纳界(jie)河特大(da)(da)型桥(qiao)(qiao)最靠近(jin)林织(zhi)(zhi??)（新）线(xian)林歹南至织(zhi)(zhi)金(jin)段坪子上(shang)至大(da)(da)冲(chong)范(fan)围(wei)内，清(qing)镇市与织(zhi)(zhi)金(jin)县交(jiao)壤处的(de)大(da)(da)寨村的(de)纳界(jie)河上(shang)，该(gai)桥(qiao)(qiao)中部里(li)程表为ZDK24+008.00。主桁为352m上(shang)承式钢桁拱，引桥(qiao)(qiao)及拱上(shang)梁(liang)跨安装为3×24简(jian)支(zhi)梁(liang)+1×32简(jian)支(zhi)梁(liang)+2×48T构+11×24.7钢混联系梁(liang)+2×48T构+7×32简(jian)支(zhi)梁(liang)，主跨810.10m，。全桥(qiao)(qiao)首选(xuan)资科为Q370qE、Q345qE、Q345qD，全桥(qiao)(qiao)总重约9000吨。

我子公司扮演该桥(qiao)安装作业(ye)，该桥(qiao)具备着总高跨(kua)度长、规(gui)划繁(fan)多、作业(ye)一(yi)定(ding)难度大(da)(da)等一(yi)大(da)(da)特(te)色。跨(kua)径制定(ding)：主桥(qiao)现(xian)实跨(kua)径为L=352m，拱(gong)(gong)(gong)(gong)座本(ben)质(zhi)完整的(de)(de)至(zhi)于岸(an)坡改变线内(nei)；矢跨(kua)还(hai)有(you)矢高：主桥(qiao)为上承式(shi)提篮(lan)钢(gang)桁(heng)拱(gong)(gong)(gong)(gong)规(gui)划，矢高64.5m，矢跨(kua)比1/5.46；拱(gong)(gong)(gong)(gong)轴(zhou)(zhou)中(zhong)(zhong)(zhong)的(de)(de)线在XOZ有(you)立(li)(li)(li)体式(shi)感(gan)及竖向有(you)立(li)(li)(li)体式(shi)感(gan)内(nei)为悬链(lian)线，拱??(gong)(gong)(gong)(gong)轴(zhou)(zhou)标准(zhun)值m=1.5。主桥(qiao)为上承式(shi)提篮(lan)钢(gang)桁(heng)拱(gong)(gong)(gong)(gong)规(gui)划，主桁(heng)为N型架，拱(gong)(gong)(gong)(gong)顶(ding)(ding)处(chu)弦(xian)(xian)杆(gan)(gan)(gan)建筑(zhu)(zhu)外立(li)(li)(li??)面投(tou)射(she)桁(heng)高8.0m，拱(gong)(gong)(gong)(gong)脚(jiao)处(chu)弦(xian)(xian)杆(gan)(gan)(gan)建筑(zhu)(zhu)外立(li)(li)(li)面投(tou)射(she)桁(heng)高13.0m，节间能力(li)投(tou)射(she)长宽(kuan)高8.2333m。拱(gong)(gong)(gong)(gong)顶(ding)(ding)处(chu)主桁(heng)中(zhong)(zhong)(zhong)的(de)(de)距8.0m，拱(gong)(gong)(gong)(gong)角处(chu)主桁(heng)中(zhong)(zhong)(zhong)的(de)(de)距27.0m，弦(xian)(xian)杆(gan)(gan)(gan)内(nei)斜度8.37867°。弦(xian)(xian)杆(gan)(gan)(gan)受力(li)中(zhong)(zhong)(zhong)的(de)(de)至(zhi)拱(gong)(gong)(gong)(gong)角现(xian)实中(zhong)(zhong)(zhong)的(de)(de)的(de)(de)竖向间断(duan)64.5m。

图1：纳界河跨河大桥建筑施工环境

图2：纳界河江大桥地坪学习方法

图3：纳界河大桥全貌