高速公路隧道旧水泥混凝土路面抛丸施工技术研究

Research on Shot Blasting Construction Technology for Old Cement Concrete Pavement of Expressway Tunnels

当前的混凝土路面抛丸施工中的钢丸回收多为逐一收回,整体速度较慢,给后续的抛丸施工处理造成阻碍,影响路面的粗糙比。为此,本文提出高速公路隧道旧水泥混凝土路面抛丸施工技术,根据实际工程概况,先进行施工场地预清理及抛丸机调试,计算丸砂比,开展抛丸实践作业。之后采用多点位的方式清理场地内的废料,提升回收速度,实现钢丸多点位回收,并使用抛丸验收机工序交接来完成施工建设。结果表明:针对选定的6个测试区域,经过第一、第二抛丸施工测试阶段,最终路面的粗糙比均控制在2.3以下,这表明此次试验设计的旧水泥混凝土路面抛丸施工技术更为高效,具有一定的应用价值。

The steel shot recovery in current concrete pavement shot blasting construction is mostly carried out step by step,with a relatively slow overall speed,which hinders the subsequent shot blasting construction and affects the roughness ratio of the pavement.Therefore,this paper proposes the shot blasting construction technology for the old cement concrete pavement of highway tunnels.Based on the actual engineering situation,the construction site is pre cleaned and the shot blasting machine is debugged,the shot sand ratio is calculated,and the shot blasting practice operation is carried out.Afterwards,a multi-point approach is adopted to clean up the waste materials on the site,improve the recycling speed,achieve multi-point steel shot recycling,and use a shot blasting acceptance machine to complete the construction process handover.The results show that for the selected 6 test areas,after two stages of shot blasting construction testing,the final roughness ratio of the road surface is controlled below 2.3.It indicates that the shot blasting construction technology designed for this experiment is more efficient and has certain application value.