舉例說明:采用鋼波紋管涵(han)洞可有(you)效(xiao)地(di)縮短(duan)(duan)工(gong)期!!!作(zuo)(zuo)為(wei)我(wo)國(guo)(guo)國(guo)(guo)民經濟發(fa)展的(de)基礎設施,公(gong)(gong)路在人們的(de)日常生活中(zhong)發(fa)揮極(ji)其重(zhong)要(yao)的(de)作(zuo)(zuo)用(yong);而(er)橋涵(han)工(gong)程(cheng)作(zuo)(zuo)為(wei)公(gong)(gong)路工(gong)程(cheng)中(zhong)重(zhong)要(yao)的(de)構造物,為(wei)公(gong)(gong)路跨越小(xiao)河流、山(shan)谷(gu)等(deng)(deng)天然或(huo)人工(gong)障礙(ai)物(如(ru)人行小(xiao)道、機耕(geng)通(tong)道或(huo)地(di)方道路),保(bao)證路基通(tong)暢,發(fa)揮著重(zhong)要(yao)的(de)作(zuo)(zuo)用(yong)。鑒于(yu)公(gong)(gong)路工(gong)程(cheng)具(ju)有(you)投資量大(da)、工(gong)期長、協作(zuo)(zuo)性高、影響因素(su)復雜等(deng)(deng)特點,采(cai)用(yong)鋼波(bo)紋管涵(han)洞可有(you)效(xiao)地(di)縮短(duan)(duan)工(gong)期,節省(sheng)造價(jia),公(gong)(gong)路工(gong)程(cheng)全線路基的(de)貫(guan)通(tong)奠定了堅實的(de)基礎。
采用鋼波紋管涵洞可有效地縮短工期
公路(lu)涵洞(dong)(dong)中(zhong),涵洞(dong)(dong)的不(bu)(bu)均(jun)勻沉(chen)降是其破壞(huai)的主(zhu)要(yao)形式(shi)之一。從材料與結(jie)構(gou)和(he)功能的本質關系上(shang)分析,采用柔性、高強度的鋼(gang)波(bo)紋(wen)(wen)(wen)管涵洞(dong)(dong),不(bu)(bu)僅具(ju)有適應地基(ji)與基(ji)礎(chu)變形的能力(li),可(ke)以(yi)解決因地基(ji)基(ji)礎(chu)不(bu)(bu)均(jun)勻沉(chen)降導致的涵洞(dong)(dong)破壞(huai)問題;而(er)且鋼(gang)波(bo)紋(wen)(wen)(wen)管涵洞(dong)(dong)由(you)于軸向波(bo)紋(wen)(wen)(wen)的存在使其具(ju)有優良(liang)的受力(li)特征,軸向和(he)徑向同時分布因荷載引起的應力(li)應變,可(ke)以(yi)更(geng)(geng)大程度上(shang)分散荷載的效(xiao)應,更(geng)(geng)好地發(fa)揮鋼(gang)結(jie)構(gou)的優勢(shi)。通過前期的不(bu)(bu)懈努力(li),中(zhong)交(jiao)一公院道(dao)路(lu)波(bo)紋(wen)(wen)(wen)鋼(gang)結(jie)構(gou)研發(fa)中(zhong)心在馬龍連接(jie)線上(shang)已完成多道(dao)波(bo)紋(wen)(wen)(wen)鋼(gang)管涵洞(dong)(dong)的安裝(zhuang)及回填(tian)工作,為全線的路(lu)基(ji)整體提前貫通提供寶貴(gui)時間。
鋼波紋管是由(you)碳鋼板經冷成型加(jia)工(gong)而成的管(guan)壁帶有波(bo)形截面的并(bing)且管(guan)體表面經耐腐蝕處(chu)理的金(jin)屬管(guan)道狀結(jie)構(gou)物,用來代替公路(lu)、鐵路(lu)工(gong)程(cheng)中(zhong)的砼涵洞及小橋等。具有一定柔性的高(gao)強度鋼波(bo)紋管(guan),不(bu)僅提高(gao)了適(shi)應(ying)(ying)(ying)地基(ji)與基(ji)礎變形的能力,有效(xiao)解決因(yin)地基(ji)基(ji)礎不(bu)均勻沉降(jiang)導(dao)致涵洞破壞的問題,而且波(bo)紋涵管(guan)涵洞由(you)于(yu)軸向(xiang)波(bo)紋的存(cun)在使其具有優良的受力特(te)性,軸向(xiang)和徑向(xiang)同時承擔因(yin)載(zai)荷引(yin)起的應(ying)(ying)(ying)力應(ying)(ying)(ying)變,可以(yi)更大(da)程(cheng)度上(shang)分(fen)散(san)載(zai)荷的效(xiao)應(ying)(ying)(ying),更好地發揮鋼結(jie)構(gou)的優勢。
采用鋼波紋管涵洞可有效地縮短工期
鋼波紋(wen)管涵(han)應用工程實例
廣東(dong)省某山區高(gao)(gao)速公路有(you)2個(ge) U 形(xing)溝谷路段,原施工(gong)圖設(she)計(ji)采用高(gao)(gao)架橋(qiao)(qiao)跨越,但在實施階段由于征(zheng)地(di)拆遷等原因(yin),導致施工(gong)進度滯(zhi)后許(xu)多。為(wei)加快施工(gong)進度,將兩處(chu)(chu)高(gao)(gao)架橋(qiao)(qiao)改(gai)為(wei)填(tian)方路基,同(tong)時設(she)置涵(han)洞(dong)滿足過人及過水的(de)需求。由于涵(han)頂填(tian)土(tu)較高(gao)(gao),備選涵(han)洞(dong)方案(an)有(you)拱涵(han)及鋼波(bo)紋(wen)管涵(han)2種,經過比較,采用在兩處(chu)(chu)填(tian)方路段均設(she)置鋼波(bo)紋(wen)管涵(han)的(de)方案(an)。
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