Study on ground settlement and structural deformation for large span subway station using a new pre-supporting system

Jia, Pengjiao; Zhao, Wen; Du, Xi; Chen, Yang; Zhang, Chaozhe; Bai, Qian; Wang, Zhiguo

doi:10.1098/rsos.181035

Cited by 25 publications

(7 citation statements)

References 13 publications

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“…The method consists of jacking in steel pipes to form a pipe-roofing structure and then excavating under the support of the pipe-roofing structure. At present, many metro stations have adopted the pipe-roofing method, such as Xinle Site station of Shenyang Metro Line 2 [4], Dongbeidamalu station of Shenyang Metro Line 10, and Olympic Sports Centre Station on Line 9 [5][6][7]. Pipe jacking is one of the key stages of the pipe-roofing method [8][9][10] and is mainly divided into longitudinal pipe roof, which is jacked longitudinally along the station, and transverse pipe roof, which is jacked transversely along the station, according to the jacking direction.…”

Section: Introductionmentioning

confidence: 99%

Influence of Pipe-Jacking Reaction on Earth Pressure of Back Wall of Pilot Tunnel of Subway Station

et al. 2023

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The study of the distribution form and calculation method of the earth pressure on the back wall of a pilot tunnel under a jacking reaction is very important to ensure the safety and smooth construction of the pipe jacking. Based on a metro station in Shenyang, this paper firstly investigates the effects of the changes in the jacking reaction parameters, such as the loading intensity, loading position, and loading area on the earth pressure and the displacement of the back wall in a pilot tunnel through numerical simulation, and then proposes a formula for calculating the soil reaction on the back wall and verifies it by comparison with the FEA (finite element method) results. The results show that the earth pressure distribution pattern of the back wall is similar to the normal distribution curve under the action of the jacking reaction. The horizontal displacement and earth pressure of the back wall will gradually increase with the increase in the jacking reaction. The horizontal displacement of the back wall is greatest when the load is applied to the middle wall, followed by the top wall and the bottom wall. The maximum horizontal displacement is reduced by approximately 24.25% when the loading position changes from the middle to the bottom. As the loading area increases, the maximum horizontal displacement of the back wall decreases, in the order of 11.8% and 14.45% relative to the previous level. The earth pressure of the back wall also decreases, in the order of 17.92% and 22.76% relative to the previous level. The equations presented are applicable to the calculation of the soil reaction in the limit state.

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Section: Introductionmentioning

confidence: 99%

Influence of Pipe-Jacking Reaction on Earth Pressure of Back Wall of Pilot Tunnel of Subway Station

et al. 2023

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“…The previous studies conducted low-cyclic, reversed loading tests on composite shear walls with concealed bracings in steel-tube frames [34,35]. The software ABAQUS can simulate accurately various structural forms in the field of architecture, and is suitable for simulating experimental structural components and for obtaining accurate results [36][37][38][39][40][41]. The current study simulated low-cyclic, reversed loading tests conducted with four test pieces (from previous study [34,35]) and 24 additional virtual test pieces using ABAQUS.…”

Section: Introductionmentioning

confidence: 99%

Restoring Force Model for Composite-Shear Wall with Concealed Bracings in Steel-Tube Frame

Ding

Suizi

2022

Buildings

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Establishing a restoring force model is a fundamental yet critical task for the analysis of structural responses to earthquakes. Such a model has a substantial impact on the structural analysis results. Composite-shear walls with concealed bracings in steel-tube frames (composite-shear walls) offer several advantages, including convenient construction processes, high-bearing capacity, and excellent ductility. In this study, the mechanical properties of virtual test pieces were simulated when subjected to low-cyclic-reversed loading in ABAQUS. The simulation results agreed well with the experimental results. Subsequently, 24 additional virtual test pieces were obtained by adjusting the parameters of the original four test pieces, including the strength of the recycled concrete, thickness of the wallboard, and axial compression ratio. Finally, the restoring force model was validated using the experimental test results from our previous study. The results demonstrate the excellent performance of the proposed restoring force model in simulating the mechanical response of a composite shear wall. In particular, this model can accurately reflect the restoring force characteristics of the composite shear wall explored in this study. The restoring force model provides an effective theoretical support for the analysis of the elastoplastic seismic response of similar types of structures.

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“…Yang and Wang [22] analyzed the effect of metro tunnel excavation on the deformation of existing stations. Jia et al [23] studied the surface settlement and structural deformation of a new type of prebracing system for large-span subway stations. Zhang [24] carried out a study of shield tunneling through viaduct pile foundation underpinning.…”

Section: Introductionmentioning

confidence: 99%

Study on Settlement and Deformation of Urban Viaduct Caused by Subway Station Construction under Complicated Conditions

Luo

Cheng

Bai

et al. 2021

Advances in Civil Engineering

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With the rapid development of urbanization, the speed of constructing urban underground space and ground foundation engineering is accelerated. With the shortage of land resources, the distance between underground engineering and surface engineering is getting closer and closer, and the contradictions and problems between projects are becoming more and more serious. Based on the new subway station, this paper passes the existing urban viaduct in a short distance. The settlement and deformation of pile foundation and buildings caused by the excavation of the subway station is studied by using ROCSCIENCE software and site monitoring method. The potential risk sources around the station are pile foundations 18.5 m away, residential buildings 15 m away, storm water pipes 7.3 m away, and high-pressure gas pipes at 5.6 m. According to the construction requirements of pile foundation settlement deformation during metro station excavation, we set up construction standards. The settlement of the buildings and pipelines around the metro station should not exceed 3 mm, and the horizontal displacement should not exceed 2 mm. The diaphragm wall is adopted to surround the subway station, and the ground is reinforced by advanced grouting. The results show that, during the excavation of the foundation pit of the metro station, the ground and the building will have obvious settlement deformation and the depth of deformation can reach 9 mm, which is more than the allowable value. The settlement deformation of the ground and the surrounding buildings can be controlled within 3 mm by strengthening the foundation pit support and ground advance-grouting reinforcement. The control of construction deformation can meet the construction requirements.

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Study on ground settlement and structural deformation for large span subway station using a new pre-supporting system

Cited by 25 publications

References 13 publications

Influence of Pipe-Jacking Reaction on Earth Pressure of Back Wall of Pilot Tunnel of Subway Station

Influence of Pipe-Jacking Reaction on Earth Pressure of Back Wall of Pilot Tunnel of Subway Station

Restoring Force Model for Composite-Shear Wall with Concealed Bracings in Steel-Tube Frame

Study on Settlement and Deformation of Urban Viaduct Caused by Subway Station Construction under Complicated Conditions

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