Analysis of Asymmetrical Deformation of Surface and Oblique Pipeline Caused by Shield Tunneling along Curved Section

The deformation of existing pipelines caused by the tunneling of a shield machine along curved sections has not been sufficiently researched, and a corresponding theoretical prediction formula is lacking. This paper derives a prediction formula for the deformation of an existing pipeline caused by shield machine tunneling along a curved section. Further, a finite difference model (FDM) corresponding to an actual project is built. Finally, the deformation of the surface and existing pipelines caused by shield machine tunneling along the curved section is analyzed. The research results show that the results of theoretical prediction, FDM calculation, and field monitoring data are consistent. In addition, the deformation of the surface and the existing pipeline are asymmetrically distributed when the shield machine tunnels along the curve section instead of symmetrically distributed (for straight line segment). When the pipeline is perpendicular to the tunnel axis, the maximum deformation position of the existing pipeline deviates from the tunnel axis by about 0.5 times the tunnel radius. In addition, as the angle β between the pipeline axis and the tunnel axis increases, the maximum deformation position of the pipeline gradually approaches the tunnel axis.

[1]  Louis Ngai Yuen Wong,et al.  Excavation failure due to pipeline damage during shallow tunnelling in soft ground , 2015 .

[2]  Hideaki Tanahashi,et al.  FORMULAS FOR AN INFINITELY LONG BERNOULLI-EULER BEAM ON THE PASTERNAK MODEL , 2004 .

[3]  Zhiguo Zhang,et al.  Mechanical effects of tunneling on adjacent pipelines based on Galerkin solution and layered transfer matrix solution , 2013 .

[4]  Feng Yu,et al.  Effects of above-crossing tunnelling on the existing shield tunnels , 2016 .

[5]  Yaolin Yi,et al.  General solutions for the longitudinal deformation of shield tunnels with multiple discontinuities in strata , 2021 .

[6]  Panpan Guo,et al.  Ground Deformation Characteristics Induced by Mechanized Shield Twin Tunnelling along Curved Alignments , 2021 .

[7]  R. D. Mindlin.  Force at a Point in the Interior of a Semi-Infinite Solid , 1936 .

[8]  Dingli Zhang,et al.  Semi-analytical prediction for tunnelling-induced ground movements in multi-layered clayey soils , 2020 .

[9]  Shao-hua Li,et al.  Analysis of additional stress for a curved shield tunnel , 2021 .

[10]  X. Dai,et al.  Influence of tunnelling on the deformation of the overlying excavation bracing system and analysis of countermeasures , 2021 .

[11]  J. Bosch,et al.  Kinematic behaviour of a Tunnel Boring Machine in soft soil: Theory and observations , 2015 .

[12]  Wen-Chieh Cheng,et al.  Shield tunnel uplift and deformation characterisation: A case study from Zhengzhou metro , 2018, Tunnelling and Underground Space Technology.

[13]  J. Qian,et al.  A simplified two-stage method to estimate the settlement and bending moment of upper tunnel considering the interaction of undercrossing twin tunnels , 2021, Transportation Geotechnics.

[15]  Hehua Zhu,et al.  Experimental and analytical study on longitudinal bending behavior of shield tunnel subjected to longitudinal axial forces , 2019, Tunnelling and Underground Space Technology.

[16]  Jie Zhang,et al.  Mechanical response analysis of the buried pipeline due to adjacent foundation pit excavation , 2018, Tunnelling and Underground Space Technology.

[17]  Janosch Stascheit,et al.  Advanced finite element modeling of excavation and advancement processes in mechanized tunneling , 2016, Adv. Eng. Softw..

[18]  B. Zhu,et al.  Theoretical method for an elastic infinite beam resting on a deformable foundation with a local subsidence , 2020 .

[19]  P. Oreste,et al.  The influence of the two-component grout on the behaviour of a segmental lining in tunnelling , 2021 .

[20]  J. G. Potyondy.  Skin Friction between Various Soils and Construction Materials , 1961 .

[21]  Qixiang Yan,et al.  Model tests on longitudinal surface settlement caused by shield tunnelling in sandy soil , 2019, Sustainable Cities and Society.

[22]  Maosong Huang,et al.  Simplified analytical method for evaluating the effects of adjacent excavation on shield tunnel considering the shearing effect , 2017 .

[23]  Daniel Dias,et al.  Three-dimensional numerical simulation of pile-twin tunnels interaction – Case of the Shiraz subway line , 2019, Tunnelling and Underground Space Technology.

[24]  R. K. Mohanty.  An unconditionally stable finite difference formula for a linear second order one space dimensional hyperbolic equation with variable coefficients , 2005, Appl. Math. Comput..

[25]  K. Y. Lo,et al.  Subsidence owing to tunnelling. I. Estimating the gap parameter , 1992 .

[26]  Qianqian Li,et al.  Effects of twin tunnels construction beneath existing shield-driven twin tunnels , 2015 .

[27]  Mingyu Li,et al.  The influence of shallow buried double-line parallel rectangular pipe jacking construction on ground settlement deformation , 2020 .

[28]  S. Miliziano,et al.  Predicted and observed settlements induced by the mechanized tunnel excavation of metro line C near S. Giovanni station in Rome , 2019, Tunnelling and Underground Space Technology.

[29]  Xiongyao Xie,et al.  Effects of curved shield tunnelling adjacent to existing power tunnel , 2018 .

[30]  Helin Fu,et al.  Ground loss model for analyzing shield tunneling-induced surface settlement along curve sections , 2022, Tunnelling and Underground Space Technology.

[31]  Zhende Hou,et al.  Mechanical characterization of the load distribution on the cutterhead–ground interface of shield tunneling machines , 2015 .

[32]  Hiroyoshi Hirai,et al.  Settlements and stresses of multi‐layered grounds and improved grounds by equivalent elastic method , 2008 .

[33]  Jian Yu,et al.  Effects of tunnelling on existing pipelines in layered soils , 2012 .

[34]  Eduardo Alonso,et al.  Negative skin friction on piles: a simplified analysis and prediction procedure , 1984 .

[35]  Shao-hua Li,et al.  Numerical analysis of ground displacement and segmental stress and influence of yaw excavation loadings for a curved shield tunnel , 2020 .

[36]  Dongming Zhang,et al.  Analytical solution for the response of an existing tunnel to a new tunnel excavation underneath , 2019, Computers and Geotechnics.

[37]  Jorgin Qi Wen Tan,et al.  Estimating the effects of tunnelling on existing jointed pipelines based on Winkler model , 2019, Tunnelling and Underground Space Technology.

[38]  H. Lai,et al.  Settlement behaviors of existing tunnel caused by obliquely under-crossing shield tunneling in close proximity with small intersection angle , 2020 .

[39]  Cheng Yu,et al.  Mechanical behavior analysis of buried pipeline under stratum settlement caused by underground mining , 2020 .

[40]  D. Dias,et al.   Interaction between an underground parking and twin tunnels – Case of the Shiraz subway line , 2020 .

[41]  C Sagaseta,et al.  ANALYSIS OF UNDRAINED SOIL DEFORMATION DUE TO GROUND LOSS , 1987 .

[42]  Pengpeng Ni,et al.  Fragility analysis of gray iron pipelines subjected to tunneling induced ground settlement , 2018, Tunnelling and Underground Space Technology.

[43]  Huai-na Wu,et al.  Deformation behaviors of existing tunnels caused by shield tunneling undercrossing with oblique angle , 2019, Tunnelling and Underground Space Technology.