مطالعه ي نحوه ي تعيين و تأثير فشار جبهه كار ماشين هاي حفر تونل بر تغيير شكل هاي سطح زمين

FACE PRESSURE IMPACT OF EPB SHIELD TUUNELLING ON SURFACE SETTLEMENT AND GROUND HEAVING

Before underground excavation, appiopriate information is available to determine construction requirements and maintanance systems. However, this sort of information is not enough and the excavation is likely to encounter unpredictable damage. Resulted damage may inflict ir­reparable losses on installation and residential zone;, in addition to disturbances in the exploitation systems. So, examining different, parts and, Especifically, controlling states of stress and deformation will considerably pre­vent disasters. Different methods of determining face pressure are evaluated. Plaxis-3D software is applied to measure the face pressure and the resulted settlement and heave on the ground surface are discussed in this paper. For this purpose, the Es fall an subway informa­tion is used as a case study