Analysis of Deep Foundation Pit Pile-Anchor Supporting System Based on FLAC3D

Relying on a deep foundation pit project in Beijing, using FLAC3D three-dimensional finite-difference software simulation combined with displacement monitoring data verification method, the excavation and three-pile two-anchor rod support system anhydrous sand pebble stratum are systematically analyzed, summed up variation law of formation stress, internal force soil nail, axial bolt, stress pile process pit. The results show that during pit, maximum horizontal sidewall is not at top slope but certain distance below pile. anchor unevenly distributed along length direction, free section equal, anchoring decreases turn, prestress spreads to after tensioning locking. soil-nailed wall passive force-bearing system, small process, distribution direction large middle two ends. By analyzing deformation, timeliness construction improved, an effective reasonable case reference provided for informatization simulated relevant working conditions.