Mechanical responses in the construction process of super-large cross-section tunnel: A case study of Gongbei tunnel

Zhou, Zhenliang; Zhao, Jinpeng; Tan, Zhiying; Zhou, Xin

doi:10.1016/j.tust.2021.104044

Cited by 30 publications

(9 citation statements)

References 34 publications

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“…5. (b), the development trend of surrounding rock pressure shows a rapid increase and then a gradually stable trend, which is similar to the monitoring results of Luo et al, Zhou et al, Zhao et al and others [19,42,45]. The uctuation section in the middle of the time history curve is mainly caused by step excavation.…”

Section: Analysis Of Mechanical 331 Surrounding Rock Pressuresupporting

confidence: 86%

Support mechanical response analysis and surrounding rock pressure calculation method for a shallow-buried super- large-section tunnel in weak surrounding rock

Lai,

Wang,

Tan

et al. 2024

Preprint

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At present, China's demand for high-speed railway construction is constantly increasing, and the construction of Multi line high-speed railway tunnels has been put on the agenda. The design and construction issues of super-large-sections tunnels urgently need to be addressed. The Xiabei mountain No.1 and No.2 tunnels in the Hangzhou-Taizhou Railway are typical shallow-buried super-large-section-tunnels in weak surrounding rock, and their design and construction issues are representative. Eleven monitoring sections were set up in the tunnel, including tunnel deformation, surrounding rock, shotcrete, steel frames, bolts and temporary support mechanical responses. Taking the monitoring data of the most typical cross-section as an example, the mechanical response of the support structure of a shallow-buried super-large-section tunnel was analyzed in detail. Based on previous research results, this paper discusses and summarizes the common construction problems of this type of tunnel, and puts forward corresponding suggestions. The existing formula for calculating surrounding rock pressure has poor applicability to super-large-section tunnels constructed by step excavation, resulting in conservative support parameters. Therefore, based on the monitoring values of surrounding rock pressure at 10 monitoring sections in Xiabei mountain No. 1 and No.2 tunnels, empirical parameters reflecting the impact of step excavation were summarized. Based on the Wang formula and combined with the step excavation empirical parameters, an empirical formula for the surrounding rock pressure of shallow-buried super-large-section tunnels considering step excavation was constructed. The calculated results are in good agreement with the on-site monitoring data. This study can provide a good reference for similar projects.

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Section: Analysis Of Mechanical 331 Surrounding Rock Pressuresupporting

confidence: 86%

Support mechanical response analysis and surrounding rock pressure calculation method for a shallow-buried super- large-section tunnel in weak surrounding rock

Lai,

Wang,

Tan

et al. 2024

Preprint

Self Cite

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“…In the process of shield construction, the ground settlement should be strictly controlled to ensure the normal operation of ground tra c and the safety of the surrounding environment. e stratum where the shield tunnel is located is mainly silty clay and silty sand [13].…”

Section: Project Summarymentioning

confidence: 99%

Three-Dimensional Numerical Simulation of Soil Deformation during Shield Tunnel Construction

Liu

Yang

Liu

et al. 2022

Mathematical Problems in Engineering

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In order to effectively control the ground deformation and ground subsidence during subway construction, three-dimensional numerical simulation of soil deformation during shield tunnel construction is proposed. Based on a subway tunnel project, this essay firstly divides the shield construction process into several stages and analyzes the vertical displacement of soil in each stage. FLAC 3D was used for three-dimensional finite difference numerical simulation. By comparing the numerical simulation results with the field measured data, the soil settlement caused by shield tunnel excavation is studied deeply. The simulation results show that the maximum settlement value of the monitoring data is 0.59 mm, and the maximum settlement value of the numerical simulation is 0.82 mm, with a difference of 0.23 mm. The maximum value of uplift on both sides of the tunnel is 0.41 mm in monitoring data and 0.29 in numerical simulation, with a difference of 0.12 mm. The maximum settlement value of monitoring data is 2.59 mm, and the maximum settlement value of numerical simulation is 3.05 mm, with a difference of 0.46 mm. The maximum value of uplift on both sides of the tunnel is 0.32 mm in monitoring data and 1.89 mm in numerical simulation, with a difference of 1.57 mm. The settlement value of numerical simulation is slightly larger than that of monitoring data. Conclusion. The simulation can well simulate the state of soil uplift on both sides, and the width of settlement groove is in good agreement with the monitoring data.

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“…The fact that the construction of underground tunnels [1] is still mainly carried out manually on site poses various problems or limitations. On the one hand, many tunnel workers are susceptible to occupational diseases due to the dust and lack of direct sunlight in the tunnels; on the other hand, it is difficult to send the appropriate professionals to the site to control the tunnels in some special cases, which requires someone to guide or help remotely.…”

Section: Introductionmentioning

confidence: 99%

Construction and experimental study of a remote operating system solution and validation platform for mobile robotic arms for underground tunnels

Wang,

Han,

et al. 2023

Third International Conference on Control and Intelligent Robotics (ICCIR 2023)

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Mechanical responses in the construction process of super-large cross-section tunnel: A case study of Gongbei tunnel

Cited by 30 publications

References 34 publications

Support mechanical response analysis and surrounding rock pressure calculation method for a shallow-buried super- large-section tunnel in weak surrounding rock

Support mechanical response analysis and surrounding rock pressure calculation method for a shallow-buried super- large-section tunnel in weak surrounding rock

Three-Dimensional Numerical Simulation of Soil Deformation during Shield Tunnel Construction

Construction and experimental study of a remote operating system solution and validation platform for mobile robotic arms for underground tunnels

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