Assessment the influence of ground stratification, tunnel and surface buildings specifications on shield tunnel lining loads (by FEM)

Katebi, Hooshang; Rezaei, Amir; Hajialilue-Bonab, Masoud; Tarifard, Abolfazl

doi:10.1016/j.tust.2015.04.004

Cited by 75 publications

(33 citation statements)

References 12 publications

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“…Only a few works considered the effect on the structural forces in lining. The 2D and 3D FEM are used to study the structural forces during tunnel excavation or even additional forces in tunnel lining affected by ground stratification, surface buildings and tunnel depth [5]. The numerical and finite element analyses have also been utilized in design of tunnel lining [6][7][8].…”

Section: Fig 1 New Construction Adjacent To Existing Tunnel In Urbanmentioning

confidence: 99%

“…Based on previous studies on impact of adjacent loaded pile on existing tunnel [5,7], the tunnel deformation is generally considered in term of the changed tunnel diameter on the tunnel axis in vertical (tunnel crown and Invert) and horizontal (tunnel spring line) directions. Therefore, the bending moment and axial force are investigated from the corresponding positions as shown in Fig 5. The calculation of the change of bending moment and axial force are shown in Eq.…”

Section: Structural Forcesmentioning

confidence: 99%

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Investigation on Tunnel Responses Due to Adjacent Loaded Pile by 3d Finite Element Analysis

Heama¹,

Jongpradist²,

Lueprasert³

et al. 2017

GEOMATE

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Underground structures are popularly utilized in urban development, especially tunnels for both transportation and utilities. The interaction problem between existing tunnel and piles from new constructed structures thus becomes unavoidable in dense population area. The tunnel loses its stability if the additional forces and changed diameters (due to adjacent piles under loading) of tunnel lining are drastically high. This depends on many factors, such as the clearance and pile tip level with respect to tunnel position. For preliminary assessment during the first stage of design, it is necessary to estimate this impact. The concept of tunnel protection zone is commonly adopted. However, to establish the tunnel protection zone for adjacent loaded pile, the understanding on this interaction problem is essential. This study analyzes the effect of adjacent pile under loading on the existing tunnel by 3D finite element method. The case study is the tunnel of MRTA project subjected to an adjacent 1 m bored pile under loading with various lengths and clearances. The additional forces ( bending moment and axial force) and the tunnel deformations are investigated. The results show that the additional forces and the tunnel deformations decrease when the clearance increase and become insignificantly increasing when the clearance is larger than 3.5 m. The distribution patterns of additional forces and tunnel deformation are similar.

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Section: Fig 1 New Construction Adjacent To Existing Tunnel In Urbanmentioning

confidence: 99%

Section: Structural Forcesmentioning

confidence: 99%

Investigation on Tunnel Responses Due to Adjacent Loaded Pile by 3d Finite Element Analysis

Heama¹,

Jongpradist²,

Lueprasert³

et al. 2017

GEOMATE

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“…At present, research on the influence of ground-heaped load on shield tunnels mainly focuses on theoretical calculation [18], [19], [20], numerical analysis [21], [22], [23], [24], model testing [25], [26], and field measurement [27], [28].…”

Section: State Of the Artmentioning

confidence: 99%

Analysis of Forces and Deformation Rule of Existing Shield Tunnel Caused by Ground-heaped Load

Wei¹,

Jin²,

Cui³

et al. 2017

JESTR

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Ground-heaped load often leads to complex stresses on existing shield tunnels, which can cause deleterious effects, such as cracking and uneven deformation. The mechanical behavior of shield tunnels caused by ground-heaped load was analyzed to examine the influence of ground load on the force and deformation of shield tunnels and reduce and prevent harm to shield tunnels caused by ground load. The mechanism of ground-heaped load that affect shield tunnels was also explored. The internal forces of lining were calculated with and without ground-heaped load and the results of forces were compared using the modified routine method of lining design theory. Finally, the deformation laws of tunnel were examined based on different magnitudes and locations of ground-heaped load by employing 3D software MIDAS/GTS NS. Results show that ground load can lead to the settlement of the tunnel, wherein the maximum settlement increases linearly with increasing ground load. The settlement of tunnels decreases as the distance between the stacking center and the tunnel center increases, whereas horizontal displacement increases before decreasing. The bending moment, axial force, and shear force increased by 69.34%, 51.90%, and 67.11%, respectively, compared with those measured without ground-heaped load. The conclusions obtained in this study have an important guiding significance for predicting and controlling the force and deformation of shield tunnel caused by ground-heaped load in practical engineering.

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“…Nowadays, analysis of shield tunneling can be achieved by mean of three-dimensional (3D) model [5], [6]. These analyses take into account the steps of tunnel construction, but the tunnel lining is commonly modeled by means of continuous ring.…”

Section: Introductionmentioning

confidence: 99%

“…Although, it is commonly realized that the effect of the tunnel construction loads on the tunnel lining must be taken into account in the analysis and design of shield tunnels, only few research has been carried out to grasp the effect of tunnel construction loads [5], [6]- [8]. This paper presents a threedimensional analysis model to enhance the appreciation of tunnel lining behavior due to the construction loads.…”

Section: Introductionmentioning

confidence: 99%

3d-Fem Analysis of Shield Tunnel Construction With Ground-Spring Model

Chaipanna¹,

Jongpradist²

2017

GEOMATE

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ABSTRACT:The shield tunneling has been extensively implemented for construction of underground transportation systems in urban areas. Reports on tunnel segment damage during tunnel construction become increasing. The jack thrust force is the essential cause of damage to the segment. The objective of this article is to present the model which analyzes the behavior of tunnel lining during construction. The model consists of five rings and ten segments for each ring connected together with the shear springs which represent the segment joints and ring joints. The zero thickness interface elements are used to model the segment interface behavior and soil stiffness is represented by mean of ground springs. All relevant construction loads are taken into account in the analysis. The ground spring model is implemented into FEM program ABAQUS to analyze the behavior of segmental lining during construction along straight and curve alignments. The analysis results agree with the measurement data and confirm that the stresses of tunnel segments are governed by jack thrust force. The ground-spring model has been proven to be appropriate for analysis of behavior of the tunnel segments.

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Assessment the influence of ground stratification, tunnel and surface buildings specifications on shield tunnel lining loads (by FEM)

Cited by 75 publications

References 12 publications

Investigation on Tunnel Responses Due to Adjacent Loaded Pile by 3d Finite Element Analysis

Investigation on Tunnel Responses Due to Adjacent Loaded Pile by 3d Finite Element Analysis

Analysis of Forces and Deformation Rule of Existing Shield Tunnel Caused by Ground-heaped Load

3d-Fem Analysis of Shield Tunnel Construction With Ground-Spring Model

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