2012•Applied Mechanics and MaterialsOpen access

Technology of Pile Foundation Underpinning in Shield Tunnel of Xi’an Subway

Lan Ma, Jing Wang

Abstract

The technology of shield has been widely used in city subway design, when the shield tunnel encounters a bridge across the river; the key issue is to complete the pile foundation underpinning according to the diverse geological conditions. With an example of subway Shield tunnel project from Xi’an, The paper presents the working procedure and emphases of pile foundation underpinning.Based on the configuration design, both the load beared by one single stake and the distortion of the joists are calculated, the carrying capacity computations indicate that pile foundation underpinning is feasible.

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Key concepts: Underpinning, Foundation (evidence), Shield, Pile, Engineering, Civil engineering, Geotechnical engineering, Distortion (music)