鋼波(bo)紋涵管涵洞施(shi)(shi)工(gong)(gong)前準備相關(guan)材料,人員(yuan)及設備進場,并做好施(shi)(shi)工(gong)(gong)時期的安全防護(hu)工(gong)(gong)作,對路基邊(bian)坡進行圍網保(bao)護(hu),防止石塊等物體下滑傷人。
基礎處理:可回填(tian)砂(sha)(sha)礫(li)或砌筑片石砼,對基底進(jin)行(xing)平整(zheng),換填(tian)30-50cm厚的砂(sha)(sha)礫(li)材料,密實度達(da)到90%以上,選(xuan)擇適當的流(liu)水縱坡3%左右,定出(chu)每道(dao)涵(han)的中線(xian)和邊線(xian)。
鋼波紋涵管(guan)(guan)(guan)(guan)施(shi)(shi)工(gong)時,采用(yong)分段施(shi)(shi)工(gong)的方法,預先在原拱涵基底用(yong)角鋼并排兩(liang)根,長(chang)度(du)根據涵長(chang)確定,作涵管(guan)(guan)(guan)(guan)推進(jin)時的滑軌,波紋涵管(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)徑(jing)根據工(gong)程需(xu)要可有不同的規(gui)格,整(zheng)裝管(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)徑(jing)為0.5m-2.5m,每(mei)節長(chang)度(du)3.06米(mi),采用(yong)內(nei)(外)法蘭(lan)螺栓連接(jie),拼裝管(guan)(guan)(guan)(guan)管(guan)(guan)(guan)(guan)徑(jing)為3m-8m,板與板搭(da)接(jie)高(gao)強螺栓緊固(gu)。
如果涵(han)長小于(yu)30米(mi),波紋管涵(han)兩側與原涵(han)寬度大(da)于(yu)80cm,可將整道波紋管涵(han)在(zai)下游或上游向一端推進,就位以后,再(zai)進行一端擋墻的砌筑(zhu),四周的回(hui)(hui)填(tian)工作(zuo),可回(hui)(hui)填(tian)沙礫、碎石(shi)(shi)(shi)土、砌筑(zhu)片石(shi)(shi)(shi)等。頂部(bu)采用砌片石(shi)(shi)(shi)或高壓泵送膨脹水泥砂漿。
如果涵(han)長大于(yu)30米,鋼波(bo)紋(wen)(wen)(wen)涵(han)管(guan)(guan)(guan)兩側與原涵(han)寬度小于(yu)80cm,可(ke)將(jiang)3m-6m長涵(han)管(guan)(guan)(guan)在(zai)下游或上(shang)游向一端(duan)(duan)推進,就位(wei)以后可(ke)以將(jiang)其(qi)固定,砌筑頂(ding)端(duan)(duan)的(de)(de)片石端(duan)(duan)墻,波(bo)紋(wen)(wen)(wen)管(guan)(guan)(guan)涵(han)的(de)(de)另一端(duan)(duan)與涵(han)洞(dong)間的(de)(de)間距用沙袋或漿(jiang)砌片石擋住,寬度50cm,然后開始回(hui)填。兩側可(ke)用粗沙水密法密實或澆(jiao)注混凝土(tu)震動棒搗實。頂(ding)部采用高壓泵送膨脹水泥(ni)沙漿(jiang)。該節管(guan)(guan)(guan)四周填筑完(wan)(wan)畢(bi)后,將(jiang)第(di)二節運至,進行兩管(guan)(guan)(guan)的(de)(de)連(lian)接(jie)(jie),連(lian)接(jie)(jie)完(wan)(wan)畢(bi)后,以上(shang)述相同的(de)(de)方法進行回(hui)填,依此(ci)順(shun)序完(wan)(wan)成管(guan)(guan)(guan)道鋼波(bo)紋(wen)(wen)(wen)涵(han)管(guan)(guan)(guan)的(de)(de)修建工作。
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