition acquired by this assessing criterion and method is essentially in agreement with the result of the core drilling sample,the judgment accuracy rate of void beneath slab reached 86. 7%,and the accuracy rate of void grades judgment reached80%,proving that this evaluation method is of high accuracy and reliability,it is able to meet the needs of judgment and evaluation of void beneath cement concrete pavement slab.更多还原