Abstract: Combined with the monitoring data of the deep excavation and surrounding buildings during the construction, the numerical simulation of the H-type double row pile + ground anchor support was performed by using the FLAC3D to verify the validation of the model. Furthermore, the optimization is carried out from the aspects of double row pile row spacing, pile top height difference and pile bottom height difference, and reasonable advice are proposed to provide a reference for the design and construction of the composite support structure.

Key words: Deep Excavation, Deformation Monitoring, FLAC3D, Double Row Pile