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Determination of Safety Distance of Twin Tunnel Underpassing Existing Tunnels
New tunnel underpassing the existing tunnel construction forms a complex stress-coupling zone above it, causing uneven settlement. In order to ensure the safety of existing tunnels, it is necessary to determine the minimum safe construction distance for tunnels that pass through existing tunnels. Based on this, the FLAC3D finite difference method is used to construct a three-dimensional numerical model of the new tunnel that is orthogonal to the existing tunnel. The effect of different surrounding rock conditions on the settlement of the existing tunnel structure is discussed. Effect of different surrounding rock conditions on the settlement of the existing tunnel structure is discussed. It is determined that the new tunnel underpass different surrounding rock conditions. There is a minimum safe construction distance for the tunnel. On this basis, the effect of grouting reinforcement on the settlement of existing tunnels under the soft and broken surrounding rock is given. The results of the study can be used to determine the safety distance for the construction of a similarly built tunnel that is orthogonal to the existing tunnel.
Determination of Safety Distance of Twin Tunnel Underpassing Existing Tunnels
New tunnel underpassing the existing tunnel construction forms a complex stress-coupling zone above it, causing uneven settlement. In order to ensure the safety of existing tunnels, it is necessary to determine the minimum safe construction distance for tunnels that pass through existing tunnels. Based on this, the FLAC3D finite difference method is used to construct a three-dimensional numerical model of the new tunnel that is orthogonal to the existing tunnel. The effect of different surrounding rock conditions on the settlement of the existing tunnel structure is discussed. Effect of different surrounding rock conditions on the settlement of the existing tunnel structure is discussed. It is determined that the new tunnel underpass different surrounding rock conditions. There is a minimum safe construction distance for the tunnel. On this basis, the effect of grouting reinforcement on the settlement of existing tunnels under the soft and broken surrounding rock is given. The results of the study can be used to determine the safety distance for the construction of a similarly built tunnel that is orthogonal to the existing tunnel.
Determination of Safety Distance of Twin Tunnel Underpassing Existing Tunnels
Lecture Notes in Civil Engineering
Tutumluer, Erol (editor) / Chen, Xiaobin (editor) / Xiao, Yuanjie (editor) / Fu, Helin (author) / An, Pengtao (author) / Huang, Zhen (author) / Zhang, Jiabing (author) / Shi, Yue (author) / Yao, Guojing (author)
Advances in Environmental Vibration and Transportation Geodynamics ; Chapter: 55 ; 839-848
2020-04-08
10 pages
Article/Chapter (Book)
Electronic Resource
English
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