基于双向板理论充填挡墙配筋力学模型

Mechanical model of filling blocking wall reinforcement based on two-way slab theory

基于混凝土结构双向板理论,建立钢混充填挡墙配筋力学模型,并推导出充填挡墙配筋数量与充填体强度及充填挡墙厚度的关系式。以金川二矿区为工程分析实例,采用控制变量法(CVM)研究充填体强度和充填挡墙厚度与充填挡墙配筋数量的变化规律。研究结果表明:在充填挡墙尺寸一定的前提下,充填挡墙的厚度随着充填体强度的增大呈线性增大;当充填挡墙尺寸和充填体强度一定的前提下,充填挡墙的配筋数量与充填挡墙的厚度呈二项式相关,当充填挡墙尺寸和充填挡墙厚度一定的前提下,充填挡墙的配筋数量与充填体强度呈线性相关。最终得到充填体强度与充填挡墙配筋数量的理论关系式。

Based on the “two-way slab” theory of concrete structure, the reinforcement of the filling blocking wallmechanical model was established, and the formula of amount of the filling blocking wall reinforcement with backfillstrength and filling blocking wall thickness was elicited. Taking Jinchuan second mine as an example for engineeringanalysis, the rule of backfill strength and filling blocking wall thickness changing with the amount of filling blocking wallreinforcement by control variate method （CVM） was studied. The results show that, on the premise of certain size offilling blocking wall, the filling blocking wall thickness increases linearly with the increasing of strength of backfill; onthe premise of certain size of filling blocking wall and the strength of backfill, there is a negative correlation between theamount of filling blocking wall reinforcement and the thickness of filling blocking wall; on the premise of certain size offilling blocking wall and the thickness of filling blocking wall, there is a positive correlation between the amount offilling blocking wall reinforcement and the strength of backfill. The final theoretical equation among the strength ofbackfill and the amount of filling blocking wall reinforcement was obtained.