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http://dx.doi.org/10.14346/JKOSOS.2015.30.1.047

A Study on Sites Application of Non-open-cut Tunnel Method with Slot Holes in Steel Pipe Pumping  

Chae, Young-Suk (Department of Architecture Engineering, Woosong University)
Song, Kwan-Kwon (Department of Civil Engineering, North Eastern University)
Min, In-Ki (Department of Railroad and Civil Engineering, Woosong Information University)
Publication Information
Journal of the Korean Society of Safety / v.30, no.1, 2015 , pp. 47-51 More about this Journal
Abstract
In the study, a new non-open cut tunnel steel pipe method using slot hole has been developed. As is overcomes shortcomings of conventional methods, it is applied to the field. The main concept of the new method is the steel pipe pumping system with slot holes which, by means of formation slot holes between each steel pipe, applied to the magnitude of the relaxed earth pressure caused by excavation to the ground to prevent ground displacement. The stability of the support members and effect of displacement control of the new method were verified through several ways as numerical analysis and site test. The new method was applied to the construction of a 11.5m wide, 7.4m high and 50m long section that passes side subway and large buildings in inner city. By applying the new method, tunnel construction was successfully completed in 6 months. It decreases the construction period to 30% compared to that of conventional methods, and ground was almost negligible.
Keywords
non-open cut; large steel pipe; slot-hole; ground displacement;
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