Numerical Simulation Analysis And Application Of Miniature Steel-concrete Composite Anti-slide Piles

Landslide is a kind of geological disaster which can destroy farmland,roads and buildings,and cause great danger to people’s life and property safety.In order to effectively avoid such disasters,landslide management has always been a more important issue in engineering construction.In order to carry out reasonable and effective management of landslide hazards,this paper takes miniature steel-concrete composite anti-slide piles as the research object to explore the deformation state of landslide under the action of miniature steel-concrete composite anti-slide piles.As a new type of anti-slip support structure,the theoretical study of miniature steel and concrete combination anti-slip pile is relatively rare,which leads to no good theoretical guidance in the practical application of miniature steel-concrete composite anti-slide piles,and most of the data are based on experience,which cannot play a good role in guiding the actual project.In order to solve this problem,this paper adopts a combination of theoretical analysis,numerical analysis and engineering verification method according to the engineering characteristics and force characteristics of steel and concrete,and conducts an in-depth study on the mechanical mechanism of miniature steel-concrete composite anti-slide piles.The main research contents of this paper are as follows.(1)To summarize the research methods and conclusions of existing anti-slip pile reinforced slopes,to outline the advantages of miniature steel-concrete composite anti-slide piles compared with traditional anti-slip piles,and to propose the shortcomings of the current research on miniature steel-concrete composite anti-slide piles.(2)The calculation method of flexural stiffness of miniature steel-concrete composite anti-slide piles is proposed.The form of pile stress and the calculation methods of deformation and internal force of miniature steel-concrete composite anti-slide piles under different combination forms are outlined,and the applicability of anti-slip pile under different combination forms is summarized.(3)Using the controlled variable method,the reinforcement effect of miniature steel-concrete composite anti-slide piles is compared with that of conventional concrete anti-slide pile and miniature steel pipe anti-slide pile,and the optimal pile spacing of miniature pile inside miniature steel-concrete combined anti-slide pile and its own superiority are analyzed and discussed.(4)Under the premise of ensuring safety,the optimal pile spacing and anchorage length of miniature steel-concrete composite anti-slide piles for slope reinforcement are studied,taking into account the two main factors of pile spacing and anchorage length of miniature steel-concrete composite anti-slide piles.(5)Taking the landslide of Lotus Villa in Tangkou Town,Huangshan District,Huangshan City as the background,the strength reduction method was applied to simulate the project,and various reinforcement options were analyzed,and the simulation results were compared with the field monitoring data to judge the effectiveness of miniature steel-concrete composite anti-slide piles when reinforcing the slope.