(一) 砼搅拌
1、人工上料,受料口处应设车挡,推车不得用力过猛和撒把,机械上料,人员不得靠近入料口。
2、人工搅拌或人工上料及搅拌机操作人员均应戴防尘口罩。
3、搅拌机运转中,严禁将工具、硬物等伸入筒内,不得将头靠近滚筒张望,也不得进入滑道处作业。
4、搅拌机运转中,料斗下方严禁站人,停止运转后,应将料斗放在地面或将保险钩挂牢。
5、清除筒内沉积物或检修搅拌机时,必须停机、断电。
6、使用刺激性、腐蚀性的砼外加剂时,操作人员应佩戴使用的特殊防护用品。
(二) 砼运输
1、用手推车运砼,装料不得过满,向料斗倒料应有挡车措施,卸料不得用力过猛和撒把。
2、用小型翻斗车直接倒料时,倒料平台应外低里高(5°左右坡度),并在沿口处设高度不低于15cm的车挡。车就位和倒料时,要缓慢。
3、泵送砼,输送前须试送,检修时须卸压。人工处理管道中堵塞的砼时,应卸压后进行,并应将身体偏离管口。
(三) 砼浇注
1、砼溜槽及串通节间必须连接牢固,不准站在溜槽帮上操作。
2、浇灌框架、梁、柱、墙,应站在操作台上,不得站在模板、支撑或脚手护栏上作业。
3、泵送砼应连续进行,管道严重堵塞时,禁止采用加大气压的办法排除故障。
4、使用震动棒应穿胶鞋,湿手不得接触开关,电源线不得破皮漏电。
5、预应力灌浆,应严格按规定压力进行,输浆管路畅通,阀门接头要严密牢固。
6、在砼中掺加毛石、块石时,应按规定地点抛石或用溜槽溜放。
7、浇捣拱形结构应自两边拱脚对称同时进行,浇圈梁、雨棚、阳台,应设防护措施;浇捣料仓,下口应先进行封闭,并铺设临时脚手架以防人员坠落。
(四) 砼养护
1、砼预留孔洞、基槽等处,应加盖或设警戒、警标。
2、蒸气养生,应设防护或标志;电热养生,测温时应先停电;用炉火加热养生,人员进入前需先通风。
3、不得在砼养生窑(池)壁上站立、行走,要停汽并充分降温后,人员方可进入养生窑(池)。
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