Study on Design and Selection Techniques for Large-Diameter Shield Railway Tunnel

Abstract

Based on the shield design and construction of the Dongjin tunnel on the southwest ring road of Taiyuan railway terminal, an analysis and discussion on adaptability were conducted in terms of engineering geology, hydro⁃ geology, ambient environment and risk management regarding shield tunnel design and shield selection, with the re⁃ sults showing that shield selection is critical for shield tunnel construction, it′s necessary to master detailed geological survey documents, properly choose shield machine and determine the related technical parameters; soil conditioning and grouting system configuration should be improved during shield construction to well control ground settlement; it is feasible for large-diameter earth-pressure balance shield to be adopted in the strata with complex ambient envi⁃ ronment and the influence on urban residents is reducing to the largest extent.