Version 1
: Received: 14 June 2023 / Approved: 14 June 2023 / Online: 14 June 2023 (14:52:30 CEST)
How to cite:
Du, E.; Zhou, L.; Fei, R. Study on the Stress and Deformation Characteristics of Shield Tunneling Through Mining Tunnel Structure. Preprints2023, 2023061060. https://doi.org/10.20944/preprints202306.1060.v1
Du, E.; Zhou, L.; Fei, R. Study on the Stress and Deformation Characteristics of Shield Tunneling Through Mining Tunnel Structure. Preprints 2023, 2023061060. https://doi.org/10.20944/preprints202306.1060.v1
Du, E.; Zhou, L.; Fei, R. Study on the Stress and Deformation Characteristics of Shield Tunneling Through Mining Tunnel Structure. Preprints2023, 2023061060. https://doi.org/10.20944/preprints202306.1060.v1
APA Style
Du, E., Zhou, L., & Fei, R. (2023). Study on the Stress and Deformation Characteristics of Shield Tunneling Through Mining Tunnel Structure. Preprints. https://doi.org/10.20944/preprints202306.1060.v1
Chicago/Turabian Style
Du, E., Lei Zhou and Ruizhen Fei. 2023 "Study on the Stress and Deformation Characteristics of Shield Tunneling Through Mining Tunnel Structure" Preprints. https://doi.org/10.20944/preprints202306.1060.v1
Abstract
In the construction of shield crossing existing mined tunnel without load, it is imperative to develop corresponding design standards that reflect actual engineering force characteristics to ensure the successful completion of tunnel construction. This research uses The MIDAS-GTS finite element software to facilitate the creation of a numerical model of the shield structure for an air-push-over mine tunnel project in Changsha, China, investigating the stress field’s evolution during shield construction, and calculating the maximum positive and negative bending moments and maximum axial forces for different structures and other force states under various construction conditions. This study's findings informed the design and construction optimisation of the shield tunnelling empty-push method. The outcomes of this numerical simulation led to several key findings: (1) The soil density exerted a significantly greater impact on the internal forces of the initial support structure than both the tunnel depth and soil Poisson's ratio. Additionally, a sudden shift in internal forces occurred within the 300-350 mm range when the lining thickness was altered. (2) Factors such as the tunnel depth, soil density, soil Poisson's ratio μ, and lining thickness have a similarly influenced internal forces of the segment and the initial support. Notably, the backfill layer thickness significantly affected the segment’s maximum axial force causing an abrupt change of approximately 300 mm. (3) Under the shield machine equipment’s weight constraint, it is essential to control the guide rail’s thickness, to prevent it from becoming overly large.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
