Prediction of tunnel lining forces and deformations using analytical and numerical solutions

Zhao, Chenyang; Lavasan, Arash Alimardani; Thomas, Benedict; Kämper, Christoph; Mark, Peter; Schanz, Tom

doi:10.1016/j.tust.2017.01.015

Cited by 69 publications

(24 citation statements)

References 19 publications

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“…33,34 Shotcrete and U-shaped shed support components were modeled by structural elements obeying linear elastic constitutive behavior based on the recommendations from the previous literature.…”

Section: Numerical Modelingmentioning

confidence: 99%

Experimental and numerical investigation on a novel support system for controlling roadway deformation in underground coal mines

Sun

Zhang

et al. 2019

Energy Science & Engineering

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Roadway stability in extremely soft coal mass is a typical challenge in deep underground mines, as the most widely adopted support structure such as rock bolting, compound support system normally fails. This paper proposed a novel prereinforcement method for coal roadway, that is, jet grouting (JG) technique, to improve the quality of surrounding soft coal mass and form a stable support structure namely jet grouted coalcrete. The field and laboratory tests were conducted for evaluating the applicability of JG and the mechanical parameters of coalcrete. A numerical model was verified by comparing the calculated results with field measurements. According to the confirmed model, three typical JG support schemes were performed to assess the roadway stability after JG. The results showed that the proposed JG schemes can reduce the deformation and failure zone of the roadway and optimize the stress states around the roadway. The mechanism related to these advantages was investigated.This study provides a promising idea for supporting soft coal roadway in deep underground coal mines, which can promote the JG application in the field. K E Y W O R D Scoalcrete, jet grouting technique, numerical modeling, roadway stability, soft coal mass

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Section: Numerical Modelingmentioning

confidence: 99%

Experimental and numerical investigation on a novel support system for controlling roadway deformation in underground coal mines

Sun

Zhang

et al. 2019

Energy Science & Engineering

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“…[3][4][5][6][7] Among these approaches, the finite element method (FEM) is the most preferable tool and has been used widely in practical engineering. Although the FEM offers advantages in the analysis, such as the consideration of three-dimensional effect and simulations of staged construction process, it could still be unfavorable under certain circumstances, eg, in the initial design stage, 8 owing to the unbearable computational cost. Meanwhile, some analytical models that employ simplified assumptions are more popular and thus have been adopted widely.…”

Section: Introductionmentioning

confidence: 99%

“…Another challenging task for the structure analysis of the lining is the interaction between the tunnel and surrounding soils. With respect to the different assumptions simulating the interaction, Zhao et al 8 categorized the present models into two groups: continuum models 9,17,18 and bedded-beam models. 13,14,16,[19][20][21] The former group assumes a full or no-bonding condition of the interface between the liners and the surrounding soils, and the equivalent uniform distributions of both the vertical and horizontal earth pressures are assumed in the analysis, which is considered to be more suitable for deeply buried tunnels.…”

Section: Introductionmentioning

confidence: 99%

Analytical approach for circular‐jointed shield tunnel lining based on the state space method

Wang

Huang

et al. 2020

Num Anal Meth Geomechanics

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Summary This paper presents a new analytical solution to the circular segmental tunnel lining subjected to overburden and surrounding earth pressures. The governing equations are derived by adopting the curved Euler beam theory and the principle of minimum potential energy. Based on the state space method, the displacements and the relevant energy‐conjugated internal forces are treated as the fundamental unknown state vector and can be obtained by solving the state function. The inter‐segment joints on the lining are modeled by a set of linear springs, including shear, compression, and rotation. The presented method allows for the arbitrary distribution of the segmented joints and loads along the circumferential direction. The most striking advantages of the proposed method include the rigid body displacement treatment, lining‐displacement‐dependent soil reaction, and internal force direction dependency of the joint stiffness. Using this method, the displacements and internal forces of the entire lining can be obtained conveniently and simultaneously under the arbitrary loading and joint distribution conditions. The verification of the analytical solutions is provided by several examples.

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“…Bei Teilflächenbelastungen werden Druckkräfte über einen örtlich begrenzten Teil der zur Verfügung stehenden Querschnittsfläche in das Betonbauteil eingeleitet. Diese Belastungssituation tritt beispielsweise bei der Verankerung von Spanngliedern, bei punkt‐ oder linienförmigen Auflagerkonstruktionen von Brückenüberbauten oder bei Tübbingsegmenten infolge der konzentrierten Lasteinleitung durch die Vorschubpressen der Tunnelbohrmaschine auf .…”

Section: Introductionunclassified

Aufnehmbare Teilflächenspannung von hochfestem Stahlfaserbeton

Plückelmann

Breitenbücher

Smarslik

et al. 2019

Beton und Stahlbetonbau

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Bei Teilflächenbelastungen werden Druckkräfte teilflächig in Betonbauteile eingeleitet. Für unbewehrte und konventionell mit Betonstahl bewehrte Betone existieren diesbezüglich bereits zahlreiche Untersuchungen, die das Tragverhalten unter Teilflächenbelastung beschreiben. Durch die Tendenz zu höheren Betonfestigkeiten und dem zunehmend weit verbreiteten Einsatz von Stahlfasern in den letzten Jahren wird es notwendig, auch das Verhalten von hochfestem Stahlfaserbeton unter Teilflächenbelastung zu eruieren. Der Beitrag beschreibt Versuche an hochfestem Stahlfaserbeton unter Teilflächenbelastung mit räumlicher und ebener Lastausbreitung. Dabei wurden unterschiedliche Flächenverhältnisse und Betone mit verschiedenen Fasertypen und ‐gehalten sowie Fasercocktails einbezogen. Auf Grundlage der Versuchsergebnisse wird ein Berechnungsansatz für die maximal aufnehmbare Teilflächenspannung vorgeschlagen. Es wird gezeigt, dass durch den Bezug auf die Biegezugfestigkeit, anstatt wie bei bekannten Berechnungsansätzen auf die Druckfestigkeit, eine deutlich genauere Berechnung der maximal aufnehmbaren Teilflächenspannung von hochfestem Stahlfaserbeton möglich ist.

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Prediction of tunnel lining forces and deformations using analytical and numerical solutions

Cited by 69 publications

References 19 publications

Experimental and numerical investigation on a novel support system for controlling roadway deformation in underground coal mines

Experimental and numerical investigation on a novel support system for controlling roadway deformation in underground coal mines

Analytical approach for circular‐jointed shield tunnel lining based on the state space method

Aufnehmbare Teilflächenspannung von hochfestem Stahlfaserbeton

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