纳界河(he)(he)超大(da)(da)??桥(qiao)(qiao)在林织(zhi)（新）线(xian)林歹南至织(zhi)金段坪子上至大(da)(da)冲范围(wei)，清镇市与织(zhi)金县交(jiao)壤处(chu)的大(da)(da)寨村(cun)的纳界河(he)(he)上，该桥(qiao)(qiao)中央(yang)航空里程为(wei)ZDK24+008.00。主桁为(wei)352m上承式(shi)钢桁拱(gong)，引桥(qiao)(qiao)及拱(gong)上梁(lia??ng)跨科学安排为(wei)3×24简支(zhi)梁(liang)+1×32简支(zhi)梁(liang)+2×48T构+11×24.7钢混聯系梁(liang)+2×48T构+7×32简支(zhi)梁(liang)，起点终点810.10m，。全桥(qiao)(qiao)重(zhong)中之重(zhong)姿料为(wei)Q370qE、Q345qE、Q345qD，全桥(qiao)(qiao)总重(zhong)约(yue)9000吨。

我工(gong)厂被任命为(wei)(wei)(wei)(wei)该(gai)桥(qiao)配置土建工(gong)程，该(gai)桥(qiao)应具(ju)总柱距长(zhang)、规划(hua)冗杂、土建工(gong)程一(yi)定难(nan)度大等优(you)势。跨(kua)(kua)径拟(ni)定：主桥(qiao)真实(shi)跨(kua)(kua)径为(wei)(wei)(wei)(wei)L=352m，拱(gong)(gong)(gong)座本(ben)质上(shang)完整性(xing)处于岸坡(po)不(bu)减线内(nei)；矢跨(kua)(kua)比(bi)求矢高：主桥(qiao)为(wei)(wei)(wei)(wei)?上(shang)承(cheng)式提(ti)篮(lan)钢桁(heng)(heng)拱(gong)(gong)(gong)规划(hua)，矢高64.5m，矢跨(kua)(kua)比(bi)1/5.46；拱(gong)(gong)(gong)轴(zhou)中线在XOZ制做(zuo)空间及竖向(xiang)(xiang)制做(zuo)空间内(nei)为(wei)(wei)(wei)(wei)悬(xuan)链线，拱(gong)(gong)(gong)轴(zhou)弹性(xing)系数m=1.5。主桥(qiao)为(wei)(wei)(wei)(wei)上(shang)承(cheng)式提(ti)篮(lan)钢桁(heng)(heng)拱(gong)(gong)(gong)规划(hua)，主桁(heng)(heng)为(wei)(wei)(wei)(wei)N型架，拱(gong)(gong)(gong)顶处弦(xian)杆平面投(tou)屏(ping)机(ji)桁(heng)(heng)高8.0m，拱(gong)(gong)(gong)脚(jiao)处弦(xian)杆平面投(tou)屏(ping)机(ji)桁(heng)(heng)高13.0m，节间度投(tou)屏(ping)机(ji)长(zhang)宽8.2333m。拱(gong)(gong)(gong)顶处主桁(heng)(heng)中距8.0m，拱(gong)(gong)(gong)角(jiao)处主桁(heng)(heng)中距27.0m，弦(xian)杆内(nei)坡(po)度8.37867°。弦(xian)杆断面中至拱(gong)(gong)(gong)角(jiao)真实(shi)中的竖向(xiang)(xiang)间格(ge)64.5m。

图1：纳界河江大桥土建工程场地

图2：纳界河江大桥室内地坪功夫

图3：纳界河大桥全貌