鋼波紋涵管是(shi)一種柔性結構,鋼波(bo)紋(wen)涵管在結構上具有橫(heng)向補償位移的特(te)(te)性,能夠充分發(fa)揮鋼材抗(kang)(kang)拉功能強、抗(kang)(kang)變(bian)形才干(gan)的特(te)(te)色,具有較(jiao)大的抗(kang)(kang)變(bian)形才干(gan)和抗(kang)(kang)沉降才干(gan),特(te)(te)別適合于軟土(tu)、膨(peng)脹(zhang)土(tu)、濕(shi)陷性黃(huang)土(tu)等地基承載力較(jiao)低的區(qu)域和地震多(duo)發(fa)區(qu)域。
因(yin)為鋼波紋涵(han)管施(shi)工(gong)(gong)(gong)簡略(lve)且施(shi)工(gong)(gong)(gong)工(gong)(gong)(gong)期短(一般一道(dao)涵(han)洞的施(shi)工(gong)(gong)(gong)時刻(ke)大約(yue)在10天-15天左右)縮短了多年凍(dong)土的裸(luo)露時刻(ke),凍(dong)融量(liang)小(xiao)(xiao),故特別適(shi)用于(yu)多年凍(dong)土區(qu)域(yu)(yu)。鋼波紋涵(han)管施(shi)工(gong)(gong)(gong)時對周圍環(huan)境的損壞(huai)小(xiao)(xiao),適(shi)用于(yu)生(sheng)態環(huan)境脆弱的區(qu)域(yu)(yu)鋼波紋涵(han)管施(shi)工(gong)(gong)(gong)中(zhong)只需要對基礎進(jin)(jin)行砂礫回填處理,對進(jin)(jin)出(chu)口進(jin)(jin)行混凝土或砌(qi)石施(shi)工(gong)(gong)(gong)處理,對砂、石材、鋼筋等用量(liang)小(xiao)(xiao),十分(fen)實(shi)用于(yu)砂石缺少的區(qu)域(yu)(yu)。
鋼波紋涵管選用(yong)標準化規劃、工(gong)廠(chang)加工(gong)出(chu)產(chan)(chan)(chan),出(chu)產(chan)(chan)(chan)不(bu)受(shou)環境影響,進行會合工(gong)廠(chang)化出(chu)產(chan)(chan)(chan),出(chu)產(chan)(chan)(chan)周期短,實(shi)用(yong)于質量(liang)要求(qiu)高,工(gong)期緊,基礎差的工(gong)程(cheng)項目(mu)。鋼波紋涵管結構受(shou)力(li)狀況(kuang)合理(li),荷(he)載散布(bu)均勻,并有一定(ding)的抗變形才干。
削減或底子拋棄了慣例(li)建材,如(ru)水泥、黃砂、石子、木材的運用(yong),環保意義深遠(yuan)。處理北方(fang)冰(bing)冷區(qu)域(霜凍)對橋梁和管砼結(jie)構的損(sun)壞問題。現(xian)場裝置(zhi)便利,不需運用(yong)大型(xing)設(she)備。雨(yu)期(qi)施工應(ying)提早安(an)(an)排,盡量安(an)(an)排在降(jiang)(jiang)雨(yu)降(jiang)(jiang)臨前完結(jie),基坑周(zhou)邊(bian)有(you)防水設(she)施,避免邊(bian)水流入(ru)基坑內。
增(zeng)加砂、石料含水量檢測(ce)頻率(lv),及時調整混凝(ning)(ning)土合作比,確(que)保混凝(ning)(ning)土拌和質量。應特別(bie)注意做(zuo)(zuo)好(hao)供(gong)電(dian)(dian)線(xian)(xian)路保護,現場(chang)機電(dian)(dian)設備的電(dian)(dian)閘箱應采(cai)取隱瞞、防潮措施,電(dian)(dian)線(xian)(xian)做(zuo)(zuo)到絕(jue)緣良好(hao),避免漏觸電(dian)(dian)事端發生。
從資(zi)料與構(gou)造(zao)(zao)和功用的實(shi)質(zhi)關系(xi)上分析,選用柔性(xing)高,強度的鋼波紋(wen)涵管洞,不只(zhi)具(ju)有習氣地基(ji)與基(ji)礎變(bian)形的才干(gan),能夠(gou)處理因(yin)地基(ji)基(ji)礎不均勻沉(chen)降導致的涵洞損壞(huai)疑問,而且(qie)鋼波紋(wen)涵管洞因(yin)為(wei)軸向波紋(wen)的存在使其具(ju)有的受力特征,軸向和徑向一同散(san)(san)布(bu)因(yin)荷載(zai)引起的應力應變(bian),能夠(gou)更(geng)大(da)程度上松散(san)(san)荷載(zai)的應力會(hui)合,更(geng)好地發揮鋼構(gou)造(zao)(zao)的優勢。
焊接時環境溫度應不低于-20℃,且應采取防雪、擋風等措施,削減焊件的溫度差。焊接后的接頭嚴禁當即接觸冰雪。冬期拌和混凝土時應嚴格操控混凝土的合作比和坍落度,集料不得帶有冰雪和凍結團塊。鋼波紋涵管投料前,應先選用熱水或蒸汽沖洗拌和機拌盤或鼓筒。//hanihanbj.com
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