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:在風(feng)化花崗巖層鉆(zhan)(zhan)(zhan)進過(guo)(guo)程(cheng)中(zhong)若鉆(zhan)(zhan)(zhan)頭(tou)(tou)遇(yu)(yu)到(dao)巖脈或在卵(luan)(luan)石(shi)層鉆(zhan)(zhan)(zhan)進過(guo)(guo)程(cheng)中(zhong)遇(yu)(yu)到(dao)較(jiao)大粒徑的卵(luan)(luan)石(shi)時(shi)(shi),鉆(zhan)(zhan)(zhan)孔軌跡(ji)都可能較(jiao)明顯地(di)偏離設(she)計軌跡(ji),這時(shi)(shi)鉆(zhan)(zhan)(zhan)頭(tou)(tou)的偏向很難預料。操作人員(yuan)在意識到(dao)鉆(zhan)(zhan)(zhan)頭(tou)(tou)遇(yu)(yu)到(dao)硬物(wu)或較(jiao)難鉆(zhan)(zhan)(zhan)進情況等微小(xiao)變化時(shi)(shi),應馬上(shang)停(ting)鉆(zhan)(zhan)(zhan),檢驗鉆(zhan)(zhan)(zhan)頭(tou)(tou)的位(wei)置。此時(shi)(shi),應降低鉆(zhan)(zhan)(zhan)壓,緩慢(man)(man)給進,讓鉆(zhan)(zhan)(zhan)頭(tou)(tou)慢(man)(man)慢(man)(man)地(di)通過(guo)(guo)該區域。鉆(zhan)(zhan)(zhan)進時(shi)(shi),應較(jiao)頻繁地(di)檢測鉆(zhan)(zhan)(zhan)頭(tou)(tou)的位(wei)置。
二:當(dang)鉆(zhan)(zhan)頭遇到較(jiao)(jiao)硬地(di)(di)層(ceng),通(tong)常需要(yao)加大(da)鉆(zhan)(zhan)壓(ya)。但是,鉆(zhan)(zhan)壓(ya)加大(da)后會引起(qi)孔(kong)內(nei)鉆(zhan)(zhan)桿(gan)彎(wan)(wan)曲。若(ruo)鉆(zhan)(zhan)桿(gan)彎(wan)(wan)曲部位的地(di)(di)層(ceng)較(jiao)(jiao)軟,彎(wan)(wan)曲的鉆(zhan)(zhan)桿(gan)會使鉆(zhan)(zhan)孔(kong)擴大(da)。控(kong)向(xiang)探(tan)頭只能確定鉆(zhan)(zhan)頭的位置(zhi),很難確定這(zhe)種由鉆(zhan)(zhan)桿(gan)彎(wan)(wan)曲而形(xing)成的鉆(zhan)(zhan)孔(kong)軌(gui)跡。在這(zhe)種情況(kuang)下,要(yao)適當(dang)降低(di)鉆(zhan)(zhan)壓(ya),嘗試(shi)采用(yong)沖(chong)擊鉆(zhan)(zhan)進(jin)的方法通(tong)過硬地(di)(di)層(ceng),同時(shi),增加泵量(liang)或(huo)噴(pen)射(she)作用(yong)或(huo)許有助于軟化障礙(ai)物(wu)。
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!