制約長距離(li)頂(ding)管的一個重要因素是推力(li)陽9’3引(yin)，頂(ding)管工程的設計施工中，工作坑、管道材料、中繼站、其他設備，都(dou)要以頂(ding)管頂(ding)進阻…

1、當工具管前(qian)面刃腳切入(ru)土(tu)(tu)中，會引起前(qian)方(fang)土(tu)(tu)體(ti)松動而坍塌，周(zhou)圍土(tu)(tu)體(ti)也會松動。 2、每一次(ci)土(tu)(tu)體(ti)的取出，都是同過挖除(chu)工作面范圍…

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泥水平(ping)衡頂(ding)管施(shi)(shi)工(gong)(gong)(gong)工(gong)(gong)(gong)法是(shi)用泥水平(ping)衡頂(ding)管機(ji)施(shi)(shi)工(gong)(gong)(gong)的一(yi)種(zhong)頂(ding)管施(shi)(shi)工(gong)(gong)(gong)工(gong)(gong)(gong)藝。它在(zai)施(shi)(shi)工(gong)(gong)(gong)時(shi)通過(guo)進水管向(xiang)頂(ding)管機(ji)刀盤后的泥水艙內(nei)供給(gei)一(yi)定比重(zhong)、…