頂(ding)管直徑DN800—4500。通過(guo)工作(zuo)井把要(yao)頂(ding)進的管子頂(ding)入接收井內，一個工作(zuo)井內的管子可在(zai)地(di)下穿行1500米以上，并且還(huan)能曲線(xian)穿行，以繞開一些地(di)下管線(xian)或障礙物。無論是(shi)各(ge)行業部門(men)規劃不到位，協(xie)調不好(hao)，還(huan)是(shi)基建(jian)發展需要(yao)，新(xin)的地(di)下設施總在(zai)不斷增加，這(zhe)時要(yao)么開挖，要(yao)么非開挖，必然選擇(ze)其(qi)一。根據地(di)質報告，并結(jie)合的施工經驗(yan)，頂(ding)管機(ji)頭決定(ding)采用氣壓(ya)平衡網(wang)格（水(shui)沖）式(shi)機(ji)頭進行施工。該機(ji)頭在(zai)頂(ding)進過(guo)程中，通過(guo)氣壓(ya)平衡正面土壓(ya)穩定(ding)機(ji)頭，減少外部土體(ti)對(dui)周圍地(di)面的影響。

穿(chuan)越建筑時對基礎(chu)的(de)(de)探查頂(ding)(ding)管(guan)(guan)在建筑物(wu)基礎(chu)下施(shi)工(gong)(gong)時，需要(yao)明確施(shi)工(gong)(gong)施(shi)工(gong)(gong)路線(xian)(xian)上(shang)所遇到的(de)(de)基礎(chu)類型(xing)，對于部(bu)分基礎(chu)頂(ding)(ding)管(guan)(guan)頂(ding)(ding)進(jin)前可采取(qu)托(tuo)換、加固措施(shi)。施(shi)工(gong)(gong)設(she)備(bei)和(he)施(shi)工(gong)(gong)人員的(de)(de)素質是(shi)保證非開(kai)挖工(gong)(gong)程(cheng)質量的(de)(de)另一要(yao)求。非開(kai)挖施(shi)工(gong)(gong)設(she)備(bei)的(de)(de)更新換代(dai)十分頻繁，施(shi)工(gong)(gong)廠家要(yao)保證施(shi)工(gong)(gong)所用設(she)備(bei)為行業 設(she)備(bei)，落(luo)后設(she)備(bei)雖然也能完(wan)成(cheng)工(gong)(gong)程(cheng)，但工(gong)(gong)程(cheng)質量和(he)效率有待提高。頂(ding)(ding)進(jin)施(shi)工(gong)(gong)進(jin)程(cheng)中(zhong)應嚴厲留意以下內容：頂(ding)(ding)進(jin)時，頂(ding)(ding)鐵上(shang)不準站人；頂(ding)(ding)進(jin)就位后，應立即回(hui)復施(shi)工(gong)(gong)線(xian)(xian)路；頂(ding)(ding)進(jin)施(shi)工(gong)(gong)完(wan)成(cheng)后，施(shi)工(gong)(gong)人員必(bi)需對管(guan)(guan)道線(xian)(xian)路停止(zhi)片面修整與穩(wen)固，并停止(zhi)相關實驗。

頂(ding)管(guan)施工(gong)降低工(gong)程(cheng)(cheng)總(zong)造(zao)價。可浪費少量土(tu)(tu)方(fang)工(gong)程(cheng)(cheng)、溝管(guan)基座(zuo)資料，增加基坑(keng)支護作業的(de)工(gong)程(cheng)(cheng)量，增加開挖(wa)、回填和(he)路面修復。由于地質(zhi)強(qiang)(qiang)度不(bu)同(tong)，需選用不(bu)同(tong)的(de)機頭(tou)。強(qiang)(qiang)度大巖(yan)層，需選用具有破巖(yan)機頭(tou)；普通土(tu)(tu)質(zhi)，可以選用泥水均衡(heng)頂(ding)管(guan)機械進行施工(gong)即可。無(wu)論是任(ren)務(wu)井(jing)，亦或是接納井(jing)，頂(ding)管(guan)非開挖(wa)施工(gong)報價，均需采用2次澆筑成型的(de)施工(gong)方(fang)案(an)，當(dang)次混凝土(tu)(tu)澆筑強(qiang)(qiang)度到達設(she)計要(yao)求(qiu)，才干停止上部混凝土(tu)(tu)井(jing)壁的(de)澆筑，但必需保證延續澆筑，不(bu)允(yun)許存在施工(gong)縫狀況。