Study On Anti-sliding Stability Of Dam Body Strengthened By Micro Pile Group

The micro-pile and dam combination structure is a new type of support measures,which can effectively control landslide diseases.Although the micro-pile composite structure has been widely used in engineering practice,due to the short history of application and research,people have not fully realized its bearing mechanism and failure mode,and have not formed a mature calculation theory and design method.So far,there have been many researches on the theory of vertical bearing capacity of micro-pile structures at home and abroad,but the research mainly focuses on the field of slope reinforcement.The research on the reinforcement of dams with micro-pile is rarely reported.Therefore,it is of great theoretical and practical significance to study the mechanical mechanism and engineering application of reinforced dams.This project relies on the dam reinforcement project of Shuangma Landfill in Xiangtan City.Based on the relevant research at home and abroad,through the field investigation,design calculation analysis,numerical simulation,and field test,the micro-pile reinforcement concrete dam is stressed.Systematic research on mechanisms and engineering applications,as follows:(1)According to the existing research results on the micro-pile composite structure,the design calculation theory of micro-pile is summarized and improved,and the reinforcement design of the Shuangma garbage dump in Xiangtan City is carried out according to the requirements of the specification.(2)Taking the example of the reinforcement project of the Shuangma landfill garbage dam in Xiangtan City,the numerical simulation analysis of the dam body before and after the micro-pile reinforcement was carried out using Flac3 D numerical simulation software.It was found that the stability of the whole dam body was obvious after the micro-pile reinforcement Improvement.(3)Through long-term on-site monitoring,comparative analysis of the deep horizontal displacement and settlement data of the refuse dam without the micro-pile reinforcement and the garbage dam after the micro-pile reinforcement,it is known that the garbage dam after the micro-pile composite structure is anti-sliding,Anti-overturning stability is clearly enhanced.Through the above research and analysis,it is shown that the garbage dam after the micro-pile reinforcement is more stable than before,and the treatment effect of the landslide disease is more significant,and provides a reference for the future dam reinforcement project.