Analysis on inner force and deformation characteristics of large shallow shield tunnel cross section

作者：Zhou, Song; Han, Lei; Ye, Guanlin; Wang, Jianhua

来源：China Civil Engineering Journal, 2015, 48: 284-287.

• Internal forces
• Shallow overburden
• Shield tunnel
• Structure modeling
• Tunnel deformation

In this paper, a 3D load-structure model was created to investigate the influence of thickness of burial soil and the lateral earth pressure coefficient on the internal forces and deformations of tunnel segment. The study results indicated that small overburden led to a “standing duck egg”deformation. In the case of large overburden, the deformation of the tunnel segment became a “lying duck egg”. The tunnel was circular with the overburden of 9m. With the increase of overburden, the k0of tunnel deformation form changed from “standing duck eggs”to “lying duck egg”increased gradually. The extremum of axial force and bending moment of tunnel segment appeared at the same position under different overburden and k0. The positive and negative bending moment extremum turned different under different overburden.

• 出版日期2015
• 单位上海交通大学