本工(gong)(gong)程为黄陵至延(yan)安高(gao)速公(?gong)路(lu)扩(kuo)能工(gong)(gong)程一局部，具(ju)备实验性子，其特色(se)为布局新奇多样、建(jian)造(zao)?工(gong)(gong)艺庞杂。该工(gong)(gong)程分K15、K16、K18三个分项工(gong)(gong)程。

K15工程全(quan)长96.96米(mi)(mi)(mi)(mi)。主(zhu)体布局为(wei)矩形(xing)钢(gang)管混(hun)凝(ning)土(tu)组(zu)合(he)桁架持续(xu)刚构桥，跨径安(an)排为(wei)24+40+24米(mi)(mi)(mi)(mi)，主(zhu)墩(dun)(dun)接纳PBL加劲(jing)型(xing)(xing)钢(gang)管混(hun)凝(ning)土(tu)桥墩(dun)(dun)，墩(dun)(dun)梁刚接。桥台接纳桩借盖梁轻型(xing)(xing)桥台。根(gen)?本情势均为(wei)穿孔贯(guan)注桩基根(gen)本。桥面(mian)高宽比0.5（护栏）+4.5（桥面(mian)）+0.5（护栏）=5.5米(mi)(mi)(mi)(mi)，双向(xiang)2%的横(heng)坡(po)。汽车承载(zai)品质达公(gong)路网(wang)-II级。上部布局外面(mian)安(an)排为(wei)三角(jiao)形(xing)腹杆桁架体系，桁高2.5米(mi)(mi)(mi)(mi)，桁高与跨径之比为(wei)1/16。共22个(ge)节间(jian)，每节间(jian)长4m。截面(mian)情势为(wei)空间(jian)矩形(xing)。下部布局主(zhu)墩(dun)(dun)首(shou)要接纳双肢“Y”形(xing)PBL加劲(jing)型(xing)(xing)钢(gang)管混(hun)凝(ning)土(tu)桥墩(dun)(dun)，墩(dun)(dun)梁刚接，钢(gang)管内贯(guan)注混(hun)凝(ning)土(tu)。

黄延工程施工厂内修建

黄延工程现场装置