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:在風化(hua)花崗巖層鉆(zhan)(zhan)(zhan)進過程(cheng)中若鉆(zhan)(zhan)(zhan)頭(tou)(tou)遇到巖脈(mo)或在卵石(shi)層鉆(zhan)(zhan)(zhan)進過程(cheng)中遇到較(jiao)(jiao)大粒徑的(de)(de)卵石(shi)時(shi)(shi),鉆(zhan)(zhan)(zhan)孔軌(gui)跡(ji)都可能較(jiao)(jiao)明顯地偏(pian)離設計軌(gui)跡(ji),這時(shi)(shi)鉆(zhan)(zhan)(zhan)頭(tou)(tou)的(de)(de)偏(pian)向很難預(yu)料。操作人員在意識到鉆(zhan)(zhan)(zhan)頭(tou)(tou)遇到硬(ying)物或較(jiao)(jiao)難鉆(zhan)(zhan)(zhan)進情況等微小變化(hua)時(shi)(shi),應馬上停鉆(zhan)(zhan)(zhan),檢驗鉆(zhan)(zhan)(zhan)頭(tou)(tou)的(de)(de)位置。此時(shi)(shi),應降低鉆(zhan)(zhan)(zhan)壓,緩慢(man)給進,讓鉆(zhan)(zhan)(zhan)頭(tou)(tou)慢(man)慢(man)地通過該區域(yu)。鉆(zhan)(zhan)(zhan)進時(shi)(shi),應較(jiao)(jiao)頻繁地檢測鉆(zhan)(zhan)(zhan)頭(tou)(tou)的(de)(de)位置。
二(er):當(dang)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)頭遇到較(jiao)硬地(di)層,通常需(xu)要加(jia)大(da)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)壓。但是,鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)壓加(jia)大(da)后(hou)會(hui)引起孔內鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)彎曲(qu)。若鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)彎曲(qu)部(bu)位(wei)的(de)(de)地(di)層較(jiao)軟,彎曲(qu)的(de)(de)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)會(hui)使鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)孔擴大(da)。控向(xiang)探頭只(zhi)能(neng)確定(ding)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)頭的(de)(de)位(wei)置,很難確定(ding)這種(zhong)由鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)桿(gan)彎曲(qu)而形成的(de)(de)鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)孔軌(gui)跡(ji)。在這種(zhong)情況(kuang)下,要適(shi)當(dang)降低鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)壓,嘗試采用(yong)沖擊鉆(zhan)(zhan)(zhan)(zhan)(zhan)(zhan)進的(de)(de)方法通過硬地(di)層,同時,增加(jia)泵量或噴射作(zuo)用(yong)或許有助于(yu)軟化(hua)障(zhang)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!