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May 9, 2026Scientific Reports0 citationsOpen Access

Deformation mechanisms of an existing tunnel adjacent to deep basement supported by circular beams in soft clays

SQShengguo QiZhejiang Water Conservancy and Hydropower Survey and Design InstituteBWBuxiang WangHohai University

Key Points

  • This research aims to analyze how existing tunnels deform when nearby deep basements are constructed, particularly focusing on the effects of basement geometry.
  • Developed a simplified design chart to categorize tunnel deformation influence zones.
  • Analyzed the linear relationship between tunnel movements and basement geometry.
  • Assessed excavation-induced tunnel deformations for practical engineering applications.
  • The study highlights a direct linear relationship between tunnel movements and basement geometry.
  • The proposed design chart aids engineers in predicting and assessing tunnel deformations effectively.
  • Provides necessary guidelines to implement protective measures during basement design.

Abstract

is approximately 0.6. A linear relationship is observed between tunnel movements and basement geometry. A simplified design chart is developed to categorize tunnel deformation influence zones. This chart provides a practical tool for engineers to assess excavation-induced tunnel deformations and implement necessary protective measures during the design of deep basements adjacent to existing tunnels.

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Cite This Study

Qi et al. (2026) studied this question.

synapsesocial.com/papers/69fecf16b9154b0b82876252https://doi.org/10.1038/s41598-026-50853-z
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