Numerical investigation of the effects of tunnelling on existing tunnels

Avgerinos, V.; Potts, David M.; Standing, J. R.

doi:10.1680/jgeot.sip17.p.103

Cited by 83 publications

(24 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Mathematical Problems in Engineering By substituting (12) into (9), the two potentials in (6) can be obtained by the following equations [13]:…”

Section: Complex Variable Methods For Lined Circular Tunnelsmentioning

confidence: 99%

“…Liu et al (2017) preformed a simulation of the Gongti North Road tunnel of Beijing Metro Line 10 built by the PBA method to determine the stress state of the structure under construction [11]. Also, a series of 3D FEM analysis were performed by Avgerinos et al (2017) to discuss the lining forces and deformation of the future Crossrail tunnel [12]. Numerical method can be used to solve problems with nonlinear soil property (elastoplastic or elastoviscoplastic) and complex boundary conditions.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Complex Variable Solutions for Forces and Displacements of Circular Lined Tunnels

Han

Xia

Wang

et al. 2018

Mathematical Problems in Engineering

View full text Add to dashboard Cite

A complex variable method for solving the forces and displacements of circular lined tunnels is presented. Complex potentials for the stresses and displacements are expressed in the term of series expression. The undetermined coefficients of the complex potentials are obtained according to the stress boundary conditions along the lining inner surface and the displacement and surface traction boundary condition along the lining and rock-mass interface. Solutions for the stresses and displacements of the tunnel lining and rock-mass are then established by applying Muskhekishvili’s complex variable method. In addition, forces solutions for linings are presented based on the tangential stress at the two boundaries. Examples are finally established to reveal the applicability and accuracy of the proposed method. The effects of the degrees from the tunnel crown to the invert, coefficient of the lateral earth pressure, and distance from the rock-mass to the interface on the regulations of the lining forces and rock-mass stresses are also thoroughly investigated.

show abstract

“…Mathematical Problems in Engineering By substituting (12) into (9), the two potentials in (6) can be obtained by the following equations [13]:…”

Section: Complex Variable Methods For Lined Circular Tunnelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Complex Variable Solutions for Forces and Displacements of Circular Lined Tunnels

Han

Xia

Wang

et al. 2018

Mathematical Problems in Engineering

View full text Add to dashboard Cite

show abstract

“…After the unit is deformed, according to the displacement-strain geometric equation (11) and the physical stress-strain physical equation (12), then combined with the equilibrium differential equation, (13) can be obtained:…”

Section: Seepage Field Status Calculationmentioning

confidence: 99%

“…Liu et al [10] investigated the effects of pipe jacking on existing underlying tunnels and analyzed the vertical displacement, horizontal displacement, and diameter convergence of the tunnel based on the field observations. Avgerinos et al [11] developed a basic three-dimensional (3D) finite-element (FE) model and discussed changes in hoop forces, bending moments, and lining deformations of the exiting tunnel due to excavation of the new tunnel. Zhang et al [12] presented the deformation analyses of existing subway tunnels induced by an earth pressure balance (EPB) shield during the process of above-overlapped and downoverlapped crossing tunnels with oblique angles based on the Shanghai Railway transportation project and in situ monitoring data.…”

Section: Introductionmentioning

confidence: 99%

Influence Zone Division and Risk Assessment of Underwater Tunnel Adjacent Constructions

Zhou

Gao

Liu

et al. 2019

Mathematical Problems in Engineering

View full text Add to dashboard Cite

Compared with ordinary tunnels, the influence analysis of underwater tunnel adjacent constructions is more complicated. At present, the empirical method used to divide the influence zone of the tunnel adjacent constructions has great uncertainty. So it is of great significance for actual construction and design to determine the influence zone accurately according to theoretical calculations. In this paper, based on the Hoek–Brown nonlinear failure criterion of rock mass and taking seepage factor into account, the stress state of rock mass around the underwater tunnel adjacent constructions can be deduced by elastoplastic theory. Then combined with the concept of “loose zone-bearing zone”, the influence zone division method of underwater tunnel adjacent constructions is proposed, and it is applied to the analysis of engineering examples. Through the deduced theoretical formulas, the influence zone of underwater tunnel adjacent construction can be divided into extensively strong, strong, relatively strong, weak, and noninfluence zones. Corresponding the influence zones with the risk levels in the code, different control measures are adopted for different risk levels, which can provide certain guidance for the design and construction of tunnel in practical engineering.

show abstract

“…Wesentliche Berechnungsergebnisse zeigen sich in den Verformungsbildern bzw. Querschnittskonvergenzen, die in den Streckentunneln aufgrund des Rohrvortriebs auftreten . Sie stellen das Ausbauverhalten unter Einfluss des Rohrvortriebs grafisch dar.…”

Section: Berechnungsergebnisseunclassified

Numerische Modellierung der Überfahrung von bestehenden U‐Bahntunneln am Beispiel des Transportsiels Wallring

Umar¹,

Blaschko²,

Grubert³

2018

Geotechnik

View full text Add to dashboard Cite

Beim Projekt Transportsiel Wallring in Hamburg sind zwei U-Bahntunnel aus den Jahren 1967 bis 1969 mit einem querenden Rohrvortrieb DN 1800 zu überfahren. Dazu gilt es, die Standsicherheit der bestehenden Tunnelschalen, die mit Tübbingen aus Gusseisen ausgebaut sind, vorab rechnerisch zu überprüfen und ein geeignetes Konzept für die messtechnische Überwachung während des Rohrvortriebs zu entwickeln. Hierfür wird ein dreidimensionales FE-Modell (Finite-Elemente-Modell) aufgebaut, mit dem die Überfahrungssituation numerisch anhand der Step-bystep-Methode analysiert wird. Ebenso muss der Last-und Verformungszustand, der aus dem Bau der Bestandstunnel resultiert, berechnet und eingeprägt werden. Es kann gezeigt werden, dass der Rohrvortrieb unterschiedliche asymmetrische Belastungen sowie asymmetrische Bettungssituationen an den Bestandstunneln erzeugt, so dass die Standsicherheit der Streckentunnel nachzuweisen ist. An einem separaten FE-Schalenmodell werden zusätzlich die Traglastreserven für die asymmetrische Belastung aus dem Rohrvortrieb für die Tunnelinnenschale ermittelt. Daraus resultierend können die Grenzverformungen abgeleitet werden, die als Warn-und Alarmwerte zur Interpretation der baubegleitenden Vermessung der Streckentunnel dienen. Die Überfahrung wurde erfolgreich ohne jegliche Überschreitung der Warn-und Alarmwerte und mit guter Übereinstimmung zwischen prognostizierten und gemessenen Konvergenzen der Tunnelinnenschale abgeschlossen.Numerical modelling for crossing over two existing subway tunnels on the example of transport Siel Wallring -To the influence of a transverse pipe drive on the stability of old underground tunnels. The project Transportsiel Wallring in Hamburg contains a pipe jacking stretch DN1800, which is crossing over two metro tunnels built in the years 1967 to 1969. Therefore the structural safety of the existing tunnel linings, constructed with cast iron segments, has to be calculative verified in advance and an appropriate concept has to be developed to monitor during the pipe jacking drive. Therefore the drive-over is numerically analyzed using a three-dimensional FE model, by using the step by step method. The modelling also considers and includes loads and deformations resulting from the construction phase of the metro tunnels. It can be shown, that the pipe jacking causes different asymmetrical loads and asymmetrical bedding situations of the existing tunnels, so that the structural safety of the metro tunnels has to be confirmed. A separate shell model is used to determine the reserves in structural safety of the tunnel lining for these unsymmetrical loadings during pipe jacking, as a result, the limit deformations can be derived, which are necessary to interpret surveying results in form of warning and alarm values. The pipe jacking DN1800 overneath the existing tunnels has been finished Numerische Modellierung der Überfahrung von bestehenden U-Bahntunneln am Beispiel des Transportsiels WallringZum Einfluss eines querenden Rohrvortriebs auf die Standsicherheit alter U-Bahn...

show abstract

Numerical investigation of the effects of tunnelling on existing tunnels

Cited by 83 publications

References 10 publications

Complex Variable Solutions for Forces and Displacements of Circular Lined Tunnels

Complex Variable Solutions for Forces and Displacements of Circular Lined Tunnels

Influence Zone Division and Risk Assessment of Underwater Tunnel Adjacent Constructions

Numerische Modellierung der Überfahrung von bestehenden U‐Bahntunneln am Beispiel des Transportsiels Wallring

Contact Info

Product

Resources

About