Research On Seismic Dynamic Response Characteristics And Safety Monitoring Technology Of Anti-slide Micro-pile

In recent years,with the increasing application of micro-pile technology in landslide control projects,the application of micro-pile technology in landslide control has gradually become a hot spot.However,due to the short application history of Micro-piles in landslide control engineering,their understanding is not comprehensive,and the mechanical characteristics,deformation and failure characteristics and safety monitoring design theory of Micro-piles in landslide control under dynamic,especially under seismic action have not been fully studied and understood.Therefore,the supporting characteristics of Micro-piles and safety monitoring design are thoroughly understood.It has important theoretical and engineering significance.Based on the project of National Natural Science Foundation of China(No.41572261),the dynamic interaction between Micro-piles and landslides is studied systematically and systematically in this paper.The research results are compared with those of existing micro-piles.The dynamic response characteristics of soil landslide treated by piles are compared and analyzed.Finally,the safety monitoring and early warning schemes of landslide reinforced by Micro-piles under two kinds of conditions are put forward.In conclusion,the research contents of this paper are as follows:(1)Based on the design scheme of shaking table test for accumulative landslide,the corresponding numerical model is established by using ABAQUS numerical analysis software,and the modeling process is elaborated in detail from the aspects of element division,material constitutive relationship and calculation parameters determination,boundary condition setting,dynamic loading method,etc.(2)Based on the seismic dynamic numerical simulation of prototype landslide model and test landslide model,and combined with the phenomena of shaking table test and data measurement results,the deformation and failure characteristics,displacement changes,internal force distribution law of anti-sliding Micro-piles in accumulative landslide,the development of landslide soil instability and failure,the dynamic response characteristics of acceleration and the stress characteristics of slope surface are studied.In-depth comparative analysis and summary.At the same time,the similarities and differences between the mechanical characteristics and the deformation and failure of the two types of landslides strengthened by Micro-piles are also studied.(3)According to the deformation characteristics,stress laws and landslide instability characteristics of the two types of landslides reinforced by micro-piles,it is proposed that the displacement and deformation of landslides,landslide thrust,internal force and deformation of Micro-piles should be taken as the main control factors for safety monitoring.A remote,all-round and reliable safety monitoring scheme is designed and formulated with monitoring instruments,monitoring contents,monitoring period and monitoring precautions as entry points.