它的(de)(de)技(ji)術要點在于糾正管(guan)(guan)子在地下(xia)延(yan)伸的(de)(de)偏差。特別適用(yong)于大中(zhong)型(xing)管(guan)(guan)徑(jing)的(de)(de)非(fei)開(kai)挖(wa)鋪設(she)(she)。具有經濟(ji)、，保護環境的(de)(de)綜合功能。頂(ding)(ding)(ding)管(guan)(guan)直徑(jing)DN800—4500。通過(guo)工(gong)(gong)作(zuo)井(jing)把(ba)要頂(ding)(ding)(ding)進(jin)的(de)(de)管(guan)(guan)子頂(ding)(ding)(ding)入接(jie)收井(jing)內，一(yi)個工(gong)(gong)作(zuo)井(jing)內的(de)(de)管(guan)(guan)子可在地下(xia)穿(chuan)行1500米以上，并(bing)且還能曲(qu)線穿(chuan)行，以繞開(kai)一(yi)些地下(xia)管(guan)(guan)線或障礙物。本頂(ding)(ding)(ding)管(guan)(guan)工(gong)(gong)程在頂(ding)(ding)(ding)進(jin)長度超過(guo)100米時，考(kao)慮在機頭(tou)后設(she)(she)置一(yi)只中(zhong)繼(ji)間(jian)，并(bing)采用(yong)觸變泥漿注漿工(gong)(gong)藝(yi)。中(zhong)繼(ji)間(jian)由前(qian)殼體、千斤頂(ding)(ding)(ding)及后殼體組成。

工程地(di)質和水文地(di)質條件沿管(guan)(guan)(guan)線土層變化頻(pin)繁，所以在(zai)頂管(guan)(guan)(guan)施工前必須了解(jie)土層的(de)變化情況(kuang):此外對于要經過回填(tian)土地(di)段(duan)，需(xu)要提前加固處理，以防(fang)頂管(guan)(guan)(guan)施工后地(di)表有(you)過大(da)(da)的(de)下(xia)沉。非開挖(wa)(wa)技術(shu)不開挖(wa)(wa)地(di)面，故而(er)被鋪設管(guan)(guan)(guan)道的(de)上(shang)部土層未(wei)經擾(rao)動，管(guan)(guan)(guan)道的(de)管(guan)(guan)(guan)節端(duan)不易(yi)產生(sheng)段(duan)差變形(xing)，其(qi)(qi)管(guan)(guan)(guan)道壽命(ming)亦大(da)(da)于開挖(wa)(wa)法埋管(guan)(guan)(guan)。采用房下(xia)非開挖(wa)(wa)技術(shu)能節約一(yi)大(da)(da)筆拆費用，減(jian)少動拆用房，縮(suo)短(duan)管(guan)(guan)(guan)線長度。頂管(guan)(guan)(guan)機(ji)通常用于小直徑斷面巖(yan)石(shi)和土體掘(jue)進，其(qi)(qi)中心就是將一(yi)些(xie)本來集成在(zai)盾構機(ji)外部的(de)功用部件拿(na)出來，以減(jian)少其(qi)(qi)尺寸，頂推(tui)安裝在(zai)任務(wu)井里(li)。

穿越建筑時(shi)對基礎(chu)的探(tan)查頂(ding)(ding)(ding)(ding)管在(zai)建筑物基礎(chu)下施(shi)工(gong)(gong)時(shi)，需要(yao)明(ming)確施(shi)工(gong)(gong)施(shi)工(gong)(gong)路(lu)線上(shang)所(suo)遇到的基礎(chu)類型(xing)，對于部分基礎(chu)頂(ding)(ding)(ding)(ding)管頂(ding)(ding)(ding)(ding)進(jin)(jin)前可采取托換、加(jia)固措施(shi)。施(shi)工(gong)(gong)設備(bei)和(he)(he)施(shi)工(gong)(gong)人員的素質是(shi)保(bao)證(zheng)非開挖工(gong)(gong)程質量的另一要(yao)求。非開挖施(shi)工(gong)(gong)設備(bei)的更(geng)新換代十分頻繁，施(shi)工(gong)(gong)廠家要(yao)保(bao)證(zheng)施(shi)工(gong)(gong)所(suo)用設備(bei)為行業 設備(bei)，非開挖施(shi)工(gong)(gong)公司(si)，落后設備(bei)雖然也(ye)能完成工(gong)(gong)程，但工(gong)(gong)程質量和(he)(he)效率有(you)待提高(gao)。頂(ding)(ding)(ding)(ding)進(jin)(jin)施(shi)工(gong)(gong)進(jin)(jin)程中應(ying)嚴厲留意(yi)以下內容：頂(ding)(ding)(ding)(ding)進(jin)(jin)時(shi)，頂(ding)(ding)(ding)(ding)鐵上(shang)不準(zhun)站人；頂(ding)(ding)(ding)(ding)進(jin)(jin)就位后，應(ying)立即回復施(shi)工(gong)(gong)線路(lu)；頂(ding)(ding)(ding)(ding)進(jin)(jin)施(shi)工(gong)(gong)完成后，施(shi)工(gong)(gong)人員必需對管道線路(lu)停止(zhi)(zhi)片面修整與穩固，并停止(zhi)(zhi)相關實驗。