Reaserch On The Influence To The Structures Of Ventilation Shafts Or Mefro Station By TBM Construction

Based on observed deep soil longitudinal displacement changing regularity, additional loads situ test and sharing combination concept as well as foundation spread and pile foundation friction theory, this paper discusses additional load and its distribution generated by shield’s advancing to subsurface structures under different methods. And establishes structure-load numerical calculation model according to additional load obtained with the method of foundation spread and pile foundation friction theory, and carries out microscopic study to structures deformation and stress.At the same time carry out site test of stress and deformation to air shaft and station structures under construction supported by Beijing metro line15, thus get changing regularity and effect degree of shield’s advancing to subsurface structures under construction. Put forward judgement criteria for shield’s arrival and reasonable construction that should be adapted in structure design for the first time.