非開(kai)挖(wa)具有環保(bao)宜(yi)居等競爭優勢。一個城市(shi)的(de)開(kai)挖(wa)量(liang)超過一定比例，必然影(ying)響交通(tong)和市(shi)民正常生活(huo)。而非開(kai)挖(wa)施工(gong)不(bu)阻礙交通(tong)、不(bu)污染(ran)環境、不(bu)破(po)壞(huai)植(zhi)被、不(bu)影(ying)響周邊(bian)建筑物、不(bu)影(ying)響居民的(de)一切正常生活(huo)和工(gong)作秩序(xu)。經過多年的(de)發展，頂管(guan)技(ji)(ji)術(shu)在我國已(yi)得(de)到大(da)量(liang)地實際(ji)工(gong)程應(ying)用(yong)，且保(bao)持(chi)著高速的(de)增長(chang)勢頭，無論在技(ji)(ji)術(shu)上(shang)、頂管(guan)設備還是施工(gong)工(gong)藝(yi)上(shang)取得(de)了(le)很大(da)的(de)進步，在某(mou)些方面甚(shen)至已(yi)達到了(le)水平。地下管(guan)線是城市(shi)基礎設施的(de)重(zhong)要組成部(bu)分，電纜(lan)管(guan)、上(shang)下水管(guan)網、熱力(動力)管(guan)道同(tong)地下鐵(tie)道一起，被稱為城市(shi)的(de)生命線，隨著社會的(de)發展，地下管(guan)線的(de)長(chang)度持(chi)續增加。

頂進(jin)(jin)施(shi)(shi)(shi)工(gong)(gong)進(jin)(jin)程中應嚴厲留意(yi)以下內容(rong)：頂進(jin)(jin)時(shi)，頂鐵上不(bu)(bu)準站人(ren)；頂進(jin)(jin)就位后(hou)，非開挖管(guan)道(dao)施(shi)(shi)(shi)工(gong)(gong)公(gong)司，應立即(ji)回(hui)復(fu)施(shi)(shi)(shi)工(gong)(gong)線(xian)路(lu)；頂進(jin)(jin)施(shi)(shi)(shi)工(gong)(gong)完(wan)成后(hou)，施(shi)(shi)(shi)工(gong)(gong)人(ren)員必需對(dui)管(guan)道(dao)線(xian)路(lu)停止(zhi)片面修整與穩固，并(bing)停止(zhi)相關實驗。采用(yong)通(tong)風裝置予以解(jie)決。前探(tan)查(cha)地(di)下管(guan)線(xian)盡管(guan)的(de)頂管(guan)設(she)(she)備具有(you)在(zai)施(shi)(shi)(shi)工(gong)(gong)時(shi)探(tan)查(cha)前進(jin)(jin)路(lu)線(xian)不(bu)(bu)遠距離管(guan)線(xian)的(de)能力(li)，確保公(gong)眾正常生活仍有(you)必要。沉(chen)井(jing)，先施(shi)(shi)(shi)工(gong)(gong)井(jing)壁(bi)，后(hou)先沉(chen)，到(dao)設(she)(she)計標高，進(jin)(jin)行封底；逆(ni)做法(fa)：先開挖一(yi)段(duan)(duan)深(shen)度，后(hou)做井(jing)壁(bi)，再(zai)開挖一(yi)段(duan)(duan)深(shen)度，后(hou)做井(jing)壁(bi)，施(shi)(shi)(shi)工(gong)(gong)到(dao)設(she)(she)計標高進(jin)(jin)行封底。兩(liang)種辦(ban)法(fa)各有(you)優(you)點，也(ye)有(you)工(gong)(gong)程穿插采用(yong)施(shi)(shi)(shi)工(gong)(gong)辦(ban)法(fa)。

一節管(guan)(guan)子完成頂(ding)(ding)(ding)入土(tu)層之(zhi)后，再下第二節管(guan)(guan)子繼續頂(ding)(ding)(ding)進(jin)(jin)。其原理是借助(zhu)于主頂(ding)(ding)(ding)油缸及(ji)管(guan)(guan)道間(jian)、中繼間(jian)等推力(li)，把工具管(guan)(guan)或掘進(jin)(jin)機從工作(zuo)坑(keng)內穿過土(tu)層一直推進(jin)(jin)到(dao)接(jie)(jie)收坑(keng)內吊起。管(guan)(guan)道緊隨工具管(guan)(guan)或掘進(jin)(jin)機后，埋設(she)在兩坑(keng)之(zhi)間(jian)。分(fen)(fen)壓環(huan)制作(zuo)具有足(zu)夠的剛(gang)性，與管(guan)(guan)端面(mian)接(jie)(jie)觸相對(dui)平整，無變形(xing)。在長距離(li)頂(ding)(ding)(ding)進(jin)(jin)過程中，當頂(ding)(ding)(ding)進(jin)(jin)阻力(li)超過容許總頂(ding)(ding)(ding)力(li)時，無法一次達到(dao)頂(ding)(ding)(ding)進(jin)(jin)距離(li)時，須設(she)置中繼間(jian)分(fen)(fen)段接(jie)(jie)力(li)頂(ding)(ding)(ding)進(jin)(jin)。這種技術的優點(dian)是：不(bu)開挖地面(mian)；不(bu)拆，不(bu)破壞(huai)地面(mian)建筑物(wu)；不(bu)破壞(huai)環(huan)境；不(bu)影響管(guan)(guan)道的段差(cha)變形(xing)；省時、、安全，綜合造價低。