Numerical modeling of ground settlement control of large span underground metro station in Tehran Metro using Central Beam Column (CBC) structure

Kivi, A Valizadeh; Sadaghiani, Mohammad Hossein; Ahmadi, Mohammad Mehdi

doi:10.1016/j.tust.2011.06.007

Cited by 49 publications

(8 citation statements)

References 8 publications

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“…Cavalaro et al [22] used FEM to simulate the effect of contact deficiencies between segmented tunnel liner during tunnel building and the resulting damage procedure with Tunnel Boring Machine. Kivi et al [23] used 3-D finite element analysis to study the impact of the central beam column (CBC) on the stiffness of the supporting tunnel system in the Tehran metro. Liu et al [24] used numerical methods to determine the impact of ground movement and construction in a shield tunneling and expanding construction.…”

Section: Finite Element Modellingmentioning

confidence: 99%

The Effect of Opening Shapes on the Stability of Underground Tunnels: A Finite Element Analysis

Alsabhan

Sadique²,

Ahmad³

et al. 2021

GEOMATE

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Tunnel construction and development has long been an important component of smart cities and modern sustainable development projects around the world. Despite major advances in tunneling technologies, tunneling in rocks remains one of the most mammoth tasks for a geotechnical engineer to complete. Nowadays, all new complex and significant structures are designed and analyzed through finite element techniques. In the present study, numerical simulations have been carried out using the finite element code ABAQUS. Around the tunnel, a specified region of rock mass has been discretized into about 34000 elements. The Continuum Three Dimensional Eight Nodded Reduced integrated (C3D8R) elements were used to model the Tunnel. The effect of the shape of tunnel opening has been studied in three dimensional models using the Elastic Approach Solution Technique. A circular, oval, horse-shoe and square opening of a tunnel have been analyzed. In the current investigation, the behavior of flat head tunnels was also taken into account for comparison purposes. The crown of a flat head and round tubes of equivalent dimensions have shown the most deformation. On the other side, the oval shape has been found to have the fewest deformations at the crown of the opening. Furthermore, the horse-shoe opening, which is the most commonly used tunnel opening shape, has somewhat higher distortion than the oval opening.

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Section: Finite Element Modellingmentioning

confidence: 99%

The Effect of Opening Shapes on the Stability of Underground Tunnels: A Finite Element Analysis

Alsabhan

Sadique²,

Ahmad³

et al. 2021

GEOMATE

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show abstract

“…e construction period of the cut-andcover method is longer than the open-cut method. However, the construction site of the cut-and-cover method is located underground, which has little impact on the surrounding traffic [11,12]. In the construction process of cut-and-cover method, the enclosure structure has little deformation, which can effectively control the deformation of surrounding soil and the surface settlement, and is beneficial to the protection of adjacent buildings and structures [13,14].…”

Section: Introductionmentioning

confidence: 99%

Study on the Applicability of an Improved Pile‐Beam‐Arch Method of Metro Station Construction in the Upper‐Soft and Lower‐Hard Stratum

Guo

Jiang

Wang

2021

Advances in Civil Engineering

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The main challenge for metro station construction is to ensure the construction schedule while minimizing the impact on the surrounding environment. Based on the characteristics of the upper-soft and lower-hard stratum in the Dalian city of China, a special structure with six pilot tunnels and three spans of the pile-beam-arch (PBA) method is proposed and applied to the construction of the Labor Park metro station. In this study, laboratory experiments, numerical simulation analysis, and field monitoring data are used to investigate the applicability of six pilot tunnels and three spans of the PBA method in the process of construction. In the process of numerical simulation, the ground surface settlement, arch vertical displacement, the horizontal displacement of rock mass on both sides of the station, and vertical stress of support structure are analyzed. The numerical simulation results are found to be in good agreement with field measurement. Furthermore, the results indicate that, in the construction of six pilot tunnels and three spans of the PBA method, pilot tunnel construction and arch construction have a great influence on the surface settlement. The part of the initial vertical support of the pilot tunnels is removed, which caused the change of the position of maximum vertical stress and the redistribution of vertical stress. Because of reinforcement by side piles on both sides of the station, the horizontal displacement of the rock mass was reduced by 44.76% compared with that without reinforcement. The six pilot tunnels and three spans of the PBA method can effectively control the surface settlement, arch vertical displacement, and horizontal displacement of the rock mass.

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“…He et al [3] studied the soil disturbance caused by shield tunnelling in complex interbed strata using field test, model test, and particle distinct element method. With the rapid development of computer technology, numerical simulation methods are applied to study the surface settlement caused by tunnel excavation [25][26][27][28][29][30][31][32][33]. Rohola et al [34] considered the un-uniform gap and established a TBM complete model with FLAC3D and studied the rule of LDP variation at different reference points on the circumference of the tunnel and the contact force characteristics of the shield.…”

Section: Introductionmentioning

confidence: 99%

Performance of Slurry Shield Tunnelling in Mixed Strata Based on Field Measurement and Numerical Simulation

Cui

Fang

et al. 2020

Advances in Materials Science and Engineering

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There are severe challenges for slurry pressure balance tunnel boring machine (TBM) tunnelling in sandy cobble soil of Beijing, Chengdu, and Lanzhou in China. And the problems caused by tunnelling from silty clay to sandy cobble stratum are more serious. With the change of stratum, the key parameters and surface settlement will change correspondingly. Controlling the key parameters and predicting the surface settlement accurately and efficiently is important for hazard mitigation and risk management. In this study, based on the Tsinghuayuan Tunnel project in Beijing, the key parameters and surface settlement while tunnelling from silty clay to sandy cobble stratum are studied. Firstly, the difference of key parameters while tunnelling in two different strata is analyzed. The analysis shows that immediate responses to changes in the stratum are recommended in order to ensure construction efficiency. Then, a refined 3D finite difference model is developed to simulate the slurry TBM tunnelling in different strata. For refined simulation, three key parameters obtained from measurement data were applied to the 3D models, and the simulation results were compared with the field data. Results show that the refined model has good performance in terms of the accuracy and efficiency. This study provides a good engineering practice reference for slurry TBM tunnelling in mixed strata.

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Numerical modeling of ground settlement control of large span underground metro station in Tehran Metro using Central Beam Column (CBC) structure

Cited by 49 publications

References 8 publications

The Effect of Opening Shapes on the Stability of Underground Tunnels: A Finite Element Analysis

The Effect of Opening Shapes on the Stability of Underground Tunnels: A Finite Element Analysis

Study on the Applicability of an Improved Pile‐Beam‐Arch Method of Metro Station Construction in the Upper‐Soft and Lower‐Hard Stratum

Performance of Slurry Shield Tunnelling in Mixed Strata Based on Field Measurement and Numerical Simulation

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