立洲水电站引水隧洞衬砌结构与围岩固结圈联合受力分析  

Joint Stress Analysis of Headrace Tunnel Lining Structure and Surrounding Rock Stereosphere of Lizhou Hydropower Station

作　　者：韩纯杰[1] 贺双喜[1] 赵继勇[1] 王志鹏[1] 杨鹏[1] 祁伟强[1] 

机构地区：[1]中国电建集团贵阳勘测设计研究院有限公司,贵州贵阳550081

出　　处：《红水河》2016年第4期32-36,共5页Hongshui River

摘　　要：立洲水电站引水隧洞长16.7km,地质条件复杂,围岩较差,开挖揭露芋类围岩占总长的16%、郁类围岩洞段占总长的65%、吁类围岩洞段占总长的19%,郁类、吁类围岩所占比例约达84%,承担水头40140m,采用DL/T5195原2004《水工隧洞设计规范》的公式法计算配筋较大.结合现场固结灌浆试验及其检测成果及类似工程经验,根据相关文献资料数据调研,适当提高围岩固结圈物理力学参数,并应用于有限元分析计算.结合引水隧洞衬砌结构力学法配筋成果、有限元法配筋成果,从计算原理及边界条件、工程类比、工程效益、施工因素等方面综合分析,选择适合该工程隧洞的衬砌钢筋型式,考虑-定的安全余度,是符合实际的、合理的.Lizhou Hydropower Station has a 16.7km long headrace tunnel, complex geological conditions and poorsurrounding rocks. The exposed Class III surrounding rock tunnel section accounts for the total length of 16%,Class IV surrounding rock tunnel section for that of 65%, and Class V surrounding rock tunnel section for that of19%. So, the Class IV and V surrounding rocks account for the proportion of about 84% and bear water head of40-140m. Large quantity of reinforcement is required through the formula calculation of DL∕T 5195-2004 ＂Specification for Design of Hydraulic Tunnel＂. Combined with field consolidation grouting test and result, similar engineering experience, as well as relevant data investigation, physical and mechanics parameters of surrounding rockstereosphere are improved properly and applied in the finite element analysis and calculation. Based on the reinforcement results of headrace tunnel lining structural mechanics method and finite element method, comprehensive analysis from calculation principle, boundary condition, engineering analogy, expected benefit, constructionfactors, etc., tunnel lining and reinforcement type suitable to this project are reasonable and practicable whenconsidering a certain safety redundancy.

关 键 词：引水隧洞 衬砌结构 围岩固结圈 联合受力 立洲水电站 

分 类 号：TV222[水利工程—水工结构工程]