鋼波紋涵(han)管涵(han)洞施(shi)工(gong)前準(zhun)備相關材料,人(ren)員及設備進(jin)(jin)場,并做好施(shi)工(gong)時期(qi)的安全(quan)防(fang)護工(gong)作,對(dui)路基邊坡(po)進(jin)(jin)行圍網保(bao)護,防(fang)止石塊等(deng)物體下滑傷人(ren)。
基(ji)礎處理(li):可(ke)回填(tian)砂(sha)礫或砌筑片(pian)石砼,對基(ji)底進(jin)行平整,換填(tian)30-50cm厚的砂(sha)礫材(cai)料(liao),密實度達到90%以(yi)上,選擇(ze)適(shi)當的流水縱(zong)坡(po)3%左右(you),定出每道涵的中(zhong)線和邊線。
鋼波紋(wen)涵(han)管(guan)(guan)(guan)施(shi)(shi)工(gong)時(shi),采用(yong)分段施(shi)(shi)工(gong)的(de)方法,預(yu)先在(zai)原拱(gong)涵(han)基底用(yong)角鋼并(bing)排兩(liang)根,長(chang)(chang)度根據涵(han)長(chang)(chang)確定,作(zuo)涵(han)管(guan)(guan)(guan)推(tui)進時(shi)的(de)滑軌,波紋(wen)涵(han)管(guan)(guan)(guan)管(guan)(guan)(guan)徑(jing)(jing)根據工(gong)程(cheng)需(xu)要可(ke)有不同的(de)規格,整裝管(guan)(guan)(guan)管(guan)(guan)(guan)徑(jing)(jing)為(wei)0.5m-2.5m,每節長(chang)(chang)度3.06米,采用(yong)內(nei)(外)法蘭螺栓(shuan)連(lian)接(jie),拼裝管(guan)(guan)(guan)管(guan)(guan)(guan)徑(jing)(jing)為(wei)3m-8m,板(ban)與板(ban)搭(da)接(jie)高(gao)強(qiang)螺栓(shuan)緊固。
如果涵長小(xiao)于(yu)30米,波紋管涵兩側與原涵寬度大于(yu)80cm,可將整道波紋管涵在下游或上游向一端(duan)推進(jin)(jin),就(jiu)位以后,再進(jin)(jin)行(xing)一端(duan)擋墻的砌筑(zhu),四周的回填工(gong)作,可回填沙礫、碎(sui)石土(tu)、砌筑(zhu)片石等。頂部(bu)采用砌片石或高壓泵(beng)送膨(peng)脹水泥砂漿。
如果(guo)涵(han)(han)長大于30米,鋼波(bo)紋(wen)(wen)涵(han)(han)管(guan)(guan)兩側與(yu)原涵(han)(han)寬度小于80cm,可將3m-6m長涵(han)(han)管(guan)(guan)在下游或(huo)上游向一端推進,就位以后(hou)可以將其固定(ding),砌筑頂(ding)端的片(pian)石端墻,波(bo)紋(wen)(wen)管(guan)(guan)涵(han)(han)的另一端與(yu)涵(han)(han)洞間(jian)的間(jian)距(ju)用沙(sha)(sha)袋或(huo)漿砌片(pian)石擋住,寬度50cm,然后(hou)開始回(hui)填(tian)。兩側可用粗沙(sha)(sha)水(shui)密法(fa)密實或(huo)澆注(zhu)混凝土震動棒搗實。頂(ding)部(bu)采用高壓泵(beng)送(song)膨脹水(shui)泥沙(sha)(sha)漿。該節管(guan)(guan)四周(zhou)填(tian)筑完(wan)畢(bi)后(hou),將第二(er)節運至,進行(xing)兩管(guan)(guan)的連接,連接完(wan)畢(bi)后(hou),以上述(shu)相(xiang)同的方法(fa)進行(xing)回(hui)填(tian),依此順(shun)序(xu)完(wan)成管(guan)(guan)道鋼波(bo)紋(wen)(wen)涵(han)(han)管(guan)(guan)的修建工(gong)作(zuo)。
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