為保證中間不留空(kong)隙(xi),應(ying)在兩(liang)接頭端頭處做好(hao)標記。做好(hao)后要用膠帶包裹嚴密,以防漏漿。能解決北(bei)方寒冷地(di)(di)區(qu)(霜凍)對(dui)橋梁和管涵(han)砼結構(gou)的破壞問題,使路表(biao)面沒有伸縮(suo)縫,提高行(xing)車舒適性(xing),有利于(yu)改善(shan)軟土地(di)(di)基結構(gou)與路堤(di)交界(jie)處的[錯(cuo)臺(tai)"現象,提高行(xing)車性(xing),鋼波紋(wen)涵管(guan)的工后營運,養護(hu)成本低,工程實際造(zao)價(jia)也低于同(tong)類(lei)跨徑(jing)的橋梁(liang).拆模時注意保護(hu)端頭處外漏(lou)的波紋管。
公路鋼波紋涵管有效提升行車(che)的舒適性(xing)
澆筑砼時(shi),不(bu)能(neng)(neng)對著波(bo)(bo)紋(wen)管(guan)放料。振搗(dao)(dao)(dao)棒(bang)不(bu)能(neng)(neng)與波(bo)(bo)紋(wen)管(guan)碰(peng)撞,嚴(yan)禁(jin)兩(liang)個振搗(dao)(dao)(dao)棒(bang)夾著一根波(bo)(bo)紋(wen)管(guan)振搗(dao)(dao)(dao)。特別是腹板振搗(dao)(dao)(dao)時(shi),嚴(yan)禁(jin)振搗(dao)(dao)(dao)棒(bang)在(zai)同一位置長時(shi)間振搗(dao)(dao)(dao),振搗(dao)(dao)(dao)時(shi)間以不(bu)超過20秒為準。波(bo)(bo)紋(wen)管(guan)接頭(tou)的方法(fa):波(bo)(bo)紋(wen)管(guan)接頭(tou)處要外(wai)包0.3米(mi)長的大號波(bo)(bo)紋(wen)管(guan),并且兩(liang)端頭(tou)要對半擰緊,中間不(bu)得留有空隙。
內徑100毫米金屬波紋管圓管
對比鋼(gang)筋砼(tong)拱涵(han)(han),鋼(gang)波紋(wen)管涵(han)(han)具(ju)有以下優勢:對地(di)基要(yao)求低(di),由于(yu)鋼(gang)波紋(wen)管涵(han)(han)為柔性結構(gou)物,其(qi)基礎一般也為柔性基礎,涵(han)(han)洞基底(di)(di)的沉降和(he)兩側路基的沉降是均勻的,所以在涵(han)(han)洞構(gou)筑時不(bu)必單獨對鋼(gang)波紋(wen)管的基底(di)(di)進行處理.切割波紋(wen)管要(yao)平直(zhi),不(bu)能切成斜口。
搬(ban)運到現場的波紋管(guan)要集中堆放(fang)整(zheng)齊,不(bu)能(neng)(neng)在(zai)波紋管(guan)上(shang)踩(cai)踏。波紋管(guan)要覆蓋保護(hu),防(fang)止風吹雨淋使其提前老化。考慮(lv)到頂板波紋管(guan)數量在(zai)逐漸減少(shao),但凡與波紋管(guan)沖(chong)(chong)突(tu)的部件都要避讓波紋管(guan)。每道厚約1.5mm,瀝青(qing)(qing)涂(tu)抹需在(zai)回填之(zhi)前進(jin)行,該措施也可(ke)增強(qiang)涵洞(dong)的防(fang)水功能(neng)(neng),對腐(fu)蝕及沖(chong)(chong)刷(shua)較為(wei)嚴重的場合(he),除在(zai)外(wai)壁(bi)增加(jia)2道熱涂(tu)瀝青(qing)(qing)層外(wai),可(ke)考慮(lv)在(zai)管(guan)內(nei)壁(bi)包(bao)裹一層C25細石(shi)砼(tong),更能(neng)(neng)加(jia)強(qiang)涵洞(dong)受水流沖(chong)(chong)刷(shua)的能(neng)(neng)力.
焊接鋼(gang)筋靠近(jin)波(bo)紋(wen)管時,要(yao)(yao)采取措施(shi)保護波(bo)紋(wen)管不能(neng)被(bei)灼(zhuo)傷,如(ru)果不小(xiao)心被(bei)灼(zhuo)傷到,灼(zhuo)傷處(chu)要(yao)(yao)用(yong)(yong)膠帶包裹嚴密。波(bo)紋(wen)管位(wei)置定位(wei)要(yao)(yao)準確,尤其是靠近(jin)接頭的(de)部位(wei),波(bo)紋(wen)管定位(wei)鋼(gang)筋間距為0.5米(mi),不能(neng)缺少。該文例舉的(de)鋼(gang)波(bo)紋(wen)管涵平(ping)均每(mei)延(yan)米(mi)的(de)造價比同等(deng)規(gui)格的(de)拱涵低(di)3000元左(zuo)右,而高填方的(de)路段往往涵洞(dong)較長,因此,采用(yong)(yong)鋼(gang)波(bo)紋(wen)管涵能(neng)夠節約較多造價,若考慮(lv)到鋼(gang)波(bo)紋(wen)管涵的(de)施(shi)工便利以及地基處(chu)理等(deng)方面可(ke)能(neng)節約的(de)成本,則其經(jing)濟性(xing)更為可(ke)觀.(hanihanbj.com)
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