Analysis of the Interaction between the Lining of a TBM Tunnel and the Ground Using the Convergence-Confinement Method

Oreste, Pierpaolo

doi:10.3844/ajassp.2015.276.283

Cited by 14 publications

(9 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By inserting in a graph the linear trends observed by the ratio u R0 /R (given by numerical modelling by varying p 0 ) and the values u R0 /R, obtained with an iterative procedure using the equations of Vlachoupulos and Diederichs (Oreste, 2015), it is possible to observe differences for estimating u R0 (see Fig. 5).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Estimation of Shaft Radial Displacement beyond the Excavation Bottom before Installation of Permanent Lining in Nondilatant Weak Rocks with a Novel Formulation

Spagnoli¹,

Oreste

Bianco

2017

Int. J. Geomech.

Self Cite

View full text Add to dashboard Cite

The Convergence-Confinement Method (CCM) applies to circular tunnels in an in situ stress field in which all three principal stresses are equal and where the rock mass exhibits elastoperfectly plastic shear failure. As the radial wall displacement cannot be easily obtained by using analytical methods, an extensive parametric analysis of the bi-dimensional numerical modelling in order to investigate the strain of the shaft wall close to the excavation bottom was performed. 81 cases were derived from the combination of the geometrical parameters and three weak rock categories. By processing the data relating to u R0 (radial displacement of the shaft wall at the excavation bottom) values obtained by numerical calculation in the different cases studied, it was possible to calculate the u R0 /R ratio as a function of the lithostatic stress p 0 , the lining thickness s, and the shaft radius R. Novel equations were obtained for quickly estimating the value of u R0 knowing the lining concrete thickness, the shaft depth and the shaft radius, for the different qualities of rock considered.

show abstract

Section: Resultsmentioning

confidence: 99%

“…6.3644, 11.312. 11.377 equation and an iterative procedure for obtaining u R0 (Oreste, 2015) (CCM) and using eq.1 obtained from the developed parametric study with the numerical modelling, for rocks with poor (A), medium (B) and good (C) mechanical properties.…”

Section: Figure Captionmentioning

confidence: 99%

Estimation of Shaft Radial Displacement beyond the Excavation Bottom before Installation of Permanent Lining in Nondilatant Weak Rocks with a Novel Formulation

Spagnoli¹,

Oreste

Bianco

2017

Int. J. Geomech.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Furthermore, following Oreste [2,7,63], Figure 13 presents the results obtained by the CCM for tunnels with a combined support system. In Figure 13, the final support forces that act on the tunnel wall reach a value of around 1.30 MPa for case (1), and around 0.62 MPa for case (2).…”

Section: Design For Tunnels With Two Support Systemsmentioning

confidence: 99%

“…On the other hand, Oreste [2] proposed support characteristic curves for a combined support system, which extended the CCM in the application of tunnels with several different supports [2,7,9,63].…”

Section: Introductionmentioning

confidence: 99%

Numerical solutions for tunnels excavated in strain-softening rock masses considering a combined support system

Song

Rodríguez-Dono

2021

Applied Mathematical Modelling

View full text Add to dashboard Cite

“…This method calculates the load applied to the support system, installed behind the tunnel face, and provides insight in relation to the interaction between tunnel lining and the surrounding ground [11][12][13][14][15]. The convergence-confinement method has been used in several researches; investigating active grouted rock-bolts in tunnel stability [16], design of active grouted rock-bolts in tunnel stability [17] and analysis of the interaction between the lining of a tunnel boring machine (TBM) tunnel and the ground [18].…”

Section: Introductionmentioning

confidence: 99%

A Gene Expression Programming Model for Predicting Tunnel Convergence

et al. 2019

View full text Add to dashboard Cite

Underground spaces have become increasingly important in recent decades in metropolises. In this regard, the demand for the use of underground spaces and, consequently, the excavation of these spaces has increased significantly. Excavation of an underground space is accompanied by risks and many uncertainties. Tunnel convergence, as the tendency for reduction of the excavated area due to change in the initial stresses, is frequently observed, in order to monitor the safety of construction and to evaluate the design and performance of the tunnel. This paper presents a model/equation obtained by a gene expression programming (GEP) algorithm, aiming to predict convergence of tunnels excavated in accordance to the New Austrian Tunneling Method (NATM). To obtain this goal, a database was prepared based on experimental datasets, consisting of six input and one output parameter. Namely, tunnel depth, cohesion, frictional angle, unit weight, Poisson’s ratio, and elasticity modulus were considered as model inputs, while the cumulative convergence was utilized as the model’s output. Configurations of the GEP model were determined through the trial-error technique and finally an optimum model is developed and presented. In addition, an equation has been extracted from the proposed GEP model. The comparison of the GEP-derived results with the experimental findings, which are in very good agreement, demonstrates the ability of GEP modeling to estimate the tunnel convergence in a reliable, robust, and practical manner.

show abstract

Analysis of the Interaction between the Lining of a TBM Tunnel and the Ground Using the Convergence-Confinement Method

Cited by 14 publications

References 8 publications

Estimation of Shaft Radial Displacement beyond the Excavation Bottom before Installation of Permanent Lining in Nondilatant Weak Rocks with a Novel Formulation

Estimation of Shaft Radial Displacement beyond the Excavation Bottom before Installation of Permanent Lining in Nondilatant Weak Rocks with a Novel Formulation

Numerical solutions for tunnels excavated in strain-softening rock masses considering a combined support system

A Gene Expression Programming Model for Predicting Tunnel Convergence

Contact Info

Product

Resources

About