Study On Vertical Load Bearing Capacity Of High Strength Reinforced Concrete Wall In Shaft

The freezing method is one of the effective methods of coal mine through deep alluvium.In China’s anhui,shandong and henan,such as mining area,the bottom of the deep alluvium aquifer cover directly on coal measure strata,along with the coal mining production,bottom aquifer in hydrophobic consolidation,ground subsidence,and imposed on borehole wall a vertical additional force,caused under the geological conditions of this particular wall widespread destruction.In order to ensure the safe use of wellbore,the vertical bearing capacity of high strength reinforced concrete well wall is studied in this paper.Firstly,by analyzing the vertical stress of the shaft of a high-strength reinforced concrete shaft of a frozen wellbore,a calculation formula for the ultimate ultimate bearing capacity of the wellbore structure is derived based on the concrete strength theory.Then,according to the basic principle of similarity theory,the similarity criterion of borehole wall model was deduced and the model design and production were carried out.The vertical bearing capacity of the high strength reinforced concrete shaft wall structure test,in the process of loading on the deformation and stress of the reinforced concrete were tested,the stress,deformation and bearing capacity of this kind of shaft lining structure characteristics,analyzed the vertical load and the stress and strain,the relationship between the shaft wall structure under vertical load is obtained in the concrete compressive strength increase coefficient,set up the experience formula of the vertical ultimate bearing capacity of this kind of shaft lining structure;Finally,using the finite element software ANSYS to the features of the vertical bearing capacity of the high strength reinforced concrete shaft wall simulation,The vertical stress characteristics of the wellbore of a high-strength reinforced concrete shaft in a frozen wellbore were further analyzed.The results can provide a reference for the analysis of the vertical bearing capacity of the shaft wall.