Numerical Investigation and Prediction of Side-By-Side Tunneling Effects on Buried Pipelines

Jinquan Wang (), Juntong An, Shenyi Zhang, Ruoyu Ge, Qiwu Xie, Qingshu Chen, Sizhuo Zheng and Mingge Ye ()
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Jinquan Wang: School of Transportation, Southeast University, Nanjing 211189, China
Juntong An: School of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, China
Shenyi Zhang: School of Rail Transportation, Soochow University, Suzhou 215131, China
Ruoyu Ge: CCDI (Suzhou) Exploration & Design Consulting Co., Ltd., Suzhou 215123, China
Qiwu Xie: School of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, China
Qingshu Chen: School of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, China
Sizhuo Zheng: School of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, China
Mingge Ye: School of Civil Engineering, Sun Yat-sen University, Guangzhou 510275, China

Sustainability, 2022, vol. 15, issue 1, 1-18

Abstract: With the fast development of underground space engineering, it is inevitable for buried pipelines to be crossed by twin tunnels. Previous studies mainly focused on the single-tunneling effects on pipelines. To emphasize the twin-tunneling effects on buried pipelines, we first examined the effectiveness of the ground settlement prediction method under twin-tunneling conditions. Then, the estimated ground settlement boundary condition was applied to the beam-on-spring finite element model. The numerical results show that with the decrease in tunnel depth and twin tunnel space, the values and positions of the maximum ground settlement and longitudinal pipe bending behavior both changed significantly. The biased distance of the maximum settlement position and the distance to the inflection point of the final ground settlement curve can be obtained by curve fitting. Based on that, a semi-empirical prediction method for the longitudinal pipe bending strain was proposed. The predicted values matched quite well with the numerical results, which can thus provide a quick and effective structural safety and integrity assessment approach for buried pipelines subjected to twin-tunneling conditions.

Keywords: buried pipeline; twin tunnel; ground settlement; bending strain (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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