可缩式钢管混凝土支架力学性能及经济效益  

Mechanical property and economic effect of contractible concrete filled steel tube support

作　　者：王琦[1,2] 李术才[1] 王汉鹏[1] 李为腾[1] 李智[1] 江贝[3] 张伟杰[1] 

机构地区：[1]山东大学岩土与结构工程研究中心,山东济南250061 [2]山东科技大学土木建筑学院,山东青岛266510 [3]山东科技大学资源与环境工程学院,山东青岛266510

出　　处：《山东大学学报（工学版）》2011年第5期103-107,113,共6页Journal of Shandong University（Engineering Science）

基　　金：国家自然科学基金青年科学基金资助项目(50904043);山东省自然科学基金面上项目(ZR2009FM009);山东大学研究生自主创新基金(YZC10128)

摘　　要：建立了地下工程常用的U型钢支架、格栅钢架、空钢管支架与钢管混凝土支架的有限元模型,分析了各自的承载力、支护效应等力学性能及影响因素。通过研究材料用量和支护效应指标,对经济效益进行了对比分析。进行了钢管混凝土可缩性节点的设计及试验研究,分析了钢管混凝土节点的受力特性。研究表明:钢管混凝土支架支护性能与套箍系数密切相关。与传统支架相比,钢管混凝土支架承载力高,后期强度及延性大,规格多样,经济效益好。配以增阻可缩节点,可实现定量增阻,同时兼具让压功能。在优化分析组合效应的基础上,对钢管混凝土支架进行合理设计,可满足多种深部软岩及节理破碎岩体的支护要求。The finite models of U-steel support, grid steel frame, hollow steel tube support and concrete filled steel tube support were established, of which mechanical properties and influencing factors such as bearing capacity and support effect were analyzed. Comparative analysis of economic benefit was carried out through research of material dosage and support effect index. A contractible joint for concrete filled steel tube was designed, and its mechanical characteristics were analyzed through testing. The results showed that the supporting performance of the concrete filled steel tube support is related to the confinement coefficient. Compared with traditional support, the concrete filled steel tube support has high bearing capacity, intensive later strength, good ductility, various standards and good economic benefits, and in conjunction with the contractible joint, it is able to implement functions of quantitatively increasing resistance and yielding. Properly designed through optimization analysis on associated effects, the concrete filled steel tube support can meet the support demand of deep soft rock and joint broken rock.

关 键 词：钢管混凝土 支架 可缩性节点 受力性能 经济效益 

分 类 号：TD32[矿业工程—矿井建设]