該技術(shu)在我國沿海經(jing)濟發達地區(qu)廣泛(fan)用(yong)于城市地下(xia)給排水(shui)管(guan)道(dao)、石油管(guan)道(dao)、通(tong)訊電纜等各種管(guan)道(dao)的(de)(de)非開挖鋪設。若管(guan)道(dao)右(you)(you)偏(pian)，主頂(ding)千斤(jin)頂(ding)右(you)(you)伸左縮，反(fan)之亦然(ran)。若高程(cheng)與左右(you)(you)同(tong)時有偏(pian)差(cha)，則優(you)先(xian)糾(jiu)正偏(pian)差(cha)大的(de)(de)一面(mian)。頂(ding)管(guan)放線準(zhun)確就能保證頂(ding)管(guan)能按設計要求準(zhun)確進洞。目前，頂(ding)管(guan)施工(gong)(gong)常采用(yong)的(de)(de)施工(gong)(gong)方(fang)法(fa)分為敞開人工(gong)(gong)手掘(jue)式(shi)和密封機械(xie)式(shi)頂(ding)管(guan)施工(gong)(gong)方(fang)法(fa)，其(qi)中機械(xie)式(shi)頂(ding)管(guan)施工(gong)(gong)常用(yong)的(de)(de)施工(gong)(gong)方(fang)法(fa)又有泥水(shui)平(ping)衡式(shi)和土(tu)壓平(ping)衡式(shi)兩種，頂(ding)管(guan)施工(gong)(gong)常用(yong)的(de)(de)管(guan)材(cai)有砼管(guan)、鋼管(guan)、玻璃夾(jia)砂鋼管(guan)。

頂(ding)管(guan)(guan)(guan)(guan)(guan)(guan)施工(gong)降低工(gong)程總造(zao)價。可浪費少(shao)量土(tu)方(fang)工(gong)程、溝管(guan)(guan)(guan)(guan)(guan)(guan)基座資料，增(zeng)加(jia)基坑支護作業的(de)工(gong)程量，增(zeng)加(jia)開(kai)(kai)挖(wa)、回填(tian)和路(lu)面(mian)(mian)修復。非開(kai)(kai)挖(wa)技(ji)術(shu)在(zai)國(guo)外已廣泛(fan)使用，在(zai)國(guo)內也逐漸普(pu)及。不開(kai)(kai)挖(wa)地面(mian)(mian)就能穿越公路(lu)、鐵(tie)路(lu)、河流，甚至能在(zai)建(jian)筑物底下穿過，非開(kai)(kai)挖(wa)管(guan)(guan)(guan)(guan)(guan)(guan)道施工(gong)，是一(yi)種能安全有效地進行(xing)環境保護的(de)施工(gong)方(fang)法。頂(ding)管(guan)(guan)(guan)(guan)(guan)(guan)機械選(xuan)型(xing)取決于地質(zhi)勘探和管(guan)(guan)(guan)(guan)(guan)(guan)徑。管(guan)(guan)(guan)(guan)(guan)(guan)徑有800-5000mm鋼筋混凝土(tu)管(guan)(guan)(guan)(guan)(guan)(guan)，玻璃(li)纖維夾砂管(guan)(guan)(guan)(guan)(guan)(guan)，鋼管(guan)(guan)(guan)(guan)(guan)(guan)之類，依據(ju)管(guan)(guan)(guan)(guan)(guan)(guan)徑大小(xiao)和資料不同，選(xuan)擇不同頂(ding)進機頭(tou)。

頂(ding)(ding)管(guan)(guan)施(shi)(shi)工(gong)在(zai)管(guan)(guan)道(dao)頂(ding)(ding)進(jin)(jin)的(de)(de)(de)全部過程中，應控制頂(ding)(ding)管(guan)(guan)掘(jue)進(jin)(jin)機(ji)前進(jin)(jin)的(de)(de)(de)方(fang)(fang)向，并應根據測量(liang)結果分析偏(pian)差產生的(de)(de)(de)原因(yin)和發(fa)展趨勢，確定(ding)糾偏(pian)的(de)(de)(de)措施(shi)(shi)。挖掘(jue)發(fa)生在(zai)頂(ding)(ding)管(guan)(guan)機(ji)的(de)(de)(de)前方(fang)(fang)，被(bei)挖掘(jue)物(wu)質通(tong)過泥漿(jiang)循(xun)環系統用泵排出，到達地表。頂(ding)(ding)管(guan)(guan)施(shi)(shi)工(gong)的(de)(de)(de)基本原理(li)為：從地面開挖兩個基坑(keng)(keng)井，然(ran)后管(guan)(guan)節(jie)從工(gong)作井安(an)放。一節(jie)管(guan)(guan)子完成頂(ding)(ding)入土層(ceng)之(zhi)后，再下第二節(jie)管(guan)(guan)子繼(ji)續(xu)頂(ding)(ding)進(jin)(jin)。其原理(li)是借助于主頂(ding)(ding)油缸及(ji)管(guan)(guan)道(dao)間、中繼(ji)間等推(tui)力，把工(gong)具(ju)管(guan)(guan)或掘(jue)進(jin)(jin)機(ji)從工(gong)作坑(keng)(keng)內穿過土層(ceng)一直推(tui)進(jin)(jin)到接收坑(keng)(keng)內吊起。管(guan)(guan)道(dao)緊隨工(gong)具(ju)管(guan)(guan)或掘(jue)進(jin)(jin)機(ji)后，埋(mai)設(she)在(zai)兩坑(keng)(keng)之(zhi)間。