An Experimental Study on Shield TBM Tunnel Face Stability in Soft Ground

Kim, Yong‐Man; Lee, Sang-Duk; Choo, Seok-Yeon; Koh, Sung-Yil

doi:10.7782/jksr.2013.16.1.047

Cited by 2 publications

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Attwell [2], Mair et al [14], O'Relly & New [19], [20], Sang-Hwan Kim et al [22], A. Sirivachiraporn & N. Phienwej [23], J. N. Shirlaw [24], Schmidt [25], Wei-I. Chou & Antonio Bobet [29], etc.…”

Section: Introductionmentioning

confidence: 99%

The Application of Centrifuge Test to Analyse Surface Displacement in Front of Tunnel Face

Tuấn¹,

Minh²

2020

Journal of Southwest Jiaotong University

View full text Add to dashboard Cite

In this paper, the author performed two centrifuge model tests at the University of Science and Technology of Hong Kong for two cases where the tunnel was located at Cover over Diameter (C/D) of 1.5 and 3.3 to investigate the passive failure and deformation mechanism due to tunnelling in two-layer soils: sand and clay. The tests were carried out on a 1/100 scale miniature model. The experimental process simulated the progress of the tunnel face with a speed of 0.2 mm/s (equivalent to 15 m per day in practice), displaced to 40 mm and then stopped. Linear variable differential transformers are used to measure the ground transitions during the testing process. Particle image velocimetry technology measures the movement of soil in front of the tunnel face. The load cells were attached to one end of the tunnel face in order to obtain the passive pressure exerted on the tunnel face. As the tunnel face displaces, the ground in front of the tunnel face is shifted forward, while the ground that is far from the surface of the tunnel is pushed outward; the effect on the ground thus causes the ground to emerge, and so form a breakout. The partial failure mechanism in front of the tunnel face is similar to the localised cutting mechanism. When the observation failure mechanisms are idealised by continuous lines, the failure mechanism of the ground in front of the tunnel face is shaped like a funnel.

show abstract

Section: Introductionmentioning

confidence: 99%

The Application of Centrifuge Test to Analyse Surface Displacement in Front of Tunnel Face

Tuấn¹,

Minh²

2020

Journal of Southwest Jiaotong University

View full text Add to dashboard Cite

show abstract

Numerical simulation for surface settlement considering face vibration of TBM tunnelling in mixed-face condition

Kwak

Park²

2015

Journal of Korean Tunnelling and Underground Space Association

View full text Add to dashboard Cite

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.

show abstract

An Experimental Study on Shield TBM Tunnel Face Stability in Soft Ground

Cited by 2 publications

References 2 publications

The Application of Centrifuge Test to Analyse Surface Displacement in Front of Tunnel Face

The Application of Centrifuge Test to Analyse Surface Displacement in Front of Tunnel Face

Numerical simulation for surface settlement considering face vibration of TBM tunnelling in mixed-face condition

Contact Info

Product

Resources

About