某水电站地下交通隧洞岔洞衬砌结构设计  

Design of Lining Structure for the Bifurcation of an Underground Traffic Tunnel at a Hydropower Station

作　　者：李超[1] 彭睿哲[1] 葛瑶[2] LI Chao;PENG Ruizhe;GE Yao(PowerChina Northwest Engineering Corporation Limited, Xi' an 710065,China;Shaanxi Province Institute of Water Resources and Electric Power Investigation and Design, Xi'an 710001,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,西安710065 [2]陕西省水利电力勘测设计研究院,西安710001

出　　处：《西北水电》2021年第5期74-77,共4页Northwest Hydropower

摘　　要：采用三维有限元法对某水电站地下交通隧洞岔洞几种不同结构设计方案进行数值仿真分析,结果表明:局部加厚衬砌和整体加厚衬砌方案可提高岔洞衬砌结构截面抗弯刚度和整体刚度,岔洞顶拱应力水平低、变形小;岔洞结构顶拱跨中是整体应力及位移最大的关键部位,可通过控制整体衬砌厚度、增加配筋量等方式,调整岔洞应力水平,保证结构安全。The three-dimensional finite element method is used to carry out the numerical simulation analysis on several structural design schemes for the bifurcation of an underground traffic tunnel at a hydropower station.The results show that the local thickened lining and the overall thickened lining scheme can improve the flexural rigidity and overall rigidity of the cross-section of the bifurcated tunnel lining structure.Stress at the top arch of the bifurcated tunnel is low and the deformation is small;the top arch span of the bifurcated tunnel is the key position with the maximum overall stress and displacement.The stress level of the bifurcated tunnel can be adjusted by controlling the overall lining thickness and increasing the amount of reinforcement,hence to ensure the structural safety.

关 键 词：地下交通隧洞 岔洞衬砌结构 有限单元法 

分 类 号：TV554[水利工程—水利水电工程] TV332