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(사)한국터널지하공간학회

ISSN : 2233-8292

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Vol.17 No.3
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Numerical simulation for surface settlement considering face vibration of TBM tunnelling in mixed-face condition

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2015, v.17 no.3, pp.333-339


& (2015). Numerical simulation for surface settlement considering face vibration of TBM tunnelling in mixed-face condition. (사)한국터널지하공간학회, 17(3), 333-339.
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Abstract

In this paper, the surface settlement resulted from the shallow TBM tunnelling has been numerically simulated. TBM tunnelling is especially used in urban area to avoid serious vibration and noise caused by explosion in NATM. Surface settlement is one of the most important problems encountered in all tunnelling and critical in urban areas. In this study, face vibration of TBM excavation is considered to estimate surface settlement trend according to TBM extrusion. The dynamic excavation forces are calculated by total torque on the TBM cutterhead in mixed-face of soil and weathered rock condition with shallow depth. A 3-dimensional FDM code is employed to simulate TBM tunnelling and mechanical-dynamic coupling analysis is performed. The 3D numerical analysis results showed that dynamic settlement histories and trend of surface settlement successfully. The maximum settlement occurred at the excavation point located at 2.5D behind the face, and the effect of face vibration on the surface settlement was verified in this study.

keywords
지표침하, TBM, 막장면 진동, 복합지반, 역학-동역학 연계해석, Surface settlement, TBM, Face vibration, Mixed-face, Mechanical-dynamic coupling analysis

Reference

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