Segment design under consideration of the material used to fill the annular gap / Tübbingbemessung unter Berücksichtigung der Eigenschaften des Ringspaltmaterials

Thienert, Christian; Pulsfort, Matthias

doi:10.1002/geot.201100050

Cited by 20 publications

(2 citation statements)

References 3 publications

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“…The first is the single-stiffness linear model, and it is the simplest connection model, which is applied extensively in the semi-rigid joint analysis methods, especially in analytical methods [9,10]. The second is the bilinear models, which has been proposed in the numerical analyses of tunnels to provide a better approximation [22,[26][27][28]. However, if the continuous reduction in rotational stiffness, due to the nonlinear behaviour of the longitudinal joints, is not considered, both the singlestiffness linear model and bilinear model may result in a high bending stiffness of the overall tunnel lining system, and this can cause larger bending moments along the lining.…”

Section: Behaviour Of the Semi-rigid Joint Connectionmentioning

confidence: 99%

A new numerical approach to the hyperstatic reaction method for segmental tunnel linings

Anh

Dias

Oreste

et al. 2014

Num Anal Meth Geomechanics

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SUMMARYThis paper proposes a numerical approach to the hyperstatic reaction method (HRM) for the analysis of segmental tunnel linings. The influence of segmental joints has been considered directly using a fixity ratio that is determined on the basis of the rotational stiffness. The parameters necessary for the calculation are presented. A specific implementation has been developed using a FEM framework. This code is able to consider the three-dimensional (3D) effect of segment joints in successive rings on the tunnel lining behaviour. The present HRM allows one to take an arbitrary distribution of segment joints along the tunnel boundary into consideration. In addition, the rotational stiffness of segment joints has been simulated using nonlinear behaviour, as it is closer to the true behaviour of a joint than linear or bilinear behaviour.The numerical results of three hypotheses on ring interaction, which allow the 3D effect of a segmental tunnel lining to be taken into account, have been compared with data obtained from the shield-driven tunnel of the Bologna-Florence high-speed railway line project. The numerical results presented in the paper show that the proposed HRM can be used to effectively estimate the behaviour of a segmental tunnel lining.

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Section: Behaviour Of the Semi-rigid Joint Connectionmentioning

confidence: 99%

A new numerical approach to the hyperstatic reaction method for segmental tunnel linings

Anh

Dias

Oreste

et al. 2014

Num Anal Meth Geomechanics

View full text Add to dashboard Cite

show abstract

“…The ground is modeled by continuum elements or ground springs in the numerical analysis. The first ground model uses soil continuum elements and ground-lining interface elements to represent the surrounding ground and the ground-lining interaction, respectively [9][10][11][12][13][14]. This model can analyze both lining and ground behavior, and offer the ability to model sophisticated properties of ground and lining structure, construction process, and complex scenarios; that is, material non-linearity, different geological strata, gap-filling process, and effects on adjacent structures.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Tangential Ground–Lining Interaction on Segmental Lining Behavior Using the Beam-Spring Model

Pham

Sugimoto

2020

Applied Sciences

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The shield tunneling method is widely used, especially in urban areas, since it is efficient for minimizing disturbances to surroundings. Although segmental lining is commonly used in this method, in both the research and practice of tunnel lining design, the interaction between the ground and lining in the tangential direction remains unclear; that is, the mobilizing shear stress due to load models and the degree of the bond in the tangential direction. Therefore, to clarify the effects and mechanism of the tangential ground–lining interaction on segmental lining behavior, a parameter study was carried out, taking tangential spring stiffness, load models, soil stiffness, and shallow and deep tunnels as parameters. The interaction conditions were based on the existing literature. It was found that (1) the tangential spring has small effects on lining behavior, (2) the load model significantly affects the sectional forces, (3) the initial tangential earth pressure and slip ground–lining boundary provide more safety from a design viewpoint, and (4) in the case of shallow tunnels in soft ground, tensile stress appears in the lining. Therefore, it is important to take the tangential ground–lining interaction conditions into consideration during tunnel lining analysis.

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Soil‐structure interaction in tunnel lining analyses

2015

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There are various methods for the analysis of the interactional behavior of the surrounding land, using the lining structure which is the most common method of deigning lining structure tools for the static loads by using the hyper static methods. In recent years, there has been a question that depicts whether this method provides the best results in designing the tunnel structure or not. Due to the nonlinear behavior of the earth surrounding the lining structure, utilizing the lining method could lead to conservative results in the design. If it is possible to somehow find the forces caused by the real behavior of the land surrounding the lining structure influencing the structure and conduct the design based on them, more optimal results would be obtained. This study is based on the actual behavior of the land surrounding the lining structure and the displacement of the structure caused by forces with linear behavior in the static design according to the non-linear behavior of the land around the tunnel structure. The behavior is modeled using the non-linear programs and the forces affecting the lining of the structure will be inference. Also there is a case study based on this method in which the soil interaction with the tunnel analysis and designing the lining structure was first performed and eventually the obtained results were compared with the hyper static method. In this paper, analysis of maintenance system with lower thicknesses considering land-shield, indicated that applying the reinforced concrete with 40cm thickness has the potential to tolerate the applied load but lining with 45cm thickness is capable of tolerating the loads of design and it can be concluded that applying the simulation method combined with the soil and structure besides considering the nonlinear behavior of the soil leads to more economical results in a project.

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Segment design under consideration of the material used to fill the annular gap / Tübbingbemessung unter Berücksichtigung der Eigenschaften des Ringspaltmaterials

Cited by 20 publications

References 3 publications

A new numerical approach to the hyperstatic reaction method for segmental tunnel linings

A new numerical approach to the hyperstatic reaction method for segmental tunnel linings

The Effects of Tangential Ground–Lining Interaction on Segmental Lining Behavior Using the Beam-Spring Model

Soil‐structure interaction in tunnel lining analyses

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