管道穿越頂管施工是鼎順頂管施工的主要項目之一,在施工過程中鉆導向孔需要注意以下事項:
一:在(zai)風化花崗巖層(ceng)(ceng)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)進(jin)過(guo)程中若鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)頭(tou)(tou)遇到(dao)巖脈或在(zai)卵(luan)石層(ceng)(ceng)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)進(jin)過(guo)程中遇到(dao)較大(da)粒徑的(de)(de)(de)卵(luan)石時(shi),鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)孔軌跡都可(ke)能(neng)較明(ming)顯地(di)偏離設計軌跡,這時(shi)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)頭(tou)(tou)的(de)(de)(de)偏向很難(nan)預料。操(cao)作人員在(zai)意識到(dao)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)頭(tou)(tou)遇到(dao)硬物或較難(nan)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)進(jin)情況等微小變化時(shi),應(ying)馬上停鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan),檢驗鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)頭(tou)(tou)的(de)(de)(de)位(wei)置(zhi)。此(ci)時(shi),應(ying)降低鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)壓,緩慢給進(jin),讓鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)頭(tou)(tou)慢慢地(di)通過(guo)該區(qu)域。鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)進(jin)時(shi),應(ying)較頻(pin)繁地(di)檢測鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)頭(tou)(tou)的(de)(de)(de)位(wei)置(zhi)。
二:當鉆(zhan)(zhan)頭遇(yu)到較硬地層,通(tong)常需要加大鉆(zhan)(zhan)壓。但是,鉆(zhan)(zhan)壓加大后會(hui)引起孔(kong)內鉆(zhan)(zhan)桿彎曲。若鉆(zhan)(zhan)桿彎曲部位的地層較軟,彎曲的鉆(zhan)(zhan)桿會(hui)使鉆(zhan)(zhan)孔(kong)擴大。控向探頭只(zhi)能確定鉆(zhan)(zhan)頭的位置,很(hen)難(nan)確定這(zhe)種(zhong)由鉆(zhan)(zhan)桿彎曲而形成的鉆(zhan)(zhan)孔(kong)軌跡(ji)。在(zai)這(zhe)種(zhong)情況下,要適當降低鉆(zhan)(zhan)壓,嘗試(shi)采用沖(chong)擊鉆(zhan)(zhan)進的方法通(tong)過硬地層,同(tong)時,增加泵(beng)量(liang)或噴射作(zuo)用或許有助于軟化障礙物。
呼和浩特市鼎順機械化定向頂管有限公司作為一家現代化的民營企業,經過多年的努力我們也在同行業內獲得了一致的好評,先后同國內多家大型相關企業結成互惠合作關系,得到更多客戶的滿意也是我們所追求的目標,我公司全體員工也熱烈的歡迎各界朋友來我公司蒞臨指導,一起創造非開挖頂管工程美好明天。 主營項目是非開挖頂管拉管,期待您的來電!