矿区采动区框架桥紧邻有限空间土体侧土压力试验研究
Experimental investigation of lateral earth pressure of finite soils adjacent to frame bridges in mining areas
窦国涛 1张安静 2张明飞 3于文杰 3王澳波 3李梓源3
作者信息
- 1. 郑州航空工业管理学院 土木与环境学院,河南 郑州 450046;中国矿业大学 力学与土木工程学院,江苏 徐州 221116
- 2. 河南黄河河务局工程建设中心,河南 郑州 450001
- 3. 郑州航空工业管理学院 土木与环境学院,河南 郑州 450046
- 折叠
摘要
为揭示矿区采动区框架桥侧墙紧邻土体为有限宽度时侧土压力的分布规律,开展了墙体绕墙底转动(RB 模式)下松砂非极限土压力试验.研究结果表明:RB 模式下,加载墙体和被动受压墙体的侧土压力均呈凸曲线分布,且均随墙体深度的增加先增大后减小.墙体深度相同的条件下,侧土压力、侧土压力合力均随相对挤压位移的增大而增大.加载墙体和被动受压墙体的侧土压力三维分布均为凸曲面分布,但是侧土压力极值出现区域不同.在相对挤压位移相同的条件下,加载墙体的侧土压力合力大于受压墙体,侧土压力合力作用点高于受压墙体.
Abstract
In this study,non-limit earth pressure tests were conducted on sandy soil to investigate the distribution of lateral earth pressure adjacent to the sidewalls of a framework bridge in mining areas,using the rotation about the wall base(RB mode)and focusing on finite-width soil bodies.These tests revealed that under the RB mode,lateral earth pressure of the loading wall and the passive compression wall is convex curve distribution,and both increase first and then decrease with the increase of the depth of the wall.Additionally,at any given burial depth,the lateral earth pressures and their resultant forces increase with relative squeezing displacement.The three-dimensional distributions of these pressures form convex surfaces,exhibiting regional variations where maximum pressures occur.Importantly,under comparable conditions of squeezing displacement,the resultant lateral earth pressure on the loaded wall not only exceeds that on the compressed wall but also manifests at a relatively elevated point of action.
关键词
采动区/框架桥/有限土体/RB模式/被动土压力Key words
mining area/frame bridge/finite soil/RB mode/passive earth pressure引用本文复制引用
基金项目
国家自然科学基金项目(41902266)
河南省科技攻关项目(212102310967)
河南省科技攻关项目(222102320468)
出版年
2024
国家科技期刊平台
NSTL
万方数据