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PE拉管(guan)(guan)施(shi)(shi)(shi)工(gong)(gong)(gong)工(gong)(gong)(gong)藝 牽引(yin)管(guan)(guan)施(shi)(shi)(shi)工(gong)(gong)(gong)的(de)(de)(de)關鍵(jian)是(shi)做好(hao)導向孔曲(qu)線(xian)的(de)(de)(de)設(she)計和(he)(he)地(di)(di)(di)(di)(di)(di)質(zhi)勘(kan)察(cha)(cha)(cha)，導向孔的(de)(de)(de)設(she)計和(he)(he)施(shi)(shi)(shi)工(gong)(gong)(gong)受許多因素的(de)(de)(de)制約，其(qi)中(zhong)最主要(yao)的(de)(de)(de)是(shi)施(shi)(shi)(shi)工(gong)(gong)(gong)現(xian)場(chang)(chang)的(de)(de)(de)地(di)(di)(di)(di)(di)(di)上和(he)(he)地(di)(di)(di)(di)(di)(di)下(xia)(xia)(xia)條件(jian)，地(di)(di)(di)(di)(di)(di)上條件(jian)包(bao)括地(di)(di)(di)(di)(di)(di)形，地(di)(di)(di)(di)(di)(di)貌以及周圍建筑物、道路(lu)等；地(di)(di)(di)(di)(di)(di)下(xia)(xia)(xia)情況包(bao)括原有地(di)(di)(di)(di)(di)(di)下(xia)(xia)(xia)管(guan)(guan)線(xian)，地(di)(di)(di)(di)(di)(di)下(xia)(xia)(xia)水(shui)和(he)(he)地(di)(di)(di)(di)(di)(di)質(zhi)結構等。因此，在(zai)(zai)導向孔設(she)計和(he)(he)施(shi)(shi)(shi)工(gong)(gong)(gong)前必須進行(xing)(xing)詳細的(de)(de)(de)現(xian)場(chang)(chang)勘(kan)察(cha)(cha)(cha)，取得第一手的(de)(de)(de)地(di)(di)(di)(di)(di)(di)質(zhi)資料。 現(xian)場(chang)(chang)勘(kan)察(cha)(cha)(cha)內容(rong)包(bao)括：原有地(di)(di)(di)(di)(di)(di)下(xia)(xia)(xia)管(guan)(guan)線(xian)及設(she)施(shi)(shi)(shi)的(de)(de)(de)直徑(jing)和(he)(he)埋深，原有電纜線(xian)路(lu)的(de)(de)(de)走向等情況，并在(zai)(zai)地(di)(di)(di)(di)(di)(di)面作好(hao)標記(ji)，穿(chuan)越地(di)(di)(di)(di)(di)(di)層(ceng)的(de)(de)(de)土質(zhi)類型、含水(shui)量、透水(shui)性(xing)。 對于地(di)(di)(di)(di)(di)(di)下(xia)(xia)(xia)管(guan)(guan)線(xian)的(de)(de)(de)勘(kan)察(cha)(cha)(cha)主要(yao)是(shi)三種方法：(1)人工(gong)(gong)(gong)勘(kan)察(cha)(cha)(cha)，(2)儀器勘(kan)察(cha)(cha)(cha)，(3)間接勘(kan)察(cha)(cha)(cha)。施(shi)(shi)(shi)工(gong)(gong)(gong)前先將(jiang)牽引(yin)管(guan)(guan)工(gong)(gong)(gong)作井位(wei)置(zhi)的(de)(de)(de)綠(lv)化進行(xing)(xing)遷移(yi)，在(zai)(zai)拉管(guan)(guan)施(shi)(shi)(shi)工(gong)(gong)(gong)結束后再按(an)原樣恢復。為(wei)了(le)使(shi)施(shi)(shi)(shi)工(gong)(gong)(gong)過(guo)程中(zhong)盡量不給(gei)交通(tong)安全、城市環(huan)境及周圍群眾正(zheng)常生活帶來(lai)影(ying)響(xiang)，在(zai)(zai)不影(ying)響(xiang)正(zheng)常施(shi)(shi)(shi)工(gong)(gong)(gong)的(de)(de)(de)前提下(xia)(xia)(xia)在(zai)(zai)施(shi)(shi)(shi)工(gong)(gong)(gong)現(xian)場(chang)(chang)周圍（即出(chu)、入(ru)口和(he)(he)泥漿池(chi)周圍）用磚基礎彩(cai)鋼瓦加以保護和(he)(he)隔離。