摘要
超深井建设日益增多,传统的地面稳车系统随着建井深度的增加面临有效提升荷载不足的问题。立井环形无中心双层支撑靴结构,利用钢结构与井壁之间的摩擦力提供悬吊荷载,可实现井内悬空砌壁。当前对该支撑靴结构形式及有效悬吊载荷认识不足。通过开展室内相似模型试验,探究双伸缩口支撑靴与单伸缩口形式下撑靴在不同工况下最大悬吊荷重与撑紧力关系。结果表明,双伸缩口支撑靴可以改善其与井壁混凝土的接触状态,其承载能力优于单伸缩口形式;常规脱模工况下,上层撑靴双伸缩口最大悬吊荷重与撑紧力比值介于2.5~2.8之间;涂油不利工况下,上层撑靴双伸缩口最大悬吊荷重与撑紧力比值介于1.9~2.8之间。
With the increase of ultra-deep shafts,the traditional ground vehicle stabilization system is facing the problem of insufficient effective load lifting as the shaft deepens.Using the friction between the steel structure and the shaft to provide a suspended load,the vertical shaft ring-shaped non-centered double-layer gripper structure can be adopted to suspend wall construction in the shaft.In order to better understand the structure and payload of the gripper,indoor model tests are carried out to explore the relationship between the maximum suspended load and the supporting force under different working conditions of the double telescopic gripper and the single telescopic gripper.The results show that the double-retractable gripper can improve its contact with the shaft wall concrete.Under conventional demolding conditions,the ratio of the maximum suspended load to the holding force of the upper double-retractable gripper is within 2.5~2.8.Under oiling conditions,the ratio of the maximum suspended load to the holding force of the double telescopic openings of the upper gripper is within 1.9~2.8.
作者
江军
王博
朱启银
王建州
郝宇航
JIANG Jun;WANG Bo;ZHU Qi-yin;WANG Jian-zhou;HAO Yu-hang(Third Engineering Department of China Coal No.5 Construction Company Limited,Xuzhou 221006,China;State Key Lalwratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology,Xuzhou 221116,China)
出处
《煤炭工程》
北大核心
2022年第4期99-104,共6页
Coal Engineering
基金
国家自然科学基金资助项目(41502271)
中央高校基本科研业务费专项资金资助(2020ZDPYMS08)。
关键词
立井
撑靴
相似模型
悬空砌壁
撑紧力
vertical shaft construction
gripper
similar model
suspended lining
holding force
