Study On Horizontal Reinforcement Treatment Of Concealed Hole Area Collapse Early Warning Method

Subsidence of concealed hole under the roadbed is a common geological disasters, sudden collapse is a great threat to traffic, that must be properly treated. Concealed hole area roadbed commonly use soil reinforcement, cross and other methods to deal. Due to the complexity of hydrological, geological conditions, the hole after the treatment may continue to develop and lead to sudden collapse again. In this case, since can’t completely avoid failures happen again, early warning has practical significance for this kind of collapse. Horizontal reinforcement method is a way of treating concealed hole which emerges in recent years. It has early warning function, and had applicated abroad, but early warning methods about horizontal reinforcement treatment of concealed hole is lack of research.Based on the study of the reinforcement treatment method by the indoor model and the numerical experiments of concealed hole area, the vehicle vibration was studied in horizontal reinforced road collapse after the treatment method for early warning, the mainly following work was finished:(1) In view of the existing research in the analysis of the characteristics of ground deformation caused by subsidence is relatively little, and the indoor model test research is not convenient to study the influence of the numerous variables on the surface deformation, more cannot be analyzed characteristic of ground surface deformation. Firstly, horizontal geotextile is studied through the indoor model test maximum vertical deformation, surface subsidence value changing with the thickness of roadbed, and compared with FLAC3 D numerical simulation, the results verify the feasibility of the numerical analysis method. On the basis of above, the horizontal reinforcement treatment of concealed hole is studied in the process of subsidence caused by surface deformation and rule.(2) Aiming at the shortcomings of the existing failures early warning method. It is proposed based on the road-collapse early warning model of vehicle vibration analysis. In order to establish the model, firstly analyze the different causes of uneven road table geometry model, then set up the seven degrees of freedom vehicle vibration analysis model and dynamic equations of motion of vehicle,analysis steps of the equation was deduced.(3) In order to implement the roadbed subsidence early warning method based on vehicle vibration analysis, established concealed void area horizontal reinforcement treatment of subgrade numerical model and analysis of the model parameters, analysis of vehicle vibration caused by collapse by MATLAB programming, and compare with other causes of vehicle vibration analysis; combined with roadbed numerical model analysis parameter,research the influence factors of the deformation of subgrade surface to vehicle vibration,get the early warning method applicable scope of vehicle vibration failures.