芒果视频

基本介紹

金(jin)匱(kui)(kui)大(da)(da)橋(qiao)(qiao)(qiao)，簡稱金(jin)匱(kui)(kui)橋(qiao)(qiao)(qiao)。現有(you)金(jin)匱(kui)(kui)橋(qiao)(qiao)(qiao)位(wei)于(yu)無錫市中心城區南長區，為城市主(zhu)干道太湖大(da)(da)道跨越(yue)京杭(hang)運(yun)河(he)的一座橋(qiao)(qiao)(qiao)梁。原(yuan)金(jin)匱(kui)(kui)橋(qiao)(qiao)(qiao)為鋼筋(jin)混凝(ning)土(tu)剛架(jia)拱(gong)(gong)橋(qiao)(qiao)(qiao)，由于(yu)拱(gong)(gong)趾沉(chen)降不(bu)均勻，現已限(xian)載通(tong)行(xing)。根據城市規劃，擬在舊橋(qiao)(qiao)(qiao)原(yuan)址(zhi)上重(zhong)建本項目。改(gai)建后金(jin)匱(kui)(kui)橋(qiao)(qiao)(qiao)采用55m+105m+55m鋼桁架(jia)鋼箱梁橋(qiao)(qiao)(qiao)，橋(qiao)(qiao)(qiao)寬46m，主(zhu)跨跨越(yue)京杭(hang)大(da)(da)運(yun)河(he)，邊(bian)跨跨越(yue)運(yun)河(he)東路和(he)運(yun)河(he)西路。

建筑設計

金(jin)匱橋(qiao)地處太湖(hu)廣場，景(jing)觀(guan)要(yao)求(qiu)高(gao)，因此需要(yao)大橋(qiao)具有(you)較強的(de)標(biao)志性。大橋(qiao)橋(qiao)面較寬，既要(yao)滿(man)足(zu)通航及運河東路凈(jing)空要(yao)求(qiu)，又需盡早(zao)落地進入兩端連接的(de)隧(sui)道，故梁體高(gao)度應盡可能小。

在比(bi)選了各(ge)種橋(qiao)型方案后，對(dui)于(yu)主跨為100m左右(you)，橋(qiao)寬46m的橋(qiao)梁(liang)，采用下承式鋼桁(heng)(heng)梁(liang)可謂最佳選擇(ze)。設計中創新地將懸索橋(qiao)造(zao)型與傳統鋼桁(heng)(heng)梁(liang)有機地結(jie)合(he)，利用主桁(heng)(heng)富于(yu)變化的曲(qu)線(xian)，塑造(zao)出風格獨(du)特的鋼桁(heng)(heng)梁(liang)橋(qiao)。

主(zhu)(zhu)(zhu)梁(liang)(liang)(liang)(liang)采(cai)(cai)用(yong)(yong)(yong)開口(kou)(kou)式主(zhu)(zhu)(zhu)桁(heng)(heng)(heng)(heng)與鋼(gang)箱(xiang)(xiang)梁(liang)(liang)(liang)(liang)相結(jie)合，此類結(jie)構在國(guo)內應用(yong)(yong)(yong)較少。開口(kou)(kou)式主(zhu)(zhu)(zhu)桁(heng)(heng)(heng)(heng)由于沒有橫聯(lian)與平聯(lian)，橋(qiao)面(mian)視線更(geng)開闊，景觀效(xiao)(xiao)果(guo)更(geng)好。但在汽車活載(zai)作用(yong)(yong)(yong)下，主(zhu)(zhu)(zhu)桁(heng)(heng)(heng)(heng)上(shang)弦跨(kua)中(zhong)桿件(jian)受壓，容易發生整體(ti)失穩，對于跨(kua)度不大、桁(heng)(heng)(heng)(heng)高不高的(de)鋼(gang)桁(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)，通(tong)過(guo)控制主(zhu)(zhu)(zhu)桁(heng)(heng)(heng)(heng)上(shang)弦跨(kua)中(zhong)桿件(jian)應力水平，能有效(xiao)(xiao)地解(jie)決主(zhu)(zhu)(zhu)桁(heng)(heng)(heng)(heng)的(de)整體(ti)失穩問(wen)題。對主(zhu)(zhu)(zhu)桁(heng)(heng)(heng)(heng)桁(heng)(heng)(heng)(heng)數(shu)的(de)選(xuan)擇，可采(cai)(cai)用(yong)(yong)(yong)3片主(zhu)(zhu)(zhu)桁(heng)(heng)(heng)(heng)，橋(qiao)面(mian)系采(cai)(cai)用(yong)(yong)(yong)縱(zong)、橫肋(lei)加固的(de)正(zheng)(zheng)交(jiao)異(yi)性(xing)鋼(gang)橋(qiao)板(ban)面(mian)體(ti)系；也可采(cai)(cai)用(yong)(yong)(yong)2片主(zhu)(zhu)(zhu)桁(heng)(heng)(heng)(heng)，橋(qiao)面(mian)系采(cai)(cai)用(yong)(yong)(yong)正(zheng)(zheng)交(jiao)異(yi)性(xing)板(ban)鋼(gang)箱(xiang)(xiang)梁(liang)(liang)(liang)(liang)體(ti)系，這兩種均能滿足(zu)通(tong)航(hang)凈空要(yao)求。經(jing)多方面(mian)比較，采(cai)(cai)用(yong)(yong)(yong)2片主(zhu)(zhu)(zhu)桁(heng)(heng)(heng)(heng)、橋(qiao)面(mian)系為正(zheng)(zheng)交(jiao)異(yi)性(xing)板(ban)鋼(gang)箱(xiang)(xiang)梁(liang)(liang)(liang)(liang)體(ti)系。