Interaction Analyses between Existing Pipeline and Quasi-Rectangular Tunneling in Clays
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pISSN 1226-7988, eISSN 1976-3808 www.springer.com/12205
DOI 10.1007/s12205-020-2366-2
Tunnel Engineering
Interaction Analyses between Existing Pipeline and Quasi-Rectangular Tunneling in Clays Zhiguo Zhanga,b,c, Mengxi Zhangd, Qihua Zhaoe, Lei Fanga, Zhi Dingf, and Minzhi Shia a
School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China Department of Civil and Environmental Engineering, National University of Singapore, Singapore 119576, Singapore c Key Laboratory of Urban Underground Engineering of Ministry of Education, Beijing Jiaotong University, Beijing 100044, China d Dept. of Civil Engineering, Shanghai University, Shanghai 200444, China e State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China f Department of Civil Engineering, Zhejiang University City College, Hangzhou 310015, China b
ARTICLE HISTORY
ABSTRACT
Received 3 January 2020 Revised 2 July 2020 Accepted 31 July 2020 Published Online 30 October 2020
Previous researches about geoenvironmental disturbance caused by tunneling have mainly concentrated on the influences of circular tunnel construction, but minimal interesting is given to the quasi-rectangular shield tunneling. Considering the convergence deformation model for quasi-rectangular shield tunneling at excavation face, the simplified closed-form solution is put forward to evaluate the deformation behavior for underground pipeline caused by quasirectangular shield tunneling. Firstly, the free-field displacements induced by the quasirectangular shield excavation are estimated by the point source technique. Secondly, characterized by the Winkler foundation, the free-field displacements are applied to the pipeline structures and a simplified analytical solution is obtained for analyzing the deformation of adjacent pipeline induced by quasi-rectangular tunneling. Through the analyses of engineering cases, the comparison between analytical solution for the free-field deformation and measured data is conducted. Meanwhile, the numerical simulation technique and the physical modelling tests for the pipeline deformation are utilized to compare the simplified analytical results. In addition, the primary parameters are conducted for the interaction mechanics between quasi-rectangular tunneling and existing pipeline, such as the pipeline diameter, the geometry size and centerline depth of pipeline and tunnel, the structural physics modulus of pipeline, the compressive modulus of ground, and the ground loss parameter. The results of this study are of great significance for exploring the geomechanical effects induced by quasirectangular shield tunneling in clays.
KEYWORDS Quasi-rectangular shield Pipeline Interaction analyses Simplified analytical solution Numerical simulation Physical modelling test
1. Introduction With the rapid development for urban rail transportation systems, shield tunnel has become the popular choice of subway construction and the biggest advanta
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