CAJ | 학술논문

近年来，随着中国城市大规模建设，在地铁、市政道路等工程地质勘察中经常因物探测试而在钻孔中遗留下大量的PVC保护管，造成拔管、封孔不及时且耗时、耗力等问题。以武汉市轨道交通7号线一期工程岩溶专项勘察中拔管、封孔为例，介绍一种专利产品———DZK拔管封孔器的研发与使用情况，其为一种提高类似项目拔管、封孔工作效率的施工方法。
근년래，수착중국성시대규모건설，재지철、시정도로등공정지질감찰중경상인물탐측시이재찬공중유류하대량적PVC보호관，조성발관、봉공불급시차모시、모력등문제。이무한시궤도교통7호선일기공정암용전항감찰중발관、봉공위례，개소일충전리산품———DZK발관봉공기적연발여사용정황，기위일충제고유사항목발관、봉공공작효솔적시공방법。
In recent years ,as large-scale construction in China ,the problems often occur in the subway ,municipal roads and other projects in geological survey that lots of PVC protective tube left in the borehole because of geophysical tests . It caused extubation,sealing is not timely and time-consuming,labor-intensive.In this paper,karst special reconnais-sance extubation ,sealing of Wuhan Rail Transit on the 7 th Line as an example ,it describes the development and use of a patented product ( DZK extubation sealing device ) which improve extubation ,sealing efficiency of similar projects using this product and method .