All Issue

2018 Vol.20, Issue 5 Preview Page
Study on performance verification of dual-purpose rockbolt for reinforcement and drainage

지반 보강과 배수를 위한 이중기능 록볼트 성능 검증에 관한 연구

Young-Hoon Jung1
,
Doo-Rae Kim2
,
Kyeong-Cheol Kim3
,
Jong-Ho Shin4*
정 영훈1
,
김 두래2
,
김 경철3
,
신 종호4*
1Graduate Student, Dept. of Civil Engineering, Konkuk University
2Engineer, Dept. of Urban infrastructure Planning, ESCO Consultant and Engineers Company
3Engineer, Geotechnical Engineering and Tunnel Dept., Dasan Consultants
4Professor, Dept. of Civil and Environmental Engineering, Konkuk University
1건국대학교 인프라시스템공학과 석사과정
2에스코 컨설턴트 도시기반시설본부 대리
3다산 컨설턴트 지반터널부 사원
4건국대학교 사회환경공학부 정교수
* Corresponding Author
30 September 2018. pp. 869-886
PDF XML Citation
Abstract

Rockbolt is one of the most common supports used to reinforce discontinuous rock during underground excavation. Extra drain pipes are installed to improve excavation workability and the anchorage of rockbolts in water bearing ground. The drain pipe is effective in improving the workability by providing drainage path, but it is difficult to expect the reinforcement effect, increasing disturbance of the discontinuous rock mass and the construction cost. To solve this problem, dual purpose rockbolt (DPR) has been developed for the reinforcement of rock and the drainage of ground water. DPR was able to improve the mechanical and hydraulic stability of the rocks quickly and economically. Two kinds of DPRs using FRP (Fiber Reinforced Plastic) and steel were investigated for the mechanical and hydraulic performance. Also, the workability and stability of DPR were analyzed.

Keywords
Dual purpose rockbolt
Stability
Ground water
Fiber reinforced plastic
Expandable steel pipe

록볼트는 지하굴착 중 불연속 암반을 보강하기 위하여 흔히 사용하는 대표적인 지보재 중의 하나이다. 용수가 많은 현장에서는 굴착 시공성을 개선하고 록볼트의 정착효과를 증진하기 위하여 별도의 Drain pipe 설치하게 된다. Drain pipe는 배수경로를 제공하여 작업성 개선에 효과적이지만 지반보강효과를 기대하기 어렵고, 다수 설치 시 불연속 암반의 교란을 증가시키며, 공사비 증가 요인이 된다. 이러한 문제를 개선하기 위하여 암반의 보강과 배수를 겸한 Dual purpose rockbolt (DPR)를 개발하였다. DPR은 신속하고, 경제적으로 암반의 역학적 ․ 수리적 안정성을 개선할 수 있었다. FRP (유리섬유 보강 플라스틱)와 steel을 이용한 2가지 DPR을 개발하여 역학적 ․ 수리적 성능을 검토하였고, 시공성과 안정성을 분석하였다.

키워드
이중기능 록볼트
안정성
지하수
유리섬유 보강 플라스틱
팽창형 강관
References
1
Fang, Y., Guo, J., Grasmick, J., Mooney, M. (2016), “The effect of external water pressure on the liner behavior of large cross-section tunnels”, Tunnelling and Underground Space Technology, Vol. 60, pp. 80-95.
10.1016/j.tust.2016.07.009
2
Joo, E.J., Shin, J.H. (2014), “Relationship between water pressure and inflow rate in underwater tunnels and buried pipes”, Geotechnique, Vol. 64, No. 3, pp. 226-231.
10.1680/geot.12.P.185
3
Jun, D.C., Kim, K.L., Hong, E.J., Kim, C.D., Lee, Y.J., Hong, C.H. (2017) “The review about ultra long subsea tunnel design under high water pressure”, Journal of Korean Tunnelling and Underground Space Association, Vol. 19, No. 6, pp. 829-843.
4
Kim, H.W., Jeon, S.W., Park, E.S. (2012), “Evaluation of monitoring items for adverse ground conditions in subsea tunneling”, Tunnelling and Underground Space Technology, Vol. 32, pp. 19-33.
10.1016/j.tust.2012.05.001
5
Meijers, P. (1967), “Doubly-periodic stress distributions in perforated plates”, Ph.D. Thesis, Delft University of Technology, Netherland, pp.134-149
6
Nilsen, B. (2014), “Characteristics of water ingress in Norwegian subsea tunnels”, Rock mechanics and rock engineering, Vol. 47, No. 3, pp. 933-945.
10.1007/s00603-012-0300-8
7
Nilsen, B., Palmström, A., Stille, H. (1999), “Quality control of a subsea tunnel project in complex ground conditions”, Proceedings of the ITA World Tunnel Congress Oslo, Norway, pp. 137-145.
8
Park, E.S., Shin, H.S., Cheon, D.S., Jung, Y.B. (2013) “Management and concept of the monitoring system considering the characteristics of subsea tunnels”, Journal of Korean Tunnelling and Underground Space Association, Vol. 15, No. 5, pp. 523-536
10.9711/KTAJ.2013.15.5.523
9
Shin, H.S., Youn, D.J., Chae, S.E., Shin, J.H., (2009), “Effective control of pore water pressures on tunnel linings using pin-hole drain method”, Tunnelling and Underground Space Technology, Vol. 24, No. 5, pp. 555-561.
10.1016/j.tust.2009.02.006
10
You, K.H., Lee, K.H. (2006), “Influence of pore pressure behind a subsea tunnel on its stability”, Journal of Korean Tunnelling and Underground Space Association, Vol. 8, No. 4, pp. 355-363.
10.9711/KTAJ.2016.18.4.355
Information
  • Publisher :Korean Tunneling and Underground Space Association
  • Publisher(Ko) :한국터널지하공간학회
  • Journal Title :Journal of Korean Tunnelling and Underground Space Association
  • Journal Title(Ko) :한국터널지하공간학회 논문집
  • Volume : 20
  • No :5
  • Pages :869-886
  • Received Date : 2018-07-19
  • Revised Date : 2018-08-13
  • Accepted Date : 2018-08-16
  • DOI :https://doi.org/10.9711/KTAJ.2018.20.5.869
Journal Informaiton Journal of Korean Tunnelling and Underground Space Association Journal of Korean Tunnelling and Underground Space Association
Online Submission & Review System
  • NRF
  • KOFST
  • KISTI Current Status
  • KISTI Cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close