型钢混凝土结构在破碎围岩洞室支护中的应用  

Application of Shaped Steel and Concrete Structure in the Support of Cavity of Broken Surrounding Rock

作　　者：陈小强 陈康亮 Chen Xiaoqiang;Chen Kangliang(Department of Military Facilities Construction of Xining Joint Logistics Center,Joint Logistics Army;College of Water Resource and Hydropower,Sichuan University;State Key Laboratory of Hydraulics and Mountain River Engineering)

机构地区：[1]联勤保障部队西宁联勤保障中心军事设施建设处 [2]四川大学水利水电学院 [3]水力学与山区河流开发保护国家重点实验室

出　　处：《现代矿业》2019年第10期228-231,共4页Modern Mining

摘　　要：以五轮山井田浅埋斜井为工程背景,分析了浅埋强风化洞室围岩变形机理,并将U型钢混凝土组合结构应用于浅埋强风化地下洞室支护设计中,提出了U型钢混凝土组合结构受弯承载力计算方法;同时考虑围岩荷载、卡缆预紧力和支架缩动等3个因素对U型钢可缩性支架内力的影响,对支架内力进行了计算。计算结果表明:U型钢混凝土组合结构可大大减小拱圈的厚度,有效增加地下洞室的净空间。Having the shallow inclined well of Wulun mountain as a engineering background,the deformation mechanism of strong-weathered surrounding rock of shallow cavity was analyzed.The composite structure of U-shaped steel and concrete was applied to the support design of shallow underground cavity of surrounding rock belonging to strong effloresce band.The calculation method of composite structure flexural strength of U-shaped steel and concrete was proposed.The effect of surrounding rock load,pre-tightening force of cable and support yielding on the internal force of U-supports considering yielding was considered simultaneously.Then,the internal force of U-supports considering yielding was calculated.The calculating results indicate that the composite structure of U-shaped steel and concrete can reduce the thickness of arch ring greatly,and increase the clearance of underground cavity effectively.

关 键 词：地下洞室 浅埋 强风化围岩 U型钢混凝土组合结构 支架内力计算 

分 类 号：TU7[建筑科学—建筑技术科学]