Deformation characteristics and safety assessment of a high-speed railway induced by undercutting metro tunnel excavation

Qian, Wangping; Qi, Taiyue; Zhao, Yunjian; Le, Yizhou; Yi, Haiyang

doi:10.1016/j.jrmge.2018.04.014

Cited by 34 publications

(10 citation statements)

References 17 publications

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“…When the deformation reaches a certain degree, it will cause the surface buildings to settle, tilt and even crack. In serious cases, it will also affect the life safety of relevant personnel and the normal use of buildings, resulting in a very bad social impact (Chen et al, 2015;Qian et al, 2019;Ramadan et al, 2021). In order to minimize the adverse effects of shaft and tunnel excavation on strata and buildings, the surface settlement, deformation and shaft tunnel excavation must be deeply studied and effectively predicted (Zhang et al, 2019;Tu et al, 2020;Wang, 2021;Zhou et al, 2021;Lan et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Tunneling construction technology of shafts and cross-passages under strictly controlling deformation of the existing railway

Liu

Xu²,

Li³

et al. 2023

Front. Earth Sci.

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Underground construction will have more or less adverse effects on adjacent existing buildings with more and more existing buildings above ground. However, this situation has only been reported by a small number of researchers. In view of this, this article takes the existing airport line shaft and horizontal passage project in the western suburb of Beijing Metro Line 12 as the background to study the impact of the construction of subway station and shaft passage on the adjacent existing railway. Based on the above project reality, under the action of pavement load, the effects of different parameters (the distance between the surface measuring point and the middle line of the transverse passage and the substep of construction loading sup step) on the surface settlement and track deformation of the shaft and cross-passage through the existing railway are studied by numerical analysis method. The calculation results show that the construction method of shaft and cross passage is reasonable. The comprehensive reinforcement measures of subgrade, rail and hole are effective, effectively controlling the deformation of subgrade and rail within the standard value (surface settlement ≤60 mm, rail deformation ≤6 mm). In addition, the numerical simulation data can better represent the actual situation as a whole.

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Section: Introductionmentioning

confidence: 99%

Tunneling construction technology of shafts and cross-passages under strictly controlling deformation of the existing railway

Liu

Xu²,

Li³

et al. 2023

Front. Earth Sci.

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show abstract

“…Zhao et al [21] determined that grouting curtain measures are the best reinforcement scheme for shield tunneling under a railway bridge through a three-factor and four-level model based on the principle of the orthogonal experiment. Qian et al [22] analyzed the surface settlement characteristics of a tunnel passing through a high-speed railway at different angles in terms of the ground settlement trough, stratum slip line, and track irregularity to provide technical support for the safety evaluation of tunnel crossing high-speed railway projects. Zheng et al [23] used the multistage regulation strategy to control the settlement of the construction of two overlapped tunnels under an existing line and successfully controlled the ground settlement along the railway by continuously adjusting the shield tunneling parameters.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Shield Tunneling Control in Full Section Water-Rich Sand Layer of Collapsible Loess

Mei

Zhang

et al. 2022

Geofluids

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Taking China’s first application of domestic shield tunneling in a water-rich sand layer for crossing a high-speed railway as research background, the influence of changes in the shield tunneling parameters on ground settlement is analyzed based on field tests, and a construction control method suitable for shield tunneling under a risk source in a water-rich sand layer is proposed. The test results show that the use of 10% sodium bentonite as the soil modifier for soil pressure balance shield tunneling into the water-rich sand layer has advantages, while adding 50% loess into the bentonite slurry in the gravel sand layer can greatly improve the impermeability of the soil; the settlement of soil can be effectively reduced by using the special segment with grouting holes for deep grouting and applying the adaptive transformation of the shield cutter. Based on the statistical analysis results, a reasonable range for the cutter head torque, cutter head speed, chamber pressure, bentonite injection volume, and advanced speed in the water-rich sand layer can provide a construction control basis for similar projects and provide data support for the compilation of relevant specifications.

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“…rough the Gaussian curve settlement trough theory and finite element simulation, the impact of shield tunneling on ground settlement also has been fully explored [7][8][9]. Some previous researches shed light on the dynamic response of tunnel advancement [10][11][12][13]. In addition, artificial intelligence methods are gradually being applied to underground engineering [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Research on the Prediction Model of Shield Advancement Rate in Sandy Cobble Ground of Beijing

Li²,

Yang

et al. 2021

Advances in Civil Engineering

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The long distance and tight construction period of the earth pressure balance shield tunneling in Beijing sandy cobble ground have a very positive impact on grasping the construction progress and improving the organization efficiency. Based on the real-time monitoring data of on-site earth pressure, cutter head speed, total thrust, screw conveyor speed, and cutter head torque, this study investigated the correlation between the shield advancement rate and the above parameters based on multiple nonlinear regression analysis method, which lay down the foundation of shield advancement rate prediction. The prediction model achieved satisfactory results and was further applied to an airport project. The results show that it is of guiding significance to use multiple regression method to establish shield prediction model and put forward the best advancement parameters to ensure the construction progress. The order in which the four operational parameters affect the advancement rate is total thrust, cutter head torque, screw conveyor speed, and cutter head speed. When the advancement time is greater than 57 min, the average advancement rate and daily progress are highly positively correlated. The research provides a reliable basis for the advancement rate prediction, safety control, and parameter optimization of shield advancement in similar ground.

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Deformation characteristics and safety assessment of a high-speed railway induced by undercutting metro tunnel excavation

Cited by 34 publications

References 17 publications

Tunneling construction technology of shafts and cross-passages under strictly controlling deformation of the existing railway

Tunneling construction technology of shafts and cross-passages under strictly controlling deformation of the existing railway

Experimental Study on Shield Tunneling Control in Full Section Water-Rich Sand Layer of Collapsible Loess

Research on the Prediction Model of Shield Advancement Rate in Sandy Cobble Ground of Beijing

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