This paper chooses the section between the stations of Majiapu Donglu and Yongdingmenwai Dajie on Beijing subway line 14 as the object, adopting a method of numerical simulation to analyze the function of grouting reinforcement in control of deformation of the earth surface while a shield tunnel crosses below the Beijing-Tianjin intercity high speed railway. A 3D numerical model is made to simulate the construction process of a shield tunnel crossing below a high speed railway with a top speed of 350km/h and the requirement of a differential settlement of less than 5mm between the two rails. The calculation result indicates that grouting reinforcement to the stratum of a certain extension of the crossing section can effectively control the settlement of the existing railway caused by shield tunneling so as to ensure safety operation of the railway. And the behind-segment grouting parameters and soil compartment pressure in the shield structure gained in the study can be instructional for further design and construction of tunnels.
Analysis of the Influence upon the Beijing-Tianjin Intercity High Speed Railway by a Subway Shield Tunnel Crossing Below
Ninth Asia Pacific Transportation Development Conference ; 2012 ; Chongqing, China
Sustainable Transportation Systems ; 438-446
2012-06-28
Conference paper
Electronic Resource
English
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