1、使用預(yu)拌混(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu):泵(beng)送(song)(song)中(zhong)的混(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)通常應(ying)該采(cai)用預(yu)拌混(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu),也可在現場設攪(jiao)拌站供(gong)(gong)應(ying)泵(beng)送(song)(song)混(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu),需要(yao)指出的是,手工(gong)(gong)攪(jiao)拌的混(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)不(bu)能進(jin)行泵(beng)送(song)(song)。同時在泵(beng)送(song)(song)中(zhong)應(ying)對供(gong)(gong)應(ying)的混(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)應(ying)以(yi)嚴(yan)格地控制(zhi),隨(sui)時注意坍落(luo)度的變(bian)化,對不(bu)符合泵(beng)送(song)(song)要(yao)求的混(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)不(bu)允許(xu)入泵(beng),以(yi)確保混(hun)(hun)(hun)凝(ning)(ning)土(tu)(tu)(tu)泵(beng)的工(gong)(gong)作。
2、專人進(jin)(jin)料(liao):在泵送混(hun)凝土(tu)過程(cheng)中,混(hun)凝土(tu)泵料(liao)斗上應該單(dan)獨設置篩網,同時(shi)設專人監視進(jin)(jin)料(liao),避免因直徑(jing)過大(da)的骨料(liao)或(huo)異物進(jin)(jin)入而造成堵塞。
3、避免(mian)管道振動(dong):在泵送過(guo)程中,通常料斗內的(de)混凝土存量(liang)不能(neng)低(di)于攪拌軸(zhou)位置,這樣主要是為了避免(mian)空氣(qi)進入泵管引起管道振動(dong)。
4、泵送中(zhong)斷時間(jian):如(ru)果混凝(ning)土(tu)的泵送需要(yao)(yao)中(zhong)斷,那么(me)一般(ban)中(zhong)斷時間(jian)不能(neng)超過1小時,同時要(yao)(yao)每隔(ge)5——10分(fen)進(jin)行反泵和正(zheng)泵運轉,以防(fang)止管(guan)道(dao)因(yin)混凝(ning)土(tu)泌水(shui)或坍落度(du)損失(shi)過大而堵管(guan)。
5、料斗及(ji)輸(shu)送(song)管道系統的(de)(de)清洗(xi):通(tong)常(chang)在(zai)混(hun)凝(ning)(ning)土(tu)泵送(song)完畢后,認真(zhen)清洗(xi)料斗及(ji)輸(shu)送(song)管道的(de)(de)系統。如果(guo)混(hun)凝(ning)(ning)土(tu)缸(gang)內的(de)(de)殘留(liu)混(hun)凝(ning)(ning)土(tu)清理不(bu)干凈(jing),就會出(chu)現在(zai)缸(gang)壁上固(gu)化的(de)(de)結(jie)果(guo),當活(huo)塞(sai)(sai)再次運行時(shi),活(huo)塞(sai)(sai)密封面就會直接承受(shou)缸(gang)壁上已固(gu)化的(de)(de)混(hun)凝(ning)(ning)土(tu)對(dui)其的(de)(de)沖(chong)擊,終(zhong)導致(zhi)推送(song)活(huo)塞(sai)(sai)的(de)(de)局(ju)部(bu)剝落。
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