鋼波紋涵管是一種(zhong)柔性結構(gou),鋼(gang)波紋涵(han)管在結構(gou)上具有(you)(you)橫向補(bu)償位(wei)移(yi)的特(te)性,能(neng)夠充分發揮(hui)鋼(gang)材(cai)抗(kang)(kang)拉功(gong)能(neng)強(qiang)、抗(kang)(kang)變(bian)形才干的特(te)色,具有(you)(you)較大的抗(kang)(kang)變(bian)形才干和(he)抗(kang)(kang)沉降(jiang)才干,特(te)別適合于軟土(tu)、膨(peng)脹土(tu)、濕陷性黃土(tu)等(deng)地(di)(di)基(ji)承載(zai)力較低的區域和(he)地(di)(di)震多發區域。
因為(wei)鋼波紋涵(han)管(guan)施工(gong)(gong)(gong)(gong)簡(jian)略且施工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)期短(一(yi)般一(yi)道涵(han)洞的施工(gong)(gong)(gong)(gong)時(shi)刻(ke)大約在(zai)10天-15天左右)縮短了多年凍土的裸露時(shi)刻(ke),凍融量(liang)小(xiao)(xiao),故特(te)別(bie)適用(yong)(yong)于(yu)多年凍土區(qu)域。鋼波紋涵(han)管(guan)施工(gong)(gong)(gong)(gong)時(shi)對(dui)周圍環(huan)境的損(sun)壞小(xiao)(xiao),適用(yong)(yong)于(yu)生態環(huan)境脆弱的區(qu)域鋼波紋涵(han)管(guan)施工(gong)(gong)(gong)(gong)中(zhong)只需要對(dui)基礎進行砂礫回填處(chu)理,對(dui)進出口(kou)進行混(hun)凝土或砌石(shi)施工(gong)(gong)(gong)(gong)處(chu)理,對(dui)砂、石(shi)材、鋼筋等用(yong)(yong)量(liang)小(xiao)(xiao),十(shi)分實用(yong)(yong)于(yu)砂石(shi)缺少的區(qu)域。
鋼(gang)波紋(wen)涵管(guan)選用(yong)(yong)標準化規劃、工(gong)廠(chang)加工(gong)出(chu)(chu)產,出(chu)(chu)產不受環境影(ying)響(xiang),進行會(hui)合(he)(he)工(gong)廠(chang)化出(chu)(chu)產,出(chu)(chu)產周(zhou)期短,實用(yong)(yong)于質量(liang)要求高,工(gong)期緊,基(ji)礎差(cha)的工(gong)程項目。鋼(gang)波紋(wen)涵管(guan)結構受力(li)狀況合(he)(he)理,荷載(zai)散(san)布均勻,并有一(yi)定的抗變形(xing)才干(gan)。
削減或(huo)底子拋棄了慣例建(jian)材,如(ru)水泥、黃砂、石子、木材的運用(yong),環保意義深遠。處(chu)理北方(fang)冰冷區域(霜凍)對橋梁和管砼結構的損壞問題。現場裝置(zhi)便利(li),不需運用(yong)大型設備(bei)。雨期施工(gong)應(ying)提早(zao)安(an)排,盡量安(an)排在降(jiang)雨降(jiang)臨(lin)前完結,基坑周邊有防水設施,避免邊水流入基坑內。
增加砂、石(shi)料含水量檢測頻率(lv),及時調整混(hun)凝土(tu)合(he)作(zuo)比,確保(bao)混(hun)凝土(tu)拌和質量。應特(te)別注意做好(hao)供電線(xian)路保(bao)護,現場(chang)機(ji)電設(she)備的電閘箱(xiang)應采取隱(yin)瞞、防潮措施,電線(xian)做到(dao)絕緣良好(hao),避免漏觸(chu)電事端發生。
從資料(liao)與(yu)構造(zao)和(he)功用的(de)實(shi)質關系上分析(xi),選用柔(rou)性(xing)高,強度(du)的(de)鋼波紋涵管(guan)(guan)洞(dong),不只具(ju)有習氣地(di)(di)基與(yu)基礎變形的(de)才干,能(neng)夠處理因地(di)(di)基基礎不均勻沉降導(dao)致的(de)涵洞(dong)損(sun)壞疑問,而且鋼波紋涵管(guan)(guan)洞(dong)因為軸向波紋的(de)存在使其具(ju)有的(de)受力特征,軸向和(he)徑向一(yi)同散布因荷載(zai)引起的(de)應(ying)(ying)力應(ying)(ying)變,能(neng)夠更大程度(du)上松散荷載(zai)的(de)應(ying)(ying)力會(hui)合,更好地(di)(di)發揮(hui)鋼構造(zao)的(de)優勢(shi)。
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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