Existing tunnel protection is a key problem during urban construction. This paper focus on the inner force in tunnel sections induced by newly built pile foundation including non-displacement pile and displacement pile. ‘Two-step’ method was used in this paper. Firstly

based on the pile foundation theory

Mindlin solution and Column hole expansion theory

the soil displacement induced by non-displacement pile and displacement pile in the tunnel lining was obtained. Then

considering the soil reaction

tunnel section inner force induced by the two types of pile foundations was calculated by simplifying the lining as a circular elastic foundation beam. Finally

the calculated results were compared with that of the geo-centrifuge test. Results show that the theoretical solution results of lining moment are consistent with the test results. This proves the rationality of the presented calculation method. Meanwhile

the tunnel internal force caused by the displacement pile is much larger than that by the non-displacement pile under ultimate load. The maximum internal force position on the tunnel section is directly related to the relative position of the pile end and the tunnel center

and the position is near the cross line of the pile bottom and tunnel center.