公路桥梁伸缩缝设备是以聚氨酯为主要资料,由防水聚合物密封资料组成,设备于梁缝处,与梁端混凝土粘结,并通过自身的伸缩变形来习惯梁端伸缩。PU伸缩缝充分利用了聚氨酯资料的强粘结性,胶体聚氨酯资料具有突出的形状习惯性和流动性。
宝鸡公路桥梁伸缩缝如何确保发挥好的效果呢?
必要时,还应依据设备时的环境温度调整毛勒伸缩缝的钢梁间隔。应将型公路桥梁伸缩缝慢慢放入槽内,使缝中心线与实践预留缝中心线相重合,差错不得超越10mm,一起使钢边梁内边坚持垂直,施工不科学合理。
施工过程中,梁端伸缩缝间距没有按设计要求完成,人为地放大和缩小,定位角钢方位不正确,致使伸缩设备不能正常作业。这样会呈现下列情况:由于缝距太小,橡胶伸缩缝因超限挤压凸起而发生跳车;由于缝距过大,荷载效果下的剪切力以及车辆行驶的惯性,会将松动的伸缩缝橡胶带出定位角钢,发生了另一类型的跳车。
During the construction, the spacing of expansion joints at the beam end was not completed according to the design requirements, artificially enlarged and reduced, and the orientation of positioning angle steel was incorrect, so that the expansion equipment could not operate normally. In this way, the following situations will occur: due to the small joint distance, the rubber expansion joint jumps due to over limit extrusion and bulge; Due to the large joint distance, the shear force under the load effect and the inertia of the vehicle, the loose expansion joint rubber will be brought out of the positioning angle steel, resulting in another type of jumping.
宝鸡公路桥梁伸缩缝如何确保发挥好的效果呢?
施工时伸缩设备的锚固钢筋焊接的不行牢固,或发生遗漏预埋锚固钢筋的现象,给伸缩缝自身形成隐患;施工时伸缩设备设备的不好,桥面铺装后伸缩缝浇筑的不好,运用过程中,在反复荷载效果下致使伸缩缝损坏。
公路桥梁伸缩缝能习惯各种形状的作业空间,不需依据胀大缝实践宽度量身定做,具有突出的施工性能,全体结构合理,质量简单操控,施工简便。砼振捣密实后,用抹板搓出水泥浆,分4-5次按惯例抹压平坦停止。这道工序应特别注意平坦度,砼面比沥青路面的顶面略低28-29mm为宜,过高或过低都会形成跳车现象。http://www.hbyanye.com/