在安(an)裝(zhuang)長春檢查井的過程涉及到下管(guan)，就(jiu)好(hao)像水泥管(guan)在安(an)裝(zhuang)也有下管(guan)這個環(huan)節，本(ben)文主要說(shuo)一下人工下管(guan)的方法，人工下管(guan)先將(jiang)繩索的一端拴固在地(di)錨(mao)(或(huo)其它牢固的樹木(mu)(mu)或(huo)建筑物上(shang)，拉(la)住繞過水泥管(guan)的另一端，并在溝(gou)邊斜放滑(hua)木(mu)(mu)至(zhi)溝(gou)底，用(yong)撬棍將(jiang)水泥管(guan)移(yi)至(zhi)溝(gou)邊，再慢慢地(di)放繩，使管(guan)沿著滑(hua)木(mu)(mu)滾(gun)下。
在(zai)將管(guan)(guan)(guan)(guan)(guan)(guan)(guan)材從(cong)地面放入(ru)溝槽內。下(xia)(xia)(xia)(xia)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)的方(fang)(fang)法分(fen)為人(ren)工(gong)下(xia)(xia)(xia)(xia)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)及機械下(xia)(xia)(xia)(xia)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、集中(zhong)下(xia)(xia)(xia)(xia)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)分(fen)散下(xia)(xia)(xia)(xia)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)、單(dan)節下(xia)(xia)(xia)(xia)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)和(he)組(zu)合下(xia)(xia)(xia)(xia)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)等幾種。下(xia)(xia)(xia)(xia)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)方(fang)(fang)法的選擇可根據水泥管(guan)(guan)(guan)(guan)(guan)(guan)(guan)口徑(jing)(jing)的大小、管(guan)(guan)(guan)(guan)(guan)(guan)(guan)道長(chang)度和(he)重量、管(guan)(guan)(guan)(guan)(guan)(guan)(guan)材和(he)接(jie)口強度，溝槽和(he)現場情況(kuang)及擁(yong)有的機械設備(bei)等條件(jian)而定。當管(guan)(guan)(guan)(guan)(guan)(guan)(guan)徑(jing)(jing)較小、重量料輕時，一般采(cai)用人(ren)工(gong)下(xia)(xia)(xia)(xia)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)。
值得施工(gong)方(fang)注意的是施工(gong)要求企業座(zuo)漿與豎縫灌漿都要飽滿，保證裝(zhuang)配構件結構堅(jian)固(gu)，防滲(shen)(shen)性好。漿縫如不灌實，將出(chu)現裂縫，產生滲(shen)(shen)漏，污(wu)染(ran)水質等(deng)問(wen)題，都要引起(qi)大家的重(zhong)視。
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