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)(zai)風(feng)化(hua)花崗巖層(ceng)鉆(zhan)(zhan)(zhan)進(jin)(jin)過(guo)(guo)程中若鉆(zhan)(zhan)(zhan)頭(tou)(tou)(tou)遇到(dao)巖脈(mo)或在(zai)(zai)卵石層(ceng)鉆(zhan)(zhan)(zhan)進(jin)(jin)過(guo)(guo)程中遇到(dao)較大粒徑(jing)的(de)(de)卵石時(shi),鉆(zhan)(zhan)(zhan)孔軌跡(ji)都可能較明顯地(di)偏(pian)離設計(ji)軌跡(ji),這時(shi)鉆(zhan)(zhan)(zhan)頭(tou)(tou)(tou)的(de)(de)偏(pian)向很難預料。操作人員在(zai)(zai)意(yi)識到(dao)鉆(zhan)(zhan)(zhan)頭(tou)(tou)(tou)遇到(dao)硬物(wu)或較難鉆(zhan)(zhan)(zhan)進(jin)(jin)情況等(deng)微小變化(hua)時(shi),應馬上停鉆(zhan)(zhan)(zhan),檢驗鉆(zhan)(zhan)(zhan)頭(tou)(tou)(tou)的(de)(de)位(wei)置(zhi)。此(ci)時(shi),應降低鉆(zhan)(zhan)(zhan)壓,緩慢給進(jin)(jin),讓鉆(zhan)(zhan)(zhan)頭(tou)(tou)(tou)慢慢地(di)通過(guo)(guo)該區域。鉆(zhan)(zhan)(zhan)進(jin)(jin)時(shi),應較頻繁地(di)檢測鉆(zhan)(zhan)(zhan)頭(tou)(tou)(tou)的(de)(de)位(wei)置(zhi)。
二(er):當鉆(zhan)(zhan)(zhan)(zhan)頭遇到(dao)較硬(ying)地(di)(di)層,通常需要加大(da)鉆(zhan)(zhan)(zhan)(zhan)壓。但是(shi),鉆(zhan)(zhan)(zhan)(zhan)壓加大(da)后(hou)會引(yin)起(qi)孔(kong)內鉆(zhan)(zhan)(zhan)(zhan)桿彎(wan)(wan)曲。若鉆(zhan)(zhan)(zhan)(zhan)桿彎(wan)(wan)曲部位(wei)的(de)地(di)(di)層較軟(ruan),彎(wan)(wan)曲的(de)鉆(zhan)(zhan)(zhan)(zhan)桿會使鉆(zhan)(zhan)(zhan)(zhan)孔(kong)擴(kuo)大(da)。控向探頭只能確定(ding)鉆(zhan)(zhan)(zhan)(zhan)頭的(de)位(wei)置,很難(nan)確定(ding)這種(zhong)(zhong)由鉆(zhan)(zhan)(zhan)(zhan)桿彎(wan)(wan)曲而形成的(de)鉆(zhan)(zhan)(zhan)(zhan)孔(kong)軌跡(ji)。在這種(zhong)(zhong)情況下,要適(shi)當降低(di)鉆(zhan)(zhan)(zhan)(zhan)壓,嘗試采用沖擊鉆(zhan)(zhan)(zhan)(zhan)進的(de)方法通過(guo)硬(ying)地(di)(di)層,同時,增加泵量或噴射(she)作用或許有助于軟(ruan)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!