저토피 지반내 터널의 이론적 안정해석
The Theoretical stability Analysis of Tunnels in Shallow Grounds
0
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
A stability analysis of tunnels in shallow reinforced grounds was performed topropose the simplified theoretical analysis method, which can estimate the vertical earthpressure on crown of tunnels. First, the vertical earth pressure acting on crown of tunnels was estimated by applyingthe cylindrical cavity expansion theory. Also, the results estimated by the theoreticalanalysis method were compared with the results by numerical analysis for the actualtunnels in field. According to this study, the following conclusions can be drawn. In the case of reinforcement of surface ground over shallow tunnels, the results bytheoretical analysis show good aggreements with those by numerical analysis before andafter the ground reinforcement. Therefore, the cylinfrical cavity expansion theory issuitable to investigate the stability of shallow tunnels by estimating simply the veriticalearth pressure acting on the tunnel crown. On the other hand, in case of excavation of surface ground over existing urban shallowtunnels, the stability of the tunnels is getting to be reduced according to the excavation. The results by the theoretical analysis in this case showed good agreement qualitativelywith results by the numerical analysis.
Abstract
A stability analysis of tunnels in shallow reinforced grounds was performed topropose the simplified theoretical analysis method, which can estimate the vertical earthpressure on crown of tunnels. First, the vertical earth pressure acting on crown of tunnels was estimated by applyingthe cylindrical cavity expansion theory. Also, the results estimated by the theoreticalanalysis method were compared with the results by numerical analysis for the actualtunnels in field. According to this study, the following conclusions can be drawn. In the case of reinforcement of surface ground over shallow tunnels, the results bytheoretical analysis show good aggreements with those by numerical analysis before andafter the ground reinforcement. Therefore, the cylinfrical cavity expansion theory issuitable to investigate the stability of shallow tunnels by estimating simply the veriticalearth pressure acting on the tunnel crown. On the other hand, in case of excavation of surface ground over existing urban shallowtunnels, the stability of the tunnels is getting to be reduced according to the excavation. The results by the theoretical analysis in this case showed good agreement qualitativelywith results by the numerical analysis.
참고문헌 (11)
- Atkinson, J.H, "Stability of a Shallow Circular Tunnel in Cohensionless Soil", Geotechniqye, 27(2), pp.203~215 (1977)
- Balla, A,, "Rock Pressure Determined from Shearing Resistance", Proc. Int. Conf. Soil Mechanics (1963)
- Evans, C.H., "An Ezamination of Arching in Granular Soils", M.S., pp.1983
- Harris,G.W., "A Sandbox Model Used to Examine the Stress Distribution Around a Simulated Longwall Coal-Face", International Journal of Rock Mechanics, 11, pp.325~335 (1974)
- Hong.W.P, "Load Transfer By Soil Arching In Pile-Supported Embankments", SOILS AND FOUNDATIONS, 47(5), pp.833~843 (2007)
- Karol, R.H, "Chmical Grouting" (1983), Marcel Deker, Inc
- Srivastave,R.K., "Shear Behavior of Cement Grout filled Articially Created Planar Joints", Proceedings of the International Symposium on Rock Joints, pp.309~316 (1990)
- Szechy,K, "The Art of Tunneling, 21nd Edition", pp.211~243 (1973), Akademiai Kiado
- Terzaghi, K., "Stress Distribution in Dry and in Saturted Sand Above a Yield Trap-Door", First International Conference on Soil Mechanics and Foundation Engineering, pp.307~311 (1936)
- Terzaghi,K, "Theoretical Soil Mechanics", pp.66~76 (1943), John Wiley and Sons
- Riley,W.F., "Stresses at Tunnel Intersections", Journal of the Engineering Mechanics Division, 90(2), pp.167~179 (1964)