Effect of interference and Ground Movement by Twin Tunnelling

쌍굴터널 굴진에 따른 주변지반의 거동과 간섭효과

  • 김학문 (단국대학교 토목공학과)
  • Published : 1997.06.01


The behaviour of ground movement during the construction of two parallel tunnels in weathered zone and soft rock has been investigated. All the influencing factors for the behaviour of twin tunnel such as tunnel size, ground conditions, tunnel depth, pillar width and initial state of ground stresses were examined The results of FEM nonlinear analysis were compared with some of model test results in weathered zone to verify the numerical method. It was found that minimum interference was obtained in the parallel construction case when the twin tunnel distance (pillar width) is just over the twice of tunnel diameter. Guide line for the interference of twin tunnelling has been introduced for the ground of weathered zone and soft rock.



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