Effect of TBM Advance in the Structural Response of Segmental Tunnel Lining

Mendoza-Galván, A.; Peña, Fernando; Moreno-Martínez, Jatziri Y.

doi:10.1061/(asce)gm.1943-5622.0000941

Cited by 33 publications

(7 citation statements)

References 13 publications

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“…They were followed by tests on strengthened single rings with the help of steel shells [53], filament wound profiles [54], steel-concrete composites [55], and Ultra-High Performance Concrete (UHPC) [56]. In case of insignificant ring-to-ring interaction, it is reasonable to restrict the experimental investigations to tests of single rings [57]. However, for some loading scenarios, such as large axial loading [58], this interaction may become strong.…”

Section: Experimental Datamentioning

confidence: 99%

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On the added value of multi-scale modeling of concrete

Zhang

Binder

Wang

et al. 2022

Front. Struct. Civ. Eng.

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This review of the added value of multi-scale modeling of concrete is based on three representative examples. The first one is concerned with the analysis of experimental data, taken from four high-dynamic tests. The structural nature of the high-dynamic strength increase can be explained by using a multi-scale model. It accounts for the microstructure of the specimens. The second example refers to multi-scale thermoelastic analysis of concrete pavements, subjected to solar heating. A sensitivity analysis with respect to the internal relative humidity (RH) of concrete has underlined the great importance of the RH for an assessment of the risk of microcracking of concrete. The third example deals with multi-scale structural analysis of a real-scale test of a segmental tunnel ring. It has turned out that multi-scale modeling of concrete enables more reliable predictions of crack opening displacements in tunnel segments than macroscopic models taken from codes of practice. Overall, it is concluded that multi-scale models have indeed a significant added value. However, its degree varies with these examples. In any case, it can be assessed by means of a comparison of the results from three sources, namely, multi-scale structural analysis, conventional structural analysis, and experiments.

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Section: Experimental Datamentioning

confidence: 99%

“…[73], the ones for the ground pressure in Ref. [57], and those for the overload on the ground surface in Ref. [74].…”

Section: Structural Analysismentioning

confidence: 99%

On the added value of multi-scale modeling of concrete

Zhang

Binder

Wang

et al. 2022

Front. Struct. Civ. Eng.

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“…( 7) Define assembly rules. As some researchers suggested, some relative rotation angles between two neighboring rings would form continuous joints and result in moment rotation and load-deformation behavior between rings [16]. In addition, considering the waterproof quality and TBM installation mechanism, the assembly of section K in certain positions should be avoided.…”

Section: Assembly Simulation Program Developmentmentioning

confidence: 99%

Study on the Universal Tapered Segmental Ring Assembly Simulation Algorithm and Deviation Assessment: A Case Study on Metro Line Tunnel

Zheng

Karlovšek

2021

Advances in Civil Engineering

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Universal tapered segmental ring system has been adopted to assemble tangent and curve line elements into the shield tunnels through the relative rotation of the adjacent front and rear rings, which simplifies the formwork design, demonstrates strong universality, and is easy for quality assurance. To evaluate the position deviation caused by the taper value and propose the assembly scheme for the contractor, this article developed the universal tapered segmental ring assembly simulation technology. Firstly, the assembly procedure of the universal tapered segmental ring system both in normal case and in special case is introduced, including the interval tunnel of special rings and actual engineering that needs deviation correction. Secondly, relevant core algorithms are introduced in detail, including the coordinate position algorithm of horizontal and vertical curves and computer graphic algorithm of spatial point rotating around any axis. Finally, this article takes a background metro line tunnel as a case to validate the algorithm and illustrate the assessment methodology of universal tapered segmental ring assembly accuracy. The sections with maximum deviation are found as an alert ahead of the shield advancing. In conclusion, the algorithms and methodology proposed in this article illustrate the excellent suitability and robustness in shield tunnels adopting a universal tapered segmental ring system in the stage of both design and construction.

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“…The total jack thrust force during the construction of a quasi-rectangular shield tunnel is about 100,000 kN according to the construction data. The longitudinal force in shield tunnels in soft soils is approximately 10-20% of the total thrust of the tunnel boring machine [30,47]. Hereafter, the mean value, i.e., 15%, is adopted.…”

Section: Effect Of the Circumferential Shear Stiffnessmentioning

confidence: 99%

Influence of Rotational Stiffness Modeling on the Joint Behavior of Quasi-Rectangular Shield Tunnel Linings

et al. 2020

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A beam-spring model with constant rotational stiffness is a practical tool for the prediction of the general deformations and bending moments in circular tunnel linings. However, in reality, the rotational stiffness of a segmental joint is not constant, due to nonlinear deformations and local yielding in the vicinity of the joint. These are a result of the specific geometry at the joint, which is related to water-tightness measures and buildability issues. For quasi-rectangular tunnels this nonlinearity should not be neglected, as the bending component in the lining is significantly larger compared to circular linings. To date, there are only few studies that have investigated a calculation method for consideration of the joint’s nonlinear moment-axial force and shear-axial force interaction behavior and its consequences on the calculated lining behavior. In this paper, an iterative incremental method is proposed to tackle this issue, based on rotational stiffness curves derived from 3D nonlinear finite element modelling of the joints, and substantiated by testing. The significance of the variable rotational stiffness is highlighted through a comparison with results based on a constant stiffness assumption. Further, using the proposed calculation method, the effects of the circumferential joints, the bending moment transmission and several other parameters on the full-ring behavior of quasi-rectangular tunnels are discussed for a wide interval of design parameters. The results provide some new insights into the behavior of this non-traditional tunnel type. Although the presented results are related to specific overall and local geometries, the presented method is considered to be useful for the design of other special tunnel geometries.

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Effect of TBM Advance in the Structural Response of Segmental Tunnel Lining

Cited by 33 publications

References 13 publications

On the added value of multi-scale modeling of concrete

On the added value of multi-scale modeling of concrete

Study on the Universal Tapered Segmental Ring Assembly Simulation Algorithm and Deviation Assessment: A Case Study on Metro Line Tunnel

Influence of Rotational Stiffness Modeling on the Joint Behavior of Quasi-Rectangular Shield Tunnel Linings

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