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(hua)花崗巖(yan)層鉆(zhan)(zhan)進(jin)過程中若鉆(zhan)(zhan)頭(tou)(tou)遇(yu)(yu)到(dao)巖(yan)脈或(huo)在(zai)卵石層鉆(zhan)(zhan)進(jin)過程中遇(yu)(yu)到(dao)較(jiao)(jiao)(jiao)大粒徑的卵石時,鉆(zhan)(zhan)孔軌跡(ji)(ji)都可能(neng)較(jiao)(jiao)(jiao)明顯地偏離設計軌跡(ji)(ji),這時鉆(zhan)(zhan)頭(tou)(tou)的偏向很難預料(liao)。操作人員在(zai)意識到(dao)鉆(zhan)(zhan)頭(tou)(tou)遇(yu)(yu)到(dao)硬物或(huo)較(jiao)(jiao)(jiao)難鉆(zhan)(zhan)進(jin)情況等微小變化(hua)時,應馬(ma)上停鉆(zhan)(zhan),檢驗鉆(zhan)(zhan)頭(tou)(tou)的位置。此時,應降低(di)鉆(zhan)(zhan)壓,緩(huan)慢(man)給進(jin),讓(rang)鉆(zhan)(zhan)頭(tou)(tou)慢(man)慢(man)地通過該區域(yu)。鉆(zhan)(zhan)進(jin)時,應較(jiao)(jiao)(jiao)頻(pin)繁地檢測(ce)鉆(zhan)(zhan)頭(tou)(tou)的位置。
二:當鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)頭遇到(dao)較(jiao)硬地(di)層,通常需要(yao)加(jia)大(da)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)壓。但是(shi),鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)壓加(jia)大(da)后會引起孔(kong)內鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿彎(wan)(wan)曲。若鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿彎(wan)(wan)曲部位(wei)的(de)(de)地(di)層較(jiao)軟(ruan),彎(wan)(wan)曲的(de)(de)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿會使鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)孔(kong)擴(kuo)大(da)。控(kong)向探(tan)頭只能確定鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)頭的(de)(de)位(wei)置(zhi),很(hen)難確定這種(zhong)由鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿彎(wan)(wan)曲而形(xing)成的(de)(de)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)孔(kong)軌(gui)跡(ji)。在這種(zhong)情況下,要(yao)適當降低鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)壓,嘗(chang)試采用(yong)沖擊(ji)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)進的(de)(de)方法通過硬地(di)層,同時,增加(jia)泵量或(huo)噴(pen)射作用(yong)或(huo)許有(you)助于軟(ruan)化障礙(ai)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!