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12月15日，由云南交(jiao)投集團承(cheng)建主跨為300米的(de)景海(hai)高速瀾(lan)滄江(jiang)特大(da)橋(qiao)——中國第一大(da)跨徑的(de)上承(cheng)式鋼箱(xiang)拱橋(qiao)順利(li)合龍，大(da)橋(qiao)的(de)合龍為景海(hai)高速按期建成通車(che)奠定了堅實的(de)基(ji)礎(chu)。

景(jing)洪(hong)至勐海(hai)高速公(gong)路主線起自景(jing)洪(hong)市東，接(jie)小勐養至景(jing)洪(hong)高速公(gong)路K10+127處，止于勐海(hai)縣(xian)城南，主線全(quan)長(chang)54.229公(gong)里，瀾滄(cang)江特大橋(qiao)位于K7+795處，為橫跨(kua)瀾滄(cang)江所設(she)，北岸接(jie)路基，南岸接(jie)曼回1號(hao)連拱(gong)小凈距隧道。全(quan)橋(qiao)跨(kua)徑(jing)布(bu)置(zhi)為3×40米組(zu)合梁(liang)+300米上承(cheng)式鋼(gang)箱(xiang)拱(gong)橋(qiao)+2×40米組(zu)合梁(liang)，主墩鉆孔樁(zhuang)(zhuang)基礎直徑(jing)為3.5m，樁(zhuang)(zhuang)長(chang)55m，橋(qiao)面為雙向(xiang)四車道，是景(jing)海(hai)高速公(gong)路重點(dian)控(kong)制(zhi)性工程。

自2018年8月進場施(shi)(shi)工(gong)(gong)(gong)(gong)以來，景海公司及全體參建(jian)(jian)(jian)者(zhe)積(ji)極(ji)克服重重困難(nan)(nan)，穩步推(tui)進了項目建(jian)(jian)(jian)設(she)。一是總結提煉出了一套山區拱橋(qiao)的施(shi)(shi)工(gong)(gong)(gong)(gong)方法，有效克服巖(yan)層構造復雜(za)、降(jiang)水(shui)量(liang)大(da)、施(shi)(shi)工(gong)(gong)(gong)(gong)難(nan)(nan)度大(da)、環保要求(qiu)高(gao)等困難(nan)(nan)，并獲(huo)得多項技術創新成果。二是采(cai)(cai)用膨潤土造漿(jiang)、投放水(shui)泥、回填塊石及高(gao)標(biao)號混凝土、沖鉆(zhan)結合的方法，解決了大(da)直(zhi)徑鉆(zhan)孔樁在基巖(yan)強度高(gao)、裂(lie)隙發達的情(qing)況下(xia)鉆(zhan)孔困難(nan)(nan)大(da)、進度慢、泥漿(jiang)漏失嚴重的難(nan)(nan)題。三是采(cai)(cai)用小(xiao)角(jiao)度大(da)截面門洞式斜(xie)撐樁施(shi)(shi)工(gong)(gong)(gong)(gong)工(gong)(gong)(gong)(gong)法，解決了大(da)橋(qiao)小(xiao)角(jiao)度（俯角(jiao)14度)斜(xie)撐樁施(shi)(shi)工(gong)(gong)(gong)(gong)難(nan)(nan)題。四(si)是及時制定“疫(yi)情(qing)防控”方案，采(cai)(cai)用專車將湖南湖北等外來務工(gong)(gong)(gong)(gong)人(ren)員接回，實(shi)現大(da)橋(qiao)施(shi)(shi)工(gong)(gong)(gong)(gong)快速復工(gong)(gong)(gong)(gong)復產。五是建(jian)(jian)(jian)設(she)了符合標(biao)準化(hua)場站建(jian)(jian)(jian)設(she)的鋼(gang)結構加工(gong)(gong)(gong)(gong)場，全面推(tui)行現代工(gong)(gong)(gong)(gong)程“五化(hua)標(biao)準建(jian)(jian)(jian)設(she)”，實(shi)行集中生產、集中加工(gong)(gong)(gong)(gong)，精細(xi)管(guan)理(li)(li)(li)，切實(shi)發揮(hui)好(hao)標(biao)準化(hua)管(guan)理(li)(li)(li)，控制好(hao)質量(liang)安全管(guan)理(li)(li)(li)的源頭，為特大(da)橋(qiao)的建(jian)(jian)(jian)設(she)保駕護(hu)航(hang)。

景(jing)海高速(su)建(jian)成通(tong)(tong)車(che)后，西雙版(ban)納傣(dai)族自(zi)治州(zhou)將實(shi)現縣縣通(tong)(tong)高速(su)公路，從(cong)景(jing)洪到(dao)勐海的行車(che)時間從(cong)約(yue)60分鐘(zhong)縮短到(dao)約(yue)30分鐘(zhong)，對完善高速(su)公路網、促進區域發展、加(jia)強(qiang)我國與(yu)周邊(bian)國家互聯互通(tong)(tong)具有重要意義。

【責任編輯：語謙】