| Title |
Applicability Analysis of an Improved Multistep Steel Pipe Grouting Method in Shallow Depth Railway Tunnels in Considering Safety and Constructability |
| Authors |
김낙석(Kim, Nakseok) ; 최기성(Choi, Gisung) ; 김석현(Kim, Seokhyun) |
| DOI |
https://doi.org/10.12652/Ksce.2020.40.1.0097 |
| Keywords |
저 토피 지층;철도터널;강관다단 그라우팅;적용성 분석 Shallow depth;Railway tunnel;Steel pipe multistep grouting;Applicability analysis |
| Abstract |
The newly improved multistep steel pipe grouting method was applied to an existing steel pipe-reinforced grouting method. It was applied in order to prevent a damage caused by ground failure from excessive grouting pressure in a tunnel construction. The tunnel goes under a highway and a ramp connected to a rest area on OO highway with 11.3~12.1 m depth cover and is a part of roadbed facility construction section ordered by OO public corporation. The improved grouting method provides pre-construction work condition assessment technique through new water injection limit test and grouting effect assessment technique by grouting type assessment. It also includes assessments on interval of joints, appropriate grouting pressure, and optimal operation time to be applied to current operations. Application of the grouting method allowed the smooth road management in shallow-depth grouting construction area located upper part of tunnel excavation. Moreover, the possibility of the application of the method not only to shallow-depth grouting construction but also to various steel pipe-reinforced grouting constructions was confirmed. |