Shield Tunnel Construction in Centrifuge

Nomoto, Toshi; Imamura, Shinichiro; Hagiwara, Toshiyuki; Kusakabe, Osamu; Fujii, Nobutada

doi:10.1061/(asce)1090-0241(1999)125:4(289)

Cited by 97 publications

(19 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Park et al, 1999), preinstalled tubes with vinyl facing (e.g. Chambon and Corte, 1994), mechanically adjustable linings (Lee and Yoo, 2006) and miniature tunnel boring machines (Nomoto et al, 1999). These methods are described in more details elsewhere (Meguid et al, 2008).…”

Section: Methodsmentioning

confidence: 99%

An experimental study of the effect of local contact loss on the earth pressure distribution on existing tunnel linings

Leung

Meguid

2011

Tunnelling and Underground Space Technology

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 99%

An experimental study of the effect of local contact loss on the earth pressure distribution on existing tunnel linings

Leung

Meguid

2011

Tunnelling and Underground Space Technology

View full text Add to dashboard Cite

“…In the tunnel construction process, additives are often injected into the working chamber to improve the characteristics of the excavated soil so that it is plasticized and easy to convey [8] . Therefore, we can assume that the soil in the chamber is plastic.…”

Section: Theoretical Modelmentioning

confidence: 99%

Earth pressure balance control for EPB shield

Yang

Shi

Gong

et al. 2009

Sci. China Ser. E-Technol. Sci.

View full text Add to dashboard Cite

This paper mainly deals with the critical technology of earth pressure balance (EPB) control in shield tunneling. On the assumption that the conditioned soil in the working chamber of the shield is plasticized, a theoretical principle for EPB control is proposed. Dynamic equilibrium of intake volume and discharge volume generated by thrust and discharge is modeled theoretically to simulate the earth pressure variation during excavating. The thrust system and the screw conveyor system for earth pressure control are developed based on the electro-hydraulic technique. The control models of the thrust speed regulation of the cylinders and the rotating speed adjustment of the screw conveyor are also presented. Simulation for earth pressure control is conducted with software AMESim and MATLAB/Simulink to verify the models. Experiments are carried out with intake control in clay soil and discharge control in sandy gravel section, respectively. The experimental results show that the earth pressure variations in the working chamber can be kept at the expected value with a practically acceptable precision by means of real-time tuning the thrust speed or the revolving speed of discharge system. earth pressure balance (EPB), shield, thrust system, screw conveyor, hydraulic system

show abstract

“…To simplify the problem, experimental investigations have been carried out focusing on some of factors, i.e. tail void, buried depth, screw conveyors, dynamic loading, etc., through physical modeling [2][3][4][5][6][7]. However, limited investigations have been made to address the influence of soil conditioning on the ground deformation during longitudinal tunneling.…”

Section: Introductionmentioning

confidence: 99%

Influence of soil conditioning on ground deformation during longitudinal tunneling

Jiang

Yin

2014

Comptes Rendus. Mécanique

View full text Add to dashboard Cite

Soil conditioning is often adopted to facilitate EPB shield tunneling. However, the resulting improvement of soil fluidity and the reduction of friction forces will also raise the ground deformation problem. This paper aims to investigate the influence of soil conditioning on the ground deformation during longitudinal tunneling. DEM is employed for this study due to its advantages in analyzing large deformations and discontinuous processes. Soil conditioning is modeled by reducing the interparticle friction of soils in a specific zone around the cutterhead of the tunnel. The tunnel advance with different soil-conditioning treatments is thus modeled. Comparisons are carried out on the ground deformation, i.e. ground surface settlement, vertical and horizontal displacements. The influence of soil conditioning on the ground deformation is clarified, and is associated with the fluidity from poor to favorite, and the mechanical properties from dilative to contractive are associated with the increase of soil conditioning. The results are helpful to determine the conditioned soils and control ground deformation for real constructions.

show abstract

Shield Tunnel Construction in Centrifuge

Cited by 97 publications

References 8 publications

An experimental study of the effect of local contact loss on the earth pressure distribution on existing tunnel linings

An experimental study of the effect of local contact loss on the earth pressure distribution on existing tunnel linings

Earth pressure balance control for EPB shield

Influence of soil conditioning on ground deformation during longitudinal tunneling

Contact Info

Product

Resources

About