Effect of dynamic cutterhead on face stability in EPB shield tunneling

Jin, Dalong; Zhang, Zhiyong; Yuan, Dajun

doi:10.1016/j.tust.2021.103827

Cited by 47 publications

(7 citation statements)

References 34 publications

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“… The data of shield operational parameters can be used to analyze the relationship with the geological characteristics during shield tunnelling [2 , 3] . The data of geological characteristics in each lining ring can be applied to ensure the safety of shield tunnelling process and arrange the schedule of construction [4 , 5] .…”

Section: Value Of the Datamentioning

confidence: 99%

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Data on prediction of geological characteristics during shield tunnelling in mixed soil and rock ground

Yan

2022

Data in Brief

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Section: Value Of the Datamentioning

confidence: 99%

“…The data of shield operational parameters can be used to analyze the relationship with the geological characteristics during shield tunnelling [2 , 3] .…”

Section: Value Of the Datamentioning

confidence: 99%

Data on prediction of geological characteristics during shield tunnelling in mixed soil and rock ground

Yan

2022

Data in Brief

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“…The ultimate ground surface settlement at the right tunnel axis is the maximum, which is 8.4 mm. In addition, previous studies have indicated that the tunneling influence zones depend primarily on parameters such as the tunnel diameter, tunnel cover depth, and soil parameters [54][55][56]. Based on the calculation methods used in the literature and the practical conditions presented in this research work, the diameter of the tunneling influence zones for twin tunneling is approximately 23 m. Thus, obvious superimposed effects can be observed for the ground surface settlements between the two axes of the left tunnel and the right tunnel.…”

Section: Development Of Ground and Pilementioning

confidence: 99%

Temporal-Spatial Characteristics of Ground and Pile Responses to Twin Shield Tunneling in Clays

et al. 2021

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This paper investigates the temporal-spatial characteristics of ground displacements as well as vertical and horizontal displacements and axial forces in existing piles induced by twin shield tunneling in clays. To that end, a case study and three-dimensional (3D) finite element (FE) analysis were performed. Based on the in situ monitoring data from the presented twin tunneling case history with existing piles beneath, the adopted 3D FE method was validated to be competent to yield reasonable simulation results. The validated 3D FE method was then used to analyze the effects of the distance between the tunnel and the pile, the distance between tunnel faces, and the pile length on the horizontal and vertical displacements and axial stresses in piles. It was found that the horizontal displacement distribution forms along the pile shaft for the front piles are similar to that for the back piles, whereas the magnitudes of the horizontal displacements of the front piles are slightly larger than that of the back piles. The interactions between piles in the pile group provide protection of the middle piles in the pile group against twin tunneling effects. With a reduction in the distance between the tunnel and the pile, the pile displacements and stresses increase nonlinearly. With an increase in the distance between tunnel faces, the maximum positive pile displacements and the maximum and minimum axial pile stresses increase, while the maximum negative pile displacements and the difference between the maximum and minimum axial pile stresses decrease.

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“…However, the shield tunneling process is influenced by various factors, such as external construction environment and equipment performance, leading to various abnormal scenarios that might occur. Common abnormal scenarios include sudden geological change [1], mudcake events [2], cutter wear [3], face instability [4], and excessive ground settlement [5]. These not only affect the safety of tunnel construction but also increase project costs.…”

Section: Introductionmentioning

confidence: 99%

Anomaly Detection and Identification Method for Shield Tunneling Based on Energy Consumption Perspective

Hu,

Zhang,

2024

Applied Sciences

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Various abnormal scenarios might occur during the shield tunneling process, which have an impact on construction efficiency and safety. Existing research on shield tunneling construction anomaly detection typically designs models based on the characteristics of a specific anomaly, so the scenarios of anomalies that can be detected are limited. Therefore, the research objective of this article is to establish an accurate anomaly detection model with generalization and identification capabilities on multiple types of abnormal scenarios. Inspired by energy dissipation theory, this paper innovatively detects various anomalies in the shield tunneling process from the perspective of energy consumption and designs the AD_SI model (Anomaly Detection and Scenario Identification model of shield tunneling) based on machine learning. The AD_SI model first monitors the shield machine’s energy consumption status based on the VAE-LSTM (Variational Autoencoder–Long Short-Term Memory) algorithm with a dynamic threshold, thereby detecting abnormal sections. Secondly, the AD_SI model uses the correlation of construction parameters to represent different known scenarios and further clarifies scenarios of the abnormal sections, thus achieving anomaly identification. The application of the AD_SI model in a shield tunneling construction project demonstrates its capability to accurately detect and identify different anomalies, with a recall value exceeding 0.9 and F1 exceeding 0.8, thereby providing guidance for accurately detecting multiple types anomaly scenarios in practical applications.

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Effect of dynamic cutterhead on face stability in EPB shield tunneling

Cited by 47 publications

References 34 publications

Data on prediction of geological characteristics during shield tunnelling in mixed soil and rock ground

Data on prediction of geological characteristics during shield tunnelling in mixed soil and rock ground

Temporal-Spatial Characteristics of Ground and Pile Responses to Twin Shield Tunneling in Clays

Anomaly Detection and Identification Method for Shield Tunneling Based on Energy Consumption Perspective

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