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

作　　者：窦国涛 张安静 张明飞 于文杰 王澳波 李梓源 DOU Guotao;ZHANG Anjing;ZHANG Mingfei;YU Wenjie;WANGAobo;LI Ziyuan(School of Civil Engineering and Environment,Zhengzhou University of Aeronautics,Zhengzhou 450046,China;School of Mechanics and Civil Engineering,China University of Mining and Technology,Xuzhou 221116,China;Henan Yellow River Engineering Construction Center,Zhengzhou 450001,China)

机构地区：[1]郑州航空工业管理学院土木与环境学院,河南郑州450046 [2]中国矿业大学力学与土木工程学院,江苏徐州221116 [3]河南黄河河务局工程建设中心,河南郑州450001

出　　处：《辽宁工程技术大学学报（自然科学版）》2024年第3期322-332,共11页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金项目(41902266);河南省科技攻关项目(212102310967,222102320468)。

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。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 

分 类 号：TD228[矿业工程—矿井建设]