文章來源：中國(guo)冶(ye)金(jin)科工集團有限(xian)公司 發(fa)布時間：2016-05-08
5月(yue)5日，中國(guo)中冶所屬中冶沈勘工(gong)程技術有(you)限公司申(shen)請的(de)實用新型專利“長螺(luo)旋鉆孔壓灌樁嵌巖擴孔鉆頭”獲國(guo)家知識產權局授權。
該實用(yong)(yong)新(xin)型(xing)專利涉(she)及(ji)建筑地(di)基基礎施(shi)(shi)工(gong)的(de)(de)一種新(xin)鉆(zhan)(zhan)(zhan)頭，特別是(shi)涉(she)及(ji)用(yong)(yong)于長(chang)螺(luo)(luo)旋(xuan)鉆(zhan)(zhan)(zhan)壓(ya)灌(guan)樁擴(kuo)孔(kong)(kong)鉆(zhan)(zhan)(zhan)進及(ji)嵌(qian)(qian)巖(yan)擴(kuo)底(di)鉆(zhan)(zhan)(zhan)進鉆(zhan)(zhan)(zhan)頭。目前世(shi)界(jie)各國樁基礎、復合地(di)基施(shi)(shi)工(gong)中，長(chang)螺(luo)(luo)旋(xuan)鉆(zhan)(zhan)(zhan)孔(kong)(kong)壓(ya)灌(guan)樁以其施(shi)(shi)工(gong)速(su)度(du)快(kuai)、質量好、無污染等特點(dian)越來越多被(bei)工(gong)程(cheng)界(jie)采用(yong)(yong)。傳統的(de)(de)擴(kuo)孔(kong)(kong)、擴(kuo)底(di)鉆(zhan)(zhan)(zhan)進技術只適用(yong)(yong)于機械成(cheng)(cheng)(cheng)孔(kong)(kong)的(de)(de)水(shui)下灌(guan)注樁，并且(qie)成(cheng)(cheng)(cheng)孔(kong)(kong)、擴(kuo)底(di)需二次(ci)完成(cheng)(cheng)(cheng)，不僅施(shi)(shi)工(gong)速(su)度(du)慢，且(qie)容易產生縮徑、榻孔(kong)(kong)、水(shui)下灌(guan)注斷樁、孔(kong)(kong)底(di)沉渣超標等質量事(shi)故，同(tong)時泥漿(jiang)排放量大(da)，污染嚴重。而采用(yong)(yong)長(chang)螺(luo)(luo)旋(xuan)鉆(zhan)(zhan)(zhan)孔(kong)(kong)壓(ya)灌(guan)樁嵌(qian)(qian)巖(yan)擴(kuo)孔(kong)(kong)鉆(zhan)(zhan)(zhan)頭可一次(ci)完成(cheng)(cheng)(cheng)成(cheng)(cheng)(cheng)孔(kong)(kong)鉆(zhan)(zhan)(zhan)進、擴(kuo)孔(kong)(kong)、擴(kuo)底(di)、成(cheng)(cheng)(cheng)樁工(gong)作，不但(dan)成(cheng)(cheng)(cheng)樁質量好、效率高(gao)，同(tong)時可降低直接成(cheng)(cheng)(cheng)本(ben)30%。
該專利技術處于全(quan)國(guo)先進水平，將于近期投入使(shi)用，預計將首先面(mian)向遼寧省內(nei)的工程，待(dai)條(tiao)件(jian)成熟將向東北(bei)地區乃至(zhi)全(quan)國(guo)進行推廣。