Principle and application of in-situ monitoring system for ground displacement induced by shield tunnelling

Hua, Jiang; Cheng, Jinguo; Jinxun, Zhang; Zhang, Jingling; Su, Yiran; Zheng, Yaofu

doi:10.1016/j.tust.2021.103905

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…The laws of stratum settlement, tunnel displacement and other response caused by excavation are also analysed and summarised by many other scholars through monitoring data, numerical simulation, theoretical analysis and engineering analogy. Jiang et al (2021) adopted a multiple regression analysis methods to eliminate the influence of unstable factors in actual construction on monitoring results, and determined the corrected displacement correction value of main factors (including selected monitoring point coordinates and tunnel parameters). It can be seen that there have been many studies on the undercrossing of the adjacent tunnel.…”

Section: Adjacent Metro Project Sandy Cobble Stratum Computed Tomography Orthogonal Experiments Numerical Calculationmentioning

confidence: 99%

Characteristics of Ground Surface Settlement of Double-Line Adjacent Metro Construction in Sandy Cobble Stratum: A Case Study of Beijing Airport Line

et al. 2021

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Section: Adjacent Metro Project Sandy Cobble Stratum Computed Tomography Orthogonal Experiments Numerical Calculationmentioning

confidence: 99%

Characteristics of Ground Surface Settlement of Double-Line Adjacent Metro Construction in Sandy Cobble Stratum: A Case Study of Beijing Airport Line

et al. 2021

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“…Numerous scholars have extensively researched tunnel engineering monitoring systems. Jiang et al [ 1 ] proposed a real-time monitoring system for surface deformation induced by shield construction in homogeneous strata, combining static-level measurements and single-point displacement meters. This system has been successfully implemented in Beijing Metro Line 14 and the new airport line.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Behavior Monitoring and Load Inversion Analysis of Large-Diameter Underwater Shield Tunnel during Construction

Ma,

Ye,

Liu

et al. 2024

Sensors

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The construction of large-diameter shield tunnels underwater involves complex variations in water and earth load outside the tunnel segment, as well as intricate mechanical responses. This study analyzes the variation laws of external loads, axial forces, and bending moments acting on the segment ring during the shield assembly and removal from the shield tail. It accomplishes this through the establishment of an on-site monitoring system based on the Internet of Things (IoT) and proposes a Bayesian-genetic algorithm model to estimate the water and earth pressure. The fluctuation section exhibits a peak load twice as high as that in the stable section. These variations are influenced by Jack thrust, shield shell force, and grouting pressure. The peak load observed in the fluctuation section is twice as high as the load observed in the stable section. During the shield tail removal process, the internal forces undergo significant fluctuations due to changes in both load and boundary conditions, and the peak value of the axial force during the fluctuation section is eight times higher than that during the stable section, while the peak value of the bending moment during the fluctuation section is five times higher than that during the stable section. The earth and water pressure calculated using the inversion analysis method, which relies on the measured internal forces, closely matches the actual measured values. The results demonstrate that the accuracy of the water and earth pressure obtained through inversion analysis is twice as high as that obtained using the full coverage pressure method. These results can serve as a valuable reference for similar projects.

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“…GS in oil tanks can lead to serious safety hazards such as structural damage during service and production processes [1][2][3][4]. This can cause the leakage of liquid oil and oil vapor.…”

Section: Introductionmentioning

confidence: 99%

Temperature Uncertainty Reduction Algorithm Based on Temperature Distribution Prior for Optical Sensors in Oil Tank Ground Settlement Monitoring

Liu,

Jiang,

Liu

et al. 2024

Sensors

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Ground settlement (GS) in an oil tank determines its structural integrity and commercial service. However, GS monitoring faces challenges, particularly due to the significant temperature differences induced by solar radiation around the tank in daytime. To address this problem, this paper digs out a prior and proposes a temperature uncertainty reduction algorithm based on that. This prior has a spatial Gaussian distribution of temperature around the tank, and numerical simulation and practical tests are conducted to demonstrate it. In addition, combining uniformly packaged sensor probes and the spatial prior of temperature, the temperature uncertainty is verified to be Gaussian-distributed too. Then, the overall temperature uncertainty can be captured by Gaussian fitting and then removed. The practical test verified a 91% reduction rate in temperature uncertainty, and this approach enables GS sensors to effectively perform daytime monitoring by mitigating temperature-related uncertainties.

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Principle and application of in-situ monitoring system for ground displacement induced by shield tunnelling

Cited by 10 publications

References 22 publications

Characteristics of Ground Surface Settlement of Double-Line Adjacent Metro Construction in Sandy Cobble Stratum: A Case Study of Beijing Airport Line

Characteristics of Ground Surface Settlement of Double-Line Adjacent Metro Construction in Sandy Cobble Stratum: A Case Study of Beijing Airport Line

Mechanical Behavior Monitoring and Load Inversion Analysis of Large-Diameter Underwater Shield Tunnel during Construction

Temperature Uncertainty Reduction Algorithm Based on Temperature Distribution Prior for Optical Sensors in Oil Tank Ground Settlement Monitoring

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