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<p>The present study introduces a novel hybrid approach for building risk assessment of existing buildings adjacent to proposed tunnel construction, employing a design methodology based on the limiting tensile strain method integrated with advanced PLAXIS 2D simulations. Ground deformations induced by tunnelling were modelled in PLAXIS 2D for controlled volume loss (<i>V</i><sub>L</sub>) scenarios and validated against traditional empirical–analytical approaches. The deformation results obtained by PLAXIS 2D were directly applied beneath the building foundations to evaluate its impact on structural integrity, and maximum tensile strain values were calculated to predict potential damage levels and classify risk categories. To understand the sensitivity of these predictions, a detailed parametric analysis was conducted, exploring the influence of key variables, including tunnel diameter (<i>D</i>), tunnel axial depth from the ground surface (<i>z</i>) and volume loss (<i>V</i><sub>L</sub>), soil parameters such as soil stiffness (<i>E′</i><sub>ref</sub>) and shear strength parameters (undrained shear strength, <i>s</i><sub>u</sub> and friction angle, <i>ϕ′</i>) and stiffness of structure (<i>E/G</i>) on the maximum tensile strains in buildings and damage category. Results reveal that structural stiffness and tunnel parameters have the most pronounced effect on tensile strain and potential damage, with soil parameters playing a secondary role.</p>

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Building risk assessment of existing buildings near a proposed tunnel

  • 期刊论文

  • 发表日期：

    2025年8月20日

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  • Jyoti Agarwal,
  • Raju Sarkar

摘要

The present study introduces a novel hybrid approach for building risk assessment of existing buildings adjacent to proposed tunnel construction, employing a design methodology based on the limiting tensile strain method integrated with advanced PLAXIS 2D simulations. Ground deformations induced by tunnelling were modelled in PLAXIS 2D for controlled volume loss (VL) scenarios and validated against traditional empirical–analytical approaches. The deformation results obtained by PLAXIS 2D were directly applied beneath the building foundations to evaluate its impact on structural integrity, and maximum tensile strain values were calculated to predict potential damage levels and classify risk categories. To understand the sensitivity of these predictions, a detailed parametric analysis was conducted, exploring the influence of key variables, including tunnel diameter (D), tunnel axial depth from the ground surface (z) and volume loss (VL), soil parameters such as soil stiffness (E′ref) and shear strength parameters (undrained shear strength, su and friction angle, ϕ′) and stiffness of structure (E/G) on the maximum tensile strains in buildings and damage category. Results reveal that structural stiffness and tunnel parameters have the most pronounced effect on tensile strain and potential damage, with soil parameters playing a secondary role.