Structural Engineering and Mechanics

  • 제84권6호
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  • Pages.743-765
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  • 2022
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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PLAXIS 3D simulation, FLAC3D analysis and in situ monitoring of Excavation stability

  • Lei, Zhou (State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University) ;
  • Zahra, Jalalichi (Department of Mining Engineering, Amirkabir University of Technology) ;
  • Vahab, Sarfarazi (Department of Mining Engineering, Hamedan University of Technology) ;
  • Hadi, Haeri (Department of Mining Engineering, Higher Education Complex of Zarand) ;
  • Parviz, Moarefvand (Department of Mining Engineering, Amirkabir University of Technology) ;
  • Mohammad Fatehi, Marji (Department of Mining Engineering, Yazd University) ;
  • Shahin, Fattahi (Department of Mining Engineering, Higher Education Complex of Zarand)
  • 투고 : 2021.12.29
  • 심사 : 2022.12.06
  • 발행 : 2022.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Near-surface excavations may cause the tilting and destruction of the adjacent superstructures in big cities. The stability of a huge excavation and its nearby superstructures was studied in this paper. Some test instruments monitored the deformation and loads at the designed location. Then the numerical models of the excavation were made in FLAC3D (a three-dimensional finite difference code) and Plaxis-3D (a three-dimensional finite element code). The effects of different supporting and reinforcement tools such as nails, piles, and shotcretes on the stability and bearing capacity of the foundation were analyzed through different numerical models. The numerically approximated results were compared with the corresponding in-field monitored results and reasonable compatibility was obtained. It was concluded that the displacement in excavation and the settlement of the nearby superstructure increases gradually as the depth of excavation rises. The effects of support and reinforcements were also observed and modeled in this study. The settlement of the structure gradually decreased as the supports were installed. These analyses showed that the pile significantly increased the bearing capacity and decreased the settlement of the superstructure. As a whole, the monitoring and numerical simulation results were in good consistency with one another in this practically important project.

키워드

과제정보

This work was financially supported by the Science and Technology Department of Sichuan Province (23GJHZ0191); the National Natural Science Foundation of China (52204104); the Open Project of State Key Laboratory of Coal Mine Disaster Dynamics and Control (2011DA105287-FW201905); the Open Fund of Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province (20kfgk01); the Opening Fund of State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology (SKLGP2021K009); the State Key Laboratory for Geo-Mechanics and Deep Underground Engineering, China University of Mining & Technology (SKLGDUEK2111); the Sichuan University postdoctoral interdisciplinary Innovation Fund.

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