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<p>As urban rail networks expand, the spatial relationships between new tunnels and existing structures become increasingly complex. The construction of metro shields often intersects with underground stations and other structures, resulting in soil disturbances and stress transfer that can threaten stability. This paper analyzes the impact of shield construction on the deformation of a bus company building located above the metro line. A plane strain model is developed using GTS NX software to examine the effects of close-range side penetration on existing buildings. The findings reveal that the rigidity of the upper structure and the presence of pile foundations reduce both vertical and horizontal displacements of the ground surface on the pile side, as well as the width of the settlement trough caused by tunnel construction. Notably, due to the pile group effect, there is significant partitioning of the disturbance transmission from distant piles during tunnel excavation, which is observed in the nearby piles. After the excavation is completed, a unilateral settlement of 7.79 mm and a maximum horizontal displacement of 10.8 mm are recorded for the building, resulting in an inclination rate of 0.458%.</p>

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Stress Analysis and Settlement Observations for a Case Study of Tunneling Interactions with Existing Structures Using Midas GTS NX Software

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • Z. B. Wang,
  • J. X. Wei,
  • J. W. Fu,
  • T. Li,
  • H. Haeri,
  • L. J. Shangguan

摘要

As urban rail networks expand, the spatial relationships between new tunnels and existing structures become increasingly complex. The construction of metro shields often intersects with underground stations and other structures, resulting in soil disturbances and stress transfer that can threaten stability. This paper analyzes the impact of shield construction on the deformation of a bus company building located above the metro line. A plane strain model is developed using GTS NX software to examine the effects of close-range side penetration on existing buildings. The findings reveal that the rigidity of the upper structure and the presence of pile foundations reduce both vertical and horizontal displacements of the ground surface on the pile side, as well as the width of the settlement trough caused by tunnel construction. Notably, due to the pile group effect, there is significant partitioning of the disturbance transmission from distant piles during tunnel excavation, which is observed in the nearby piles. After the excavation is completed, a unilateral settlement of 7.79 mm and a maximum horizontal displacement of 10.8 mm are recorded for the building, resulting in an inclination rate of 0.458%.