Design Method Of Slope Reinforced With Micro-piles Group Against Landslide Based On BIM Technology

In recent years,a new type of slope(landslide)reinforcement technology-micropiles(groups)has been used in slope projects.However,there is a lack of understanding of the stress mode and calculation method of this new type of anti-slide structure,especially the lack of an efficient design platform integrating modeling,calculation and data conversion.It is specially used for the calculation and design of slope or landslide reinforced by micro-piles(groups),so there is an urgent need to carry out in-depth research and development.In order to meet the needs of prevention and control of major engineering geological disasters in our country,it has important engineering application value to carry out the research on the stress mode of new anti-slide structure and the design method of micro-piles group reinforcement slope based on BIM(Building Information Modeling)technology which is popularized by our country.In this paper,based on the internal force calculation method of the micro-piles group,the second development of Revit is carried out,and the rapid modeling of the micro-piles group and the real slope is realized on the BIM platform,and the BIM model of slope engineering is connected with the finite element numerical simulation to realize the optimal design of anti-slide structure.The main work of the thesis is as follows:(1)Regarding the problem of strengthening landslides by micro-piles group,based on the assumption of internal force calculation and analysis,the spatial structure is simplified into a plane rigid frame,and the structure is divided into a load section and an anchor section at the sliding surface.The simultaneous two-part calculation equation can obtain the internal force and displacement of the micro-piles structure at the sliding surface,and then calculate the internal force of the entire pile body at any position;(2)Using the application program interface(API)provided by Revit,to develop the rapid modeling plug-in of the micro-piles group,to realize the custom modeling of the micro-piles group on the BIM platform,and integrate the internal force calculation theory into the design Plug-in,which assigns the mechanical parameters of BIM model to provide reference for engineering design;(3)Revit compiles external commands for spatial surface modeling through the secondary development of Revit to realize the modeling of slopes with complex strata interface based on real geological profile data;(4)ACIS(.STA)file is used as a transfer file to realize the conversion of BIM model to finite element calculation model.Based on the case of K51 high-speed cutting slope treatment on Guangyuan-Bazhong Expressway,the slope with complex interface was modeled on the BIM platform to complete the BIM model configuration design of the micro-piles group,and the numerical simulation analysis was carried out.The rationality of the slope reinforcement design scheme was verified,and the results of the secondary development were verified.