In many developed countries, underground metros are a common mode of transport to reduce traffic congestion on the roads. Based on the soil profile and type, the depth of the underground metro tunnel varies with location. Construction and operation of a metro tunnel could induce vibration that could affect the performance of structures above the tunnel, within its influence zone. The influence zone is termed as the zone that may experience higher to lower vibration due to construction or train movement. The metro station’s constructions are crucial in densely populated areas, as the construction process is carried out by erecting shoring piles along the station’s perimeter and tunneling by TBM machines (Tunnel-boring machines). As the TBM rotates with much intensity during construction, the soil may experience a shock and differential settlement due to the soil’s behavior. The structure above the tunnel may experience vibration and deformation. Moreover, even after construction, vibrations will be experienced in many structures due to train movement. The tunnel diameter is around 7–10 m according to the need of train activity. The soil-structure interaction plays a vital role, during the vibration of soil surface due to train movement. Major failures such as settlement of the structure, failure of beam-column joint, and reduction in durability of the building may occur due to continuous underground train movement. This paper aims to assess the structural response of residential buildings situated above underground metro tunnels to dynamic train-induced vibrations, with a focus on understanding the potential risks to structural integrity and occupant comfort.

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Study on the Performance of Structures Located Above Underground Metro Tunnel

  • Sathiya Narayanan Sankar,
  • Amal Pradeep,
  • Ashutosh Bagchi

摘要

In many developed countries, underground metros are a common mode of transport to reduce traffic congestion on the roads. Based on the soil profile and type, the depth of the underground metro tunnel varies with location. Construction and operation of a metro tunnel could induce vibration that could affect the performance of structures above the tunnel, within its influence zone. The influence zone is termed as the zone that may experience higher to lower vibration due to construction or train movement. The metro station’s constructions are crucial in densely populated areas, as the construction process is carried out by erecting shoring piles along the station’s perimeter and tunneling by TBM machines (Tunnel-boring machines). As the TBM rotates with much intensity during construction, the soil may experience a shock and differential settlement due to the soil’s behavior. The structure above the tunnel may experience vibration and deformation. Moreover, even after construction, vibrations will be experienced in many structures due to train movement. The tunnel diameter is around 7–10 m according to the need of train activity. The soil-structure interaction plays a vital role, during the vibration of soil surface due to train movement. Major failures such as settlement of the structure, failure of beam-column joint, and reduction in durability of the building may occur due to continuous underground train movement. This paper aims to assess the structural response of residential buildings situated above underground metro tunnels to dynamic train-induced vibrations, with a focus on understanding the potential risks to structural integrity and occupant comfort.