Issue |
E3S Web Conf.
Volume 512, 2024
2024 International Conference on Urban Construction and Transportation (UCT 2024)
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Article Number | 02009 | |
Number of page(s) | 7 | |
Section | Construction Material Research and Urban Environmental Planning | |
DOI | https://doi.org/10.1051/e3sconf/202451202009 | |
Published online | 10 April 2024 |
Study on the influence of structural spacing on the deformation caused by the excavation of shield underpass socket pipe gallery
a State Grid Fujian Electric Power Co., Ltd., 257 Wusi Road, Fuzhou, 350001, PRC, China
b Economic and Technical Research Institute of State Grid Fujian Electric Power Co., Ltd, 68 Chayuan Road, Fuzhou 350011, PRC, China
c PowerChina Fujian Electric Power Engineering Co., Ltd., 268 Wusi Road, Fuzhou 350003, PRC, China
In a prefabricated composite pipe gallery with socket joints, the repeated loading and unloading effect of shield construction on the overlying soil and the existing pipe gallery may cause considerable deformations to the pipe gallery at the joint while ensuring its own bearing capacity. The shield tunnelling underneath the existing pipe gallery project of the Fuzhou Metro was used as a basis to model the socket pipe gallery on ABAQUS finite element software. The influence of changes in the pipe-tunnel spacing on the deformation and displacement of the pipe gallery and stratum were investigated. It was found that when the shield passes through the pipe gallery with 0.25 times the tunnel diameter, in addition to the settlement area of the disturbance centre, uplift areas are created on both sides of the pipe gallery and the surface. Meanwhile, because of the socket structure of the pipe gallery, the vertical displacement of the pipe gallery is not synchronized with the settlement of the lower soil. Furthermore, with the increase in the pipe-tunnel spacing, the settlement trough of the vertical displacement curve of the pipe gallery and the stratum are gradually broadened, and the peak settlement gradually increases.
© The Authors, published by EDP Sciences, 2024
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