2D numerical investigation of segmental tunnel lining under seismic loading

Anh, Ngoc; Dias, Daniel; Oreste, Pierpaolo; Djéran-Maigre, Irini

doi:10.1016/j.soildyn.2015.01.015

Cited by 61 publications

(49 citation statements)

References 18 publications

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“…HRM Method [1], [16]- [18] Method HRM is a direct method. This is part of the numerical method, method HRM used to Matlab program to construction model of tunnel lining and environment ground surrounding tunnel [16]- [17].…”

Section: B Penzien's Methods [11]-[12]mentioning

confidence: 99%

Influence of Segmental Joints in the Segmental Circular Tunnel Lining under the Impact of Earthquakes

Alexandr¹,

Nguyen²

2017

IJET

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-At present, the underground construction system is developing very strongly in the world and in Vietnam. In particular, the metro tunnel system was developed very rapidly due to its ability to serve in the urban transport system. Most tunnels in the metro system today use the segmental tunnel lining, which has segmental joints in the segmental tunnel lining due to its advantages. Tunnels these have circular cross section are very popular in metro tunnels system. In this paper, the methods of calculating the impact of earthquake on tunnels lining in the case of the tunnel has lining continuous or segmental (with segmental joints between segments of lining tunnel) have been used to comparisons of internal forces, displacement of tunnel lining in two cases under the impact of earthquake and comments about effects of segmental joints in the segmental tunnel lining. This paper is used as a case study for the Hanoi metro tunnel.Keyword -Tunnel, segmental lining, earthquake, joints, effect, earthquake. I. INTRODUCTION At present, tunnels for transportation and infrastructure are developing rapidly in the world and Viet Nam. Due to these tunnels's characteristics, tunnels may be heavily influenced by earthquakes that could impact to the area, where tunnels are located. There are many methods of calculating the impact of earthquakes to tunnels, such as methods of Wang, Pezien and Wu.... However, these methods have disadvantages such as: considering the environment the rock surrounding the tunnel and the tunnel lining are models that operate in linear elastic state, the tunnel lining is continuous.In actually design, construction of tunnels, the segmental tunnel lining could be used to tunnels, especially with tunnels under the impact of earthquakes. In the literature, effects of segmental joints on the tunnel lining are usually considered in both indirect methods and direct methods. With indirect methods are concerned, the tunnel lining is perceived as a rigid lining ring embedded on a continuous ground model, to consider the segmental lining as a continuous ring with a reduced rigidity by applying a reduction factor, η, to the bending rigidity (EI) of the tunnel lining [1]: where (EI) eq is the bending stiffness of the tunnel segmental lining, (EI) is the bending stiffness of the continuous lining (Muir Wood, Einstein và Schwartz, Takano, Oreste) [2]- [5]. The effect of joints in the tunnel lining taken into calculation through a reduced rigidity of the tunnel lining. The ground-structure interaction is usually considered by means of so-called bedded ring models, in which the ground reaction is taken into consideration by means of discrete springs according to Winkler's theory. In direct methods, segmental joints has been added directly to the tunnel lining (Lee et al, Blom, Ding et al, Naggar) [6] - [9]. In Ding et al method, has got effects of three joint stiffnesses to the tunnel lining, these be the rotational stiffness, the axial stiffness and the radial stiffness. But in this method not could calculatio...

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Section: B Penzien's Methods [11]-[12]mentioning

confidence: 99%

Influence of Segmental Joints in the Segmental Circular Tunnel Lining under the Impact of Earthquakes

Alexandr¹,

Nguyen²

2017

IJET

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“…The reason of the segmental lining has been used for a tunnel in a metro system that is the segmental lining is more resistant to the effects of earthquakes due to its deformability than the lining continuous. Use to equivalent method, is consider the segmental lining of the tunnel as the continuous lining but under the influence of the joints in the lining, the rigidity of the segmental lining has been reduced significantly compared to the corresponding the tunnel lining continuously with a reduced rigidity by applying a reduction factor [3,6]:…”

Section: Influence Of Segmental Jointsmentioning

confidence: 99%

“…Indirect methods-the tunnel segmental lining as be an equivalent the tunnel lining continuously. These methods of calculating in this group can be taken to be methods [3]: method of Wood (1975), method of Liu and Hou (1991), method of Lee and Ge (2001) Direct method groups include Takano (2000), Lee et al (2002), Bloom (2002), Naggar and Hinchberger [2008]). Indirect methods have the advantage of being simple, easy to calculate, giving fast results, but there are disadvantages such as: do not accurately reflect the effect of joints in the tunnel lining, don't update change for parameters of joints in the lining as the position of joints, the rotation stiffness of joints...…”

Section: Introductionmentioning

confidence: 99%

Behavior of Segmental Tunnel Linings Under the Impact of Earthquakes: A Case Study From the Tunnel of Hanoi Metro System

Alexandr¹

2018

GEOMATE

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ABSTRACT:The current metro systems have become an important part of the public transport system in major cities around the world. With the development of construction technology as well as technical requirements, the segmental tunnel lining has become the main lining used protective for tunnels. The main effect of segmental tunnel lining when it is used for tunnels that is ability strengthened stability of tunnels under the impact of earthquakes. This paper presents methods for calculating to effects of earthquakes on tunnels lining in two cases: tunnel continuous lining and segmental tunnel lining by identifying internal forces present on tunnels lining and the deformation of tunnels lining. Based on results obtained, analysis the effect of the joints for segmental tunnel lining under seismic loads and the effect of the rotation stiffness of joints to the segmental tunnel lining when have got the impact of earthquakes to the tunnel. This paper used parameters of the tunnel in Hanoi metro system as a case study.

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“…Key segment was introduced to complete the whole ring. A series of three staggered ring model are used herein (follow [13]). Three successive staggered rings at angle of 11.25 o rotated clockwise were developed followed by all-at-once tunnel model (3S+AAO) with the length of 22.4m in longitudinal axis (excavation length in y-direction).…”

Section: Model Developmentmentioning

confidence: 99%

3D Numerical Model of Soil-Tunnel Interaction Induced by Segment Joint Parameter

Jusoh

Mohamad

Marto

et al. 2018

J. Phys.: Conf. Ser.

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Abstract. In a shallow tunnel, tunnel construction will triggers a chain of ground movements, resulting in settlements at the ground surface, which become more significant with the decrease in tunnel depth. Therefore, by considering behaviour of the segment tunnel joints (can affect the integrity of tunnel in both circumference and longitudinal directions), the surface settlement trough were investigated. Initial model of dual segmental tunnel lining was model and validated with laboratory test to gain nonlinear response of segment joint. Then, a soil-tunnel simulation model was developed with various segment joint parametric models for Singapore Circle Line Stage 3 (C852) project. Results showed that with the use of flexible segment joints that allow movement (hinge-nonlinear model) in staggered ring tunnel model, the ground deformation depicted higher resemblance of surface settlement pattern to the field data. Steady state settlement was observed after 10m of cutter head distance.

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2D numerical investigation of segmental tunnel lining under seismic loading

Cited by 61 publications

References 18 publications

Influence of Segmental Joints in the Segmental Circular Tunnel Lining under the Impact of Earthquakes

Influence of Segmental Joints in the Segmental Circular Tunnel Lining under the Impact of Earthquakes

Behavior of Segmental Tunnel Linings Under the Impact of Earthquakes: A Case Study From the Tunnel of Hanoi Metro System

3D Numerical Model of Soil-Tunnel Interaction Induced by Segment Joint Parameter

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