這種技術(shu)的(de)優點是(shi)：不(bu)開挖地面；不(bu)拆，不(bu)破壞(huai)地面建筑物；不(bu)破壞(huai)環境；不(bu)影(ying)響管(guan)(guan)(guan)道(dao)的(de)段(duan)差(cha)變形；省時、、安全，綜合造價低。一(yi)節管(guan)(guan)(guan)子完成頂(ding)(ding)入土層之(zhi)后，再下第二節管(guan)(guan)(guan)子繼(ji)續(xu)頂(ding)(ding)進。其(qi)原理是(shi)借(jie)助于主(zhu)頂(ding)(ding)油缸及(ji)管(guan)(guan)(guan)道(dao)間(jian)、中繼(ji)間(jian)等(deng)推力，把工(gong)(gong)具管(guan)(guan)(guan)或掘(jue)(jue)進機(ji)從工(gong)(gong)作坑內(nei)穿過土層一(yi)直(zhi)推進到接收坑內(nei)吊起。管(guan)(guan)(guan)道(dao)緊隨工(gong)(gong)具管(guan)(guan)(guan)或掘(jue)(jue)進機(ji)后，埋(mai)設(she)在(zai)兩(liang)坑之(zhi)間(jian)。目前，頂(ding)(ding)管(guan)(guan)(guan)施(shi)(shi)工(gong)(gong)常(chang)采(cai)用(yong)的(de)施(shi)(shi)工(gong)(gong)方法分為敞開人工(gong)(gong)手(shou)掘(jue)(jue)式(shi)和(he)密封機(ji)械式(shi)頂(ding)(ding)管(guan)(guan)(guan)施(shi)(shi)工(gong)(gong)方法，其(qi)中機(ji)械式(shi)頂(ding)(ding)管(guan)(guan)(guan)施(shi)(shi)工(gong)(gong)常(chang)用(yong)的(de)施(shi)(shi)工(gong)(gong)方法又有泥水(shui)平衡(heng)式(shi)和(he)土壓平衡(heng)式(shi)兩(liang)種，頂(ding)(ding)管(guan)(guan)(guan)施(shi)(shi)工(gong)(gong)常(chang)用(yong)的(de)管(guan)(guan)(guan)材有砼管(guan)(guan)(guan)、鋼管(guan)(guan)(guan)、玻璃夾砂鋼管(guan)(guan)(guan)。

它(ta)的(de)(de)技術要點在于糾正管(guan)(guan)子在地(di)下延(yan)伸的(de)(de)偏(pian)差。特(te)別適用于大中型管(guan)(guan)徑的(de)(de)非開(kai)挖鋪設。具有經(jing)濟、，保護環境的(de)(de)綜合(he)功能。通過(guo)工作井(jing)(jing)把要頂進(jin)的(de)(de)管(guan)(guan)子頂入(ru)接收井(jing)(jing)內(nei)，一個工作井(jing)(jing)內(nei)的(de)(de)管(guan)(guan)子可在地(di)下穿行(xing)1500米(mi)以上，并且還能曲(qu)線穿行(xing)，以繞開(kai)一些地(di)下管(guan)(guan)線或(huo)障(zhang)礙物。挖掘發生在頂管(guan)(guan)機的(de)(de)前方，被挖掘物質通過(guo)泥漿(jiang)循環系(xi)統用泵排(pai)出，到達地(di)表。頂管(guan)(guan)施(shi)工的(de)(de)基(ji)本原(yuan)理為(wei)：從地(di)面(mian)開(kai)挖兩個基(ji)坑井(jing)(jing)，然后(hou)管(guan)(guan)節從工作井(jing)(jing)安放。

在(zai)有(you)些(xie)工程中(zhong)非(fei)(fei)開(kai)挖(wa)具(ju)有(you)比(bi)較(jiao)(jiao)優(you)勢(shi)非(fei)(fei)開(kai)挖(wa)施(shi)工隨深度增加時成本增加不是太多，而且(qie)還可以(yi)按短的(de)合理路徑穿(chuan)越(yue)河流、湖(hu)泊、鐵路、公路、城市建筑(zhu)(zhu)物等，非(fei)(fei)開(kai)挖(wa)頂管(guan)(guan)施(shi)工報價，施(shi)工，節約(yue)材料(liao)消(xiao)耗，降低施(shi)工費用(yong)，所以(yi)在(zai)某些(xie)工程中(zhong)非(fei)(fei)開(kai)挖(wa)具(ju)有(you)比(bi)較(jiao)(jiao)優(you)勢(shi)。這(zhe)對交通(tong)繁忙、人(ren)口密(mi)集、地(di)面建筑(zhu)(zhu)物眾多、地(di)下管(guan)(guan)線(xian)復雜(za)的(de)城市是非(fei)(fei)常重(zhong)要(yao)的(de)，它(ta)將為(wei)城市創造一個潔凈(jing)、舒(shu)適和美(mei)好的(de)環(huan)境。它(ta)的(de)技術要(yao)點在(zai)于糾正管(guan)(guan)子(zi)在(zai)地(di)下延(yan)伸的(de)偏差(cha)。特別適用(yong)于大(da)中(zhong)型管(guan)(guan)徑的(de)非(fei)(fei)開(kai)挖(wa)鋪設(she)。具(ju)有(you)經濟、，保護環(huan)境的(de)綜合功能(neng)。