鋼波紋涵管涵洞施工工藝流(liu)程可分(fen)為(wei)路堤(di)法(fa)和反(fan)開槽回(hui)填法(fa),下面主要先容后者,因其在施工過程中不影(ying)響路基施工整(zheng)體的進(jin)度,故以鋼(gang)波(bo)紋管涵洞的反(fan)開槽回(hui)填法(fa)為(wei)例說明。
鋼波紋涵管的耐久性及施工便利性優勢非常明顯
涵(han)洞(dong)兩側(ce)經(jing)由低洼積水(shui)地(di)(di)帶時.需要(yao)先設置圍堰、抽排(pai)積水(shui),必要(yao)時還需要(yao)清除換填(tian)部門(men)淤泥。進出口可(ke)采(cai)用(yong)(yong)由制(zhi)造的金屬(shu)波紋管(guan)節,有(you)直管(guan)和與路基邊坡同坡率(lv)的斜口兩種形(xing)式(shi);也(ye)可(ke)根據所在(zai)地(di)(di)區(qu)的詳細情況采(cai)用(yong)(yong)漿(jiang)砌片(pian)(pian)石或干砌片(pian)(pian)石砌筑。一般在(zai)嚴寒地(di)(di)區(qu),采(cai)用(yong)(yong)金屬(shu)波紋管(guan)節或干砌片(pian)(pian)石。
金(jin)(jin)屬波紋涵(han)管應用(yong)于公(gong)路養護工(gong)(gong)程時(shi)(shi),待涵(han)身及洞(dong)口主體部(bu)件運至(zhi)施工(gong)(gong)現場后,施工(gong)(gong)單位才能開(kai)始拆除舊(jiu)涵(han)洞(dong)的(de)工(gong)(gong)作,在拆除舊(jiu)涵(han)洞(dong)的(de)同時(shi)(shi),抓緊(jin)基(ji)礎材(cai)料的(de)備(bei)料工(gong)(gong)作,備(bei)料完(wan)成(cheng),并經(jing)檢修合格后方(fang)可進行基(ji)坑(keng)的(de)開(kai)挖工(gong)(gong)作。金(jin)(jin)屬波紋涵(han)管應用(yong)于新建公(gong)路工(gong)(gong)程時(shi)(shi),在定購涵(han)管的(de)同時(shi)(shi)可抓緊(jin)基(ji)礎材(cai)料的(de)備(bei)料和基(ji)坑(keng)的(de)開(kai)挖工(gong)(gong)作。
產品具有(you)工期短、重(zhong)量輕(qing)、裝置便當、耐久性好(hao)、工廠造(zao)價低、抗變形(xing)才能強、減少通車后養護(hu)成本等(deng)長處,由(you)其合適高寒凍土地(di)(di)域(yu),軟土路(lu)基地(di)(di)帶和深填土地(di)(di)帶,可儉省大量資金,具有(you)顯著的經濟效益。
涵洞(dong)的不均勻沉降是其損壞的主(zhu)要型式之一,鋼波紋管涵具有重量(liang)輕、安裝便當快捷、耐久性好、工程造價低(di)、抗變形(xing)才干強(qiang)、削減通(tong)車(che)后維護成本(ben)等特性。
鋼(gang)波紋(wen)(wen)(wen)(wen)管涵是(shi)選(xuan)用(yong)(yong)波紋(wen)(wen)(wen)(wen)狀管或由波紋(wen)(wen)(wen)(wen)狀板經由銜(xian)接(jie)、組(zu)裝(zhuang)構成的(de)(de)(de)一(yi)種涵洞(dong)方式。從材料與構造和功用(yong)(yong)的(de)(de)(de)本質關系上(shang)分(fen)析(xi),選(xuan)用(yong)(yong)柔(rou)性(xing)高強(qiang)度的(de)(de)(de)鋼(gang)波紋(wen)(wen)(wen)(wen)管涵洞(dong),不(bu)只具有(you)習(xi)氣(qi)地(di)(di)基(ji)與基(ji)礎(chu)變形的(de)(de)(de)才干,可以(yi)處理因地(di)(di)基(ji)基(ji)礎(chu)不(bu)均勻沉降致使的(de)(de)(de)涵洞(dong)損壞(huai)疑(yi)問,并且鋼(gang)波紋(wen)(wen)(wen)(wen)管涵洞(dong)因為軸向(xiang)波紋(wen)(wen)(wen)(wen)的(de)(de)(de)存(cun)在(zai)使其具有(you)的(de)(de)(de)受力(li)(li)特征(zheng),軸向(xiang)和徑向(xiang)一(yi)同分(fen)布因荷載(zai)招(zhao)致的(de)(de)(de)應(ying)力(li)(li)應(ying)變,可以(yi)更大水平上(shang)疏松荷載(zai)的(de)(de)(de)應(ying)力(li)(li)會集(ji),十分(fen)好(hao)地(di)(di)表現鋼(gang)構造的(de)(de)(de)上(shang)風。
鋼波紋涵管是替換圓管涵(han)、蓋(gai)板涵(han)、和小橋的優質公(gong)路(lu)建材。全體安(an)裝波紋管涵(han)的螺栓(shuan)起縱向銜接,螺栓(shuan)遭到的剪(jian)切效(xiao)果較小,能(neng)夠選用普通高強螺栓(shuan)即可。
但是(shi)理論選(xuan)用片(pian)狀波(bo)(bo)紋(wen)板(ban),并運用高強螺栓銜(xian)接組裝(zhuang)起來的(de)(de),因為規(gui)劃和現場施(shi)工的(de)(de)這一對(dui)對(dui)立的(de)(de)存在,決議了(le)其安裝(zhuang)施(shi)工的(de)(de)樞紐是(shi)鋼質波(bo)(bo)紋(wen)板(ban)材的(de)(de)環向銜(xian)接和軸向銜(xian)接的(de)(de)強度(du)能(neng)否(fou)與(yu)不考慮搭接頭(tou)的(de)(de)全體波(bo)(bo)紋(wen)管的(de)(de)強度(du)相不合(he),根據分片(pian)安裝(zhuang)波(bo)(bo)紋(wen)管涵的(de)(de)受力特(te)性及傳力特(te)征,聯(lian)絡有關鋼構造施(shi)工技術尺度(du),提出分片(pian)安裝(zhuang)波(bo)(bo)紋(wen)管涵螺栓規(gui)劃樞紐。
鋼制波(bo)紋(wen)(wen)管(guan)(guan)涵按安(an)裝(zhuang)(zhuang)辦法分為全體安(an)裝(zhuang)(zhuang)波(bo)紋(wen)(wen)管(guan)(guan)涵和分片(pian)安(an)裝(zhuang)(zhuang)波(bo)紋(wen)(wen)管(guan)(guan)涵。對公路涵洞(dong)來說,分片(pian)安(an)裝(zhuang)(zhuang)波(bo)紋(wen)(wen)管(guan)(guan)涵的(de)規劃(hua)過(guo)程(cheng)中休(xiu)止力學計算的(de)條件假定為:不考慮(lv)波(bo)紋(wen)(wen)管(guan)(guan)的(de)搭接頭,設(she)波(bo)紋(wen)(wen)管(guan)(guan)沿周向是均勻、接連、潤滑的(de).
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