钢桥面沥青铺装裂缝处治技术效果评价

Effect Evaluation of Treatment Technique for Cracking on Asphalt Steel Deck Surfacing

为了对钢桥面沥青铺装裂缝修复效果进行评价,通过沥青混合料小梁疲劳试验,分析无裂缝小梁和修复后小梁的疲劳性能以及不同裂缝槽口型式对修复后小梁疲劳性能的影响.试验表明,修复后小梁的极限弯拉强度与无裂缝小梁相比下降不明显,修复后小梁的疲劳寿命有较大程度下降;全断面修复使用性能较部分断面修复更为优异.不同槽口型式修复小梁试验结果表明,10 mm×10 mm、20 mm×10 mm槽口型式修复效果更佳.

In order to evaluate the effect of the crack treatment on asphalt steel deck surfacing,laboratory beam fatigue tests are conducted.The fatigue performances of undamaged beams and treated beams are researched respectively,and the influence of the types of different notches on the fatigue property of treated beams is also studied.It can be seen that the flexural-tensile strength of treated beams differ slightly,but the fatigue life reduces dramatically compared to that of undamaged beams.The service performances of the whole-section repaired beams have predominance to the part-section repaired one.The 10 mm×10 mm,20 mm×10 mm type notches lead to better repairing effect.