免费菠萝视频app下载

12月15日，由云(yun)南交投集團(tuan)承建(jian)(jian)主跨為300米的(de)景海(hai)高速瀾(lan)滄江特大(da)橋(qiao)——中國第一(yi)大(da)跨徑(jing)的(de)上承式鋼箱(xiang)拱橋(qiao)順利合龍(long)(long)，大(da)橋(qiao)的(de)合龍(long)(long)為景海(hai)高速按期(qi)建(jian)(jian)成通車奠(dian)定了(le)堅(jian)實的(de)基礎。

景洪至(zhi)勐海高速(su)公路主線起自景洪市東，接小勐養至(zhi)景洪高速(su)公路K10+127處，止于勐海縣城南(nan)，主線全長54.229公里，瀾(lan)滄江特(te)大(da)橋(qiao)位(wei)于K7+795處，為(wei)(wei)(wei)橫跨(kua)瀾(lan)滄江所設，北(bei)岸接路基，南(nan)岸接曼回1號連拱小凈(jing)距(ju)隧道。全橋(qiao)跨(kua)徑(jing)布(bu)置為(wei)(wei)(wei)3×40米組合(he)梁+300米上承式鋼箱拱橋(qiao)+2×40米組合(he)梁，主墩鉆孔樁(zhuang)(zhuang)基礎直徑(jing)為(wei)(wei)(wei)3.5m，樁(zhuang)(zhuang)長55m，橋(qiao)面為(wei)(wei)(wei)雙向四車道，是景海高速(su)公路重點(dian)控制性工程。

自2018年8月進場(chang)施(shi)(shi)工(gong)(gong)(gong)以來，景海公司及全體參建(jian)(jian)者積極(ji)克(ke)服重重困難(nan)，穩步(bu)推進了項目建(jian)(jian)設。一是(shi)(shi)總結(jie)提煉出了一套山區拱橋的(de)(de)(de)施(shi)(shi)工(gong)(gong)(gong)方(fang)(fang)法(fa)，有效克(ke)服巖層構(gou)造復(fu)雜(za)、降水量大(da)(da)(da)、施(shi)(shi)工(gong)(gong)(gong)難(nan)度(du)(du)大(da)(da)(da)、環保要(yao)求(qiu)高等困難(nan)，并獲(huo)得多項技(ji)術創新(xin)成果(guo)。二(er)是(shi)(shi)采用(yong)膨潤土造漿、投(tou)放水泥、回(hui)填塊石及高標(biao)號混凝土、沖(chong)鉆結(jie)合(he)的(de)(de)(de)方(fang)(fang)法(fa)，解(jie)決(jue)了大(da)(da)(da)直徑鉆孔(kong)樁在基(ji)巖強度(du)(du)高、裂(lie)隙發(fa)達的(de)(de)(de)情(qing)況下鉆孔(kong)困難(nan)大(da)(da)(da)、進度(du)(du)慢、泥漿漏失(shi)嚴重的(de)(de)(de)難(nan)題(ti)。三是(shi)(shi)采用(yong)小角(jiao)度(du)(du)大(da)(da)(da)截(jie)面門(men)洞式斜(xie)(xie)撐樁施(shi)(shi)工(gong)(gong)(gong)工(gong)(gong)(gong)法(fa)，解(jie)決(jue)了大(da)(da)(da)橋小角(jiao)度(du)(du)（俯(fu)角(jiao)14度(du)(du))斜(xie)(xie)撐樁施(shi)(shi)工(gong)(gong)(gong)難(nan)題(ti)。四是(shi)(shi)及時制(zhi)(zhi)定“疫情(qing)防控”方(fang)(fang)案，采用(yong)專車將(jiang)湖(hu)(hu)南湖(hu)(hu)北等外(wai)來務工(gong)(gong)(gong)人(ren)員(yuan)接回(hui)，實現(xian)大(da)(da)(da)橋施(shi)(shi)工(gong)(gong)(gong)快速復(fu)工(gong)(gong)(gong)復(fu)產。五(wu)是(shi)(shi)建(jian)(jian)設了符合(he)標(biao)準化場(chang)站建(jian)(jian)設的(de)(de)(de)鋼結(jie)構(gou)加(jia)工(gong)(gong)(gong)場(chang)，全面推行現(xian)代工(gong)(gong)(gong)程“五(wu)化標(biao)準建(jian)(jian)設”，實行集中生產、集中加(jia)工(gong)(gong)(gong)，精細管(guan)理，切實發(fa)揮(hui)好(hao)標(biao)準化管(guan)理，控制(zhi)(zhi)好(hao)質(zhi)量安全管(guan)理的(de)(de)(de)源頭，為特大(da)(da)(da)橋的(de)(de)(de)建(jian)(jian)設保駕護(hu)航。

景(jing)海(hai)高速建成(cheng)通(tong)(tong)車(che)后，西雙版納傣族自(zi)治州將實現縣(xian)縣(xian)通(tong)(tong)高速公路，從景(jing)洪(hong)到勐海(hai)的(de)行車(che)時間從約60分鐘縮短(duan)到約30分鐘，對完善高速公路網(wang)、促(cu)進區域發展、加(jia)強我國(guo)與周邊(bian)國(guo)家互聯互通(tong)(tong)具有重(zhong)要意義(yi)。

【責任編輯：語謙】