在(zai)(zai)有(you)些工(gong)(gong)程中非(fei)開(kai)挖(wa)具(ju)有(you)比(bi)較優勢非(fei)開(kai)挖(wa)施(shi)(shi)(shi)工(gong)(gong)隨深度增(zeng)(zeng)加(jia)時成本增(zeng)(zeng)加(jia)不(bu)是(shi)太多，而且還可以(yi)按短的(de)(de)合(he)理路徑穿越河(he)流、湖泊、鐵路、公路、城(cheng)市建筑物等，非(fei)開(kai)挖(wa)頂管(guan)施(shi)(shi)(shi)工(gong)(gong)廠家價格，施(shi)(shi)(shi)工(gong)(gong)，節約材(cai)料消耗，降(jiang)低施(shi)(shi)(shi)工(gong)(gong)費用，所以(yi)在(zai)(zai)某(mou)些工(gong)(gong)程中非(fei)開(kai)挖(wa)具(ju)有(you)比(bi)較優勢。這(zhe)對(dui)交通(tong)繁(fan)忙、人口密(mi)集、地(di)面(mian)建筑物眾多、地(di)下(xia)(xia)管(guan)線復雜的(de)(de)城(cheng)市是(shi)非(fei)常(chang)重要的(de)(de)，它將(jiang)為城(cheng)市創造一個潔凈、舒適和(he)美好的(de)(de)環(huan)境。它的(de)(de)技術要點在(zai)(zai)于糾正管(guan)子在(zai)(zai)地(di)下(xia)(xia)延伸的(de)(de)偏差。特(te)別適用于大中型管(guan)徑的(de)(de)非(fei)開(kai)挖(wa)鋪設。具(ju)有(you)經濟、，保護環(huan)境的(de)(de)綜合(he)功能。

一節管(guan)子(zi)完(wan)成(cheng)頂(ding)(ding)(ding)(ding)入土層之后，再下第二節管(guan)子(zi)繼(ji)(ji)續頂(ding)(ding)(ding)(ding)進(jin)。其(qi)原理是(shi)借助(zhu)于主頂(ding)(ding)(ding)(ding)油缸及(ji)管(guan)道間、中繼(ji)(ji)間等推(tui)力，把工(gong)具(ju)管(guan)或掘進(jin)機從工(gong)作坑內穿過(guo)(guo)土層一直推(tui)進(jin)到接(jie)收坑內吊起。管(guan)道緊隨工(gong)具(ju)管(guan)或掘進(jin)機后，埋設(she)在兩坑之間。分壓(ya)環(huan)制作具(ju)有(you)足夠(gou)的(de)剛性，與管(guan)端面(mian)接(jie)觸(chu)相(xiang)對平(ping)整，無變(bian)形(xing)。在長距(ju)離頂(ding)(ding)(ding)(ding)進(jin)過(guo)(guo)程中，當頂(ding)(ding)(ding)(ding)進(jin)阻力超過(guo)(guo)容許(xu)總頂(ding)(ding)(ding)(ding)力時，無法一次達到頂(ding)(ding)(ding)(ding)進(jin)距(ju)離時，須設(she)置中繼(ji)(ji)間分段(duan)接(jie)力頂(ding)(ding)(ding)(ding)進(jin)。這種(zhong)技術的(de)優點是(shi)：不(bu)(bu)開挖地面(mian)；不(bu)(bu)拆，不(bu)(bu)破(po)壞(huai)地面(mian)建筑(zhu)物；不(bu)(bu)破(po)壞(huai)環(huan)境(jing)；不(bu)(bu)影響管(guan)道的(de)段(duan)差變(bian)形(xing)；省時、、安全，綜合造價低(di)。

開端(duan)啟(qi)動機(ji)(ji)械(xie)，將(jiang)水(shui)送入土層，同(tong)時(shi)轉動機(ji)(ji)頭(tou)(tou)，將(jiang)土變成泥漿，抽出排出泥漿，機(ji)(ji)頭(tou)(tou)后方(fang)呈現空(kong)泛，啟(qi)動千斤頂將(jiang)管(guan)(guan)道和機(ji)(ji)頭(tou)(tou)一同(tong)頂入土層。如(ru)此循環(huan)，將(jiang)機(ji)(ji)頭(tou)(tou)頂至承(cheng)受井(jing)，打鑿(zao)后，吊出機(ji)(ji)頭(tou)(tou)就完(wan)成一段機(ji)(ji)械(xie)頂管(guan)(guan)。采用(yong)通風裝置予以(yi)解決。前(qian)探(tan)(tan)查(cha)地下管(guan)(guan)線(xian)盡管(guan)(guan)的(de)頂管(guan)(guan)設(she)備具有在施(shi)工時(shi)探(tan)(tan)查(cha)前(qian)進路線(xian)不遠距離管(guan)(guan)線(xian)的(de)能力，確保(bao)公眾正常生(sheng)活(huo)仍有必要。成套頂管(guan)(guan)機(ji)(ji)械(xie)進入現場后，將(jiang)控制柜放在頂管(guan)(guan)井(jing)一側，略微離井(jing)邊一點，方(fang)便操(cao)作人員看(kan)到井(jing)下頂進狀況(kuang)。先澆筑好背靠(kao)墻，裝置導軌，千斤頂，打鑿(zao)好洞口，吊管(guan)(guan)下井(jing)，裝置好進水(shui)管(guan)(guan)和出泥管(guan)(guan)。