Research Summary of Tunnel Excavation Effects on Adjacent Pile Foundation

The existing research results of tunnel excavation effects on adjacent pile foundation were introduced.The comparisons between some test results and theoretical analysis results were conducted,and then the differences of results of tunnelling-induced pile foundation settlement,axial force,lateral deflection,bending moment,as well as pile group effect were discussed.The merits and shortcomings of the existing research were summarized.The analysis results show that all existing research methods have limitations,a general agreement among all the investigations can not yet be obtained.Furthermore,contradictory observations are always found in the study.The research method of centrifuge tests of simulating 3-D tunnel advancement combined with 3-D numerical simulation is development direction in future.