Journal of Shandong University(Engineering Science) ›› 2021, Vol. 51 ›› Issue (1): 32-38.doi: 10.6040/j.issn.1672-3961.0.2020.331

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Influence of TBM tunnel excavation at different positions on buildings

SUN Jie1, WU Ke1*, ZHENG Yang1, LI Shuchen2, YUAN Chao1, WANG Xiuwei2   

  1. 1. School of Civil Engineering, Shandong University, Jinan 250061, Shandong, China;
    2. School of Qilu Transportation, Shandong University, Jinan 250002, Shandong, China
  • Online:2021-02-20 Published:2021-03-01

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Abstract: In view of the settlement and deformation of existing buildings induced by TBM(tunnel boring machine)tunnel excavation of urban subway, considering the complexity of the actual working conditions of tunnel undercrossing urban buildings, taking the TBM tunnel tunneling in hard rock stratum of Xiaobei Section of Qingdao Metro Line 1 as the actual engineering background, the numerical calculation method was adopted to establish the continuous tunneling of TBM tunnel through several existing buildings. Based on the engineering construction practice, the spatial attribute characteristics of TBM tunnel were systematically studied. The stress-strain state of ground layer and existing buildings induced by TBM tunnel double tunnel driving under existing buildings were studied systematically. The research results showed that the shallower the tunnel depth was, the greater the settlement rate of the buildings affected by the tunnel excavation. In the excavation of double track tunnel, the larger the proportion of buildings affected by the excavation of the tunnel with shorter transverse distance, the greater the tunnel buried depth, the greater the influence of the superposition of double tunnels. When the tunnel passed through the irregular building, it had great influence on the corner of the building and the small building near the large-scale building, so it needed to be monitored in the actual construction.

Key words: subway tunnel, stratum deformation, numerical simulation, influence analysis, TBM

CLC Number: 

  • TU45
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