Influence of segmental joints in lining and ground deformability on surface settlements above tunnels

https://tapchi.humg.edu.vn/vi/archives?article=712
  • Cơ quan:

    1 Faculty of Civil Engineering, Hanoi University of Mining and Geology, Vietnam;
    2 Department of Geotechnical Engineering, Grenoble Alpes University, France

  • Nhận bài: 26-08-2016
  • Sửa xong: 30-09-2016
  • Chấp nhận: 20-10-2016
  • Ngày đăng: 20-10-2016
Lượt xem: 1941
Lượt tải: 648
Yêu thích: 5.0, Số lượt: 64
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Tóm tắt:

The development of transportation in large cities requires the construction of tunnels. In many tunnelling projects, surface settlements have been observed. Most of the cases reported in the literature focus on considering the effect of ground conditions, tunnel size, depth, surface loads, and construction process on the ground surface settlement. However, the effect of joints between segments is not considered in the precast concrete lining in these cases. A numerical study of the settlements above a tunnel at the Bologna metro project is performed which made it possible to include the influence of joint characteristics such as joint number, joint distribution, joint rotational stiffness and deformability of ground on the surface settlement. Analysis is carried out using a two-dimensional finite difference element model. The results show a negligible influence of joint distribution, joint number and joint rotational stiffness on the surface settlement. On the other hand, the Young’s modulus of the ground must be well known due to its significant influence

Trích dẫn
Anh Ngoc Do và Daniel Dias, 2016. Influence of segmental joints in lining and ground deformability on surface settlements above tunnels, Tạp chí Khoa học kỹ thuật Mỏ - Địa chất, số 56.