Semi-analytical prediction for tunnelling-induced ground movements in multi-layered clayey soils

Cao, Liqiang; Zhang, Dingli; Fang, Qian

doi:10.1016/j.tust.2020.103446

Cited by 26 publications

(17 citation statements)

References 35 publications

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“…According to Figure 3, the curve obtained from the ABAQUS software is closer to the curve obtained by the Cao et al [13] method and shows some overlap. Also, the two curves obtained from the numerical modeling and Cao et al [13] intersect at a distance of 15 meters from the tunnel axis, which can be due to the boundary conditions defined by Cao et al [13] method obtained from experimental observations and simple hypotheses. Besides, these relationships are just for undrained conditions.…”

Section: Comparison Of the Present Study With The Previous Researchmentioning

confidence: 59%

“…Fig. 3 compares the amount of surface settlement with increasing distance from the tunnel center in the analytical relationships presented by Cao et al [13] and Bobet [8] with the numerical modeling used in the present study. In this comparison, the diameter of the tunnel is equal to 3 meters, and the tunnel burial depth is equal to 30 meters.…”

Section: Comparison Of the Present Study With The Previous Researchmentioning

confidence: 90%

“…They concluded that a distance of 13 times the diameter of the tunnel was sufficient to minimize the effect of boundaries on the results. Extensive studied [13][14][15][16] were conducted on the reaction of different structures due to the construction of underground tunnels and ground subsidence by finite element method. They concluded that the reaction of structures significantly depends on the type and shape of the structure as well as soil conditions.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Numerical Study of the Effect of Tunneling on Surface Settlement and Existing Buildings

2021

IJE

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This study aimed to determine the effect of various influencing parameters such as tunnel diameter (D), depth (H), width (B), length (L), number of floors, and the horizontal distance of the building from the tunnel axis (X), as well as soil properties such as internal friction angle (ϕ), Poisson ratio (υ), modulus of elasticity (E), and cohesion (C) on surface settlement using ABAQUS finite element software. According to the results, the settelment increases with increasing tunnel diameter at a constant depth, while it decreases with increasing tunnel depth. Changes in the width and length of the building also affect the settlement directly; consequently, as the width and length of the building increase due to increasing the cross-sectional area of the building and its rigidity and stiffness, the settlement of the foundation becomes more uniform and resistant to displacement, leading to a decrease in the surface settlement. Also, as the distance of the building from the tunnel axis increases, the settlement decreases and follows a constant trend after a distance equal to the tunnel diameter. Based on the results of the sensitivity analysis, the depth of the tunnel has the greatest effect on the surface settlement, which can be prevented by controlling the depth of the tunnel from the ground surface. Also, among the soil geomechanical parameters, the modulus of elasticity had the greatest effect on settlement in the present study. Finally, according to the results, the effect of tunnel, building, and soil properties on surface settlement is very important, particularly in urban environments.

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Section: Comparison Of the Present Study With The Previous Researchmentioning

confidence: 59%

Section: Comparison Of the Present Study With The Previous Researchmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Numerical Study of the Effect of Tunneling on Surface Settlement and Existing Buildings

2021

IJE

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“…Ground. Studies have shown that the settlement trough is much wider and shallower when tunnelling in clayey soils than that in sandy soils [46]. e difference is mainly caused by the deformation stiffness between different soil types on a macroscale [49].…”

Section: Ground Movement Prediction Of Composite Multilayeredmentioning

confidence: 97%

“…e main disaster characteristic of each typical soil is analyzed, with emphasis on the study of composite multilayered ground. Firstly, based on the elastic equivalent theory [44] combined with L & P formula [45], ground movements can be obtained by the semianalytical method [46] when tunnelling in multilayered ground.…”

Section: Introductionmentioning

confidence: 99%

Movements and Its In‐Process Control of Ground and Built Structures due to Tunnelling in Urban Areas

Zhang

Cao

Fei

et al. 2022

Advances in Civil Engineering

Self Cite

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Tunnelling-induced environmental responses including ground movements and deformation of the environmental structures are the two prominent issues needed to be carefully disposed in urban areas. This paper tries to develop a theoretical framework to evaluate and control the environmental deformation to avoid two disasters including ground collapse and structural failure. According to the mechanical responses of the ground due to tunnelling, the urban ground in China can be roughly divided into three types including composite multilayered ground, highly water-bearing ground, and mixed rock ground. The displacements of ground and environmental structures due to tunnelling in multilayered ground are emphatically discussed in view of its largest proportion distribution. The cumulative and mutational characteristics of the displacements are considered, which can be the main basis for distinguishing the occurrence of two types of disasters. Based on the development of the displacements, the three-stage evolution model of disaster is established. Combined with the existing displacement and degeneration of the ground and structures and the safety factor, the displacement control standards can be eventually determined. The theoretical framework of in-process control is established which is based on the prediction, measurement, and control standards of the displacements. In the framework, the prediction model can be modified in time, and the tunnelling parameters can be adjusted synchronously. The current research is successfully applied in the Qinghuayuan Tunnel Project.

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Mechanical responses of multi-layered ground due to shallow tunneling with arbitrary ground surface load

Hong

Zhang

Sun

2023

Front. Struct. Civ. Eng.

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Semi-analytical prediction for tunnelling-induced ground movements in multi-layered clayey soils

Cited by 26 publications

References 35 publications

A Numerical Study of the Effect of Tunneling on Surface Settlement and Existing Buildings

A Numerical Study of the Effect of Tunneling on Surface Settlement and Existing Buildings

Movements and Its In‐Process Control of Ground and Built Structures due to Tunnelling in Urban Areas

Mechanical responses of multi-layered ground due to shallow tunneling with arbitrary ground surface load

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