公路桥面伸缩缝长期以来较难处理。间隙小时(20mm左右)槽口下面垫以棕绳,上面用沥青填充,较难防水,沥青高出路面成台阶。亦有在30mm间隙时,两端用铸铁构件由螺栓与桥面板联结,在槽口中放入∧形氯丁橡胶条,用环氧树脂封口,亦不很理想。伸缩量再大,活动距离达到100～300mm,常用梳形板,其连接螺栓或铆钉常易松动断裂,维修困难。郑州 Highway bridge expansion joints have long been more difficult to deal with. Gap hours (20mm or so) under the slot pad with brown rope, filled with asphalt above, more difficult to waterproof, asphalt pavement above the road. Also in the 30mm gap, both ends of the cast iron member by the bolt and bridge deck coupling, put Λ-shaped neoprene in the notch, sealed with epoxy resin is not very satisfactory. The amount of expansion and then large, the activities of up to 100 ~ 300mm, commonly used comb-shaped plate, the connecting bolts or rivets often easy to break, maintenance difficult. Zhengzhou