지반-라이닝 상호작용모델을 이용한 터널2차라이닝 설계에 대한 연구
A Study on the Secondary Tunnel Lining Design Using a Ground-Lining Interaction Model
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It is a common practice to install excessive secondary tunnel linings due to the lack of rational insight into the ground loosening load. The main load acting on the secondary lining of a drained tunnel is the ground load caused by the deterioration of the primary support members such as shotcrete, steel ribs, and rockbolts. Accordingly, the analysis of the ground-primary support-secondary lining interaction is very important for a rational design of the secondary tunnel lining. In this paper, the interaction is described by the simple mass-spring model and the load transfer from the primary support to the ground and to the secondary lining is verified by the characteristic curves including the secondary lining reaction curve in the case of the theoretical solution of a circular tunnel. And also, the application of this model to numerical analysis is verified in order to review the potential tool for practical tunnel problems with the complex conditions like non-circular shaped tunnels, multi-layered ground, sequential excavation and so on.
Abstract
It is a common practice to install excessive secondary tunnel linings due to the lack of rational insight into the ground loosening load. The main load acting on the secondary lining of a drained tunnel is the ground load caused by the deterioration of the primary support members such as shotcrete, steel ribs, and rockbolts. Accordingly, the analysis of the ground-primary support-secondary lining interaction is very important for a rational design of the secondary tunnel lining. In this paper, the interaction is described by the simple mass-spring model and the load transfer from the primary support to the ground and to the secondary lining is verified by the characteristic curves including the secondary lining reaction curve in the case of the theoretical solution of a circular tunnel. And also, the application of this model to numerical analysis is verified in order to review the potential tool for practical tunnel problems with the complex conditions like non-circular shaped tunnels, multi-layered ground, sequential excavation and so on.
참고문헌 (7)
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- 이인모, "흙 부직포 시스템에서 투수능 저하현상 투수능 저하현상의 이방성을 중심으로", 대한토목학회 논문집, 20(3), pp.229~242 (2000)
- Goodman R.E., "Introduction to Rock Mechanics" (1980), John Wiley & Sons
- Itasca Consulting Groups, "FLAC Ver. 4.0 Manual, Minneapolis, Minnesota, USA", ~ (2000)
- O’Rourke, T.D., "Guidelines for Tunnel Lining Design", pp.1~23 (1984), ASCE
- Proctor, R.V., "Rock tunneling with steel supports, Commercial shearing & stam, p. 277", ~ (1961)