本工(gong)(gong)程(cheng)(cheng)为黄陵至(zhi)延安高速公(gong)路(lu)扩能(neng)工(gong)(gong)程(cheng)(chen?g)一局部，具备(bei)实验(yan)性子，其特色为布局新奇多(duo)样、建造(zao)工(gong)(gong)艺(yi)庞杂。该工(gong)(gong)程(cheng)(cheng)分(fen)K15、K16、K18三(san)个(ge)分(fen??)项工(gong)(gong)程(cheng)(cheng)。

K15工程全(quan)长96.96米(mi)。主体(ti)(ti)布(bu)局为(wei)矩形(xing)钢管混(hun)凝(ning)(ning)土(tu)(tu)组合桁(heng)架(jia)持续刚构桥(qiao)，跨径安排为(wei)24+40+24米(mi)，主墩接(jie)(jie)(jie)纳(na)PBL加劲型钢管混(hun)凝(ning)(ning)土(tu)(tu)桥(qiao)墩，墩梁(liang)刚接(jie)(jie)(jie)。桥(qiao)台接(jie)(jie)(jie)纳(na)桩借盖梁(liang)轻型桥(qiao)台。根(gen)(gen)本情(qing)(qing)势(shi)(shi)均(jun)为(wei)穿(chuan)孔贯注桩基根(gen)(gen)本。桥(qiao)面(mian)厚度0.5（护栏）+4.5（桥(qiao)面(mian)）+0.5（护栏）=5.5米(mi)，双向(xiang)2%的横坡。汽车负荷(he)官阶达高(gao)速公(gong)路-II级。上部布(bu)局外面(mian)安排为(wei)三角形(xing)腹杆桁(heng)架(jia)体(ti)(ti)系(xi)，桁(heng)高(gao)2.5米(mi)，桁(heng)高(gao)与跨径之比为(wei)1/16。共22个节(jie)间(jian)，每(mei)节(jie)间?(jian)长4m。截面(mian)情(qing)(qing)势(shi)(shi)为(wei)空间(jian)矩形(xing)。下部布(bu)局主墩首要接(jie)(jie)(jie)纳(na)双肢“Y”形(xing)PBL加劲型钢管混(hun)凝(ning)(ning)土(tu)(tu)桥(qiao)墩，墩梁(liang)刚接(jie)(jie)(jie)，钢管内贯注混(hun)凝(ning)(ning)土(tu)(tu)。

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