文章(zhang)來源：中國電力建設集(ji)團有限公司 發(fa)布時間(jian)：2016-12-30
12月26日，由(you)中國電建集團所屬(shu)水電九局(ju)承建的(de)世界第一大跨混凝土(tu)拱式渡槽——黔中水利樞紐(niu)總干渠龍場渡槽主(zhu)體工(gong)程圓滿(man)完工(gong)。
黔(qian)中(zhong)水(shui)(shui)(shui)利(li)(li)樞(shu)紐(niu)(niu)工(gong)(gong)(gong)(gong)程(cheng)(cheng)是貴州省首個(ge)大型跨(kua)(kua)地(di)(di)區、跨(kua)(kua)流域(yu)(yu)、長距離水(shui)(shui)(shui)利(li)(li)調(diao)水(shui)(shui)(shui)重點民生工(gong)(gong)(gong)(gong)程(cheng)(cheng)，也(ye)是貴州省水(shui)(shui)(shui)利(li)(li)工(gong)(gong)(gong)(gong)程(cheng)(cheng)“三年會(hui)戰”的(de)(de)標(biao)志性(xing)工(gong)(gong)(gong)(gong)程(cheng)(cheng)。工(gong)(gong)(gong)(gong)程(cheng)(cheng)在位于(yu)長江流域(yu)(yu)烏(wu)江干(gan)流三岔河修建總庫容10.8億(yi)立方米(mi)的(de)(de)平(ping)(ping)寨水(shui)(shui)(shui)庫，將水(shui)(shui)(shui)引(yin)入黔(qian)中(zhong)地(di)(di)區十多個(ge)縣(xian)(市)的(de)(de)49個(ge)鄉(xiang)鎮，覆蓋面積(ji)達4711平(ping)(ping)方公里。干(gan)渠總長為156.5公里，總灌溉(gai)面積(ji)65.23萬畝，可以(yi)解決39.5萬人畜飲水(shui)(shui)(shui)困難(nan)。樞(shu)紐(niu)(niu)工(gong)(gong)(gong)(gong)程(cheng)(cheng)分為水(shui)(shui)(shui)源工(gong)(gong)(gong)(gong)程(cheng)(cheng)、灌區工(gong)(gong)(gong)(gong)程(cheng)(cheng)和(he)供水(shui)(shui)(shui)工(gong)(gong)(gong)(gong)程(cheng)(cheng)，工(gong)(gong)(gong)(gong)程(cheng)(cheng)分兩期建設(she)，一期工(gong)(gong)(gong)(gong)程(cheng)(cheng)總投資約73億(yi)元。龍場渡槽位于(yu)水(shui)(shui)(shui)利(li)(li)輸水(shui)(shui)(shui)配送工(gong)(gong)(gong)(gong)程(cheng)(cheng)總干(gan)渠上，單跨(kua)(kua)200米(mi)，是目前世(shi)界(jie)上同類渡槽中(zhong)跨(kua)(kua)度最大的(de)(de)渡槽，被稱為“世(shi)界(jie)第一跨(kua)(kua)”，其科技和(he)工(gong)(gong)(gong)(gong)藝難(nan)度堪稱中(zhong)國水(shui)(shui)(shui)利(li)(li)建設(she)的(de)(de)里程(cheng)(cheng)碑，是黔(qian)中(zhong)水(shui)(shui)(shui)利(li)(li)樞(shu)紐(niu)(niu)的(de)(de)控制性(xing)工(gong)(gong)(gong)(gong)程(cheng)(cheng)。
為攻克(ke)渡槽(cao)施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)中(zhong)的(de)各項技(ji)術(shu)難(nan)題，水電九局與(yu)國內(nei)知名橋梁專家密(mi)切(qie)合作(zuo)，組(zu)建現場專家工(gong)(gong)(gong)作(zuo)組(zu)攻堅克(ke)難(nan)。特(te)別(bie)是在拱圈(quan)吊裝過(guo)程中(zhong)，每一(yi)個(ge)環節施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)之前均作(zuo)了(le)(le)電腦仿(fang)真計算(suan)，每一(yi)階段(duan)的(de)實測數據隨時(shi)修正(zheng)理論模型參數。同時(shi)，施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)單位還大(da)膽改進了(le)(le)傳統的(de)工(gong)(gong)(gong)法，如對(dui)節段(duan)榫頭、索力張拉和標(biao)高(gao)(gao)調整等(deng)常規手段(duan)都作(zuo)了(le)(le)全面的(de)創新。這些創新措施(shi)(shi)(shi)(shi)提高(gao)(gao)了(le)(le)效(xiao)率，降(jiang)低了(le)(le)風(feng)險，改善(shan)了(le)(le)結構受(shou)力，也使(shi)得拱圈(quan)和槽(cao)殼吊裝精度控制誤差達(da)到了(le)(le)毫米級別(bie)，確保了(le)(le)渡槽(cao)施(shi)(shi)(shi)(shi)工(gong)(gong)(gong)的(de)順利完成。