摘要
文章针对抽水蓄能电站地下厂房洞室规模大、高边墙稳定性突出及软弱夹层影响显著的特点,以某抽水蓄能电站工程为例,采用三维弹塑性有限元方法,研究利用锚洞设置对穿锚索的围岩加固效果。分析结果表明,在厂房顶拱及边墙软岩层布置对穿锚索后,围岩变形量显著减小,拱顶竖直位移、厂房底部竖直位移及边墙水平位移分别减少42.3%、30.8%和49.1%,塑性区范围缩小27.6%~34.6%,说明利用锚洞设置对穿锚索的方案能有效控制软弱夹层引起的围岩变形,提高洞室群整体稳定性。研究成果可为类似地质条件下的大型地下厂房支护设计提供参考。
In view of the characteristics of large scale of underground powerhouse caverns,prominent stability of high sidewalls and significant influence from weak interlayers in pumped storage power station,taking a pumped storage power station project as an example,the 3D elastic-plastic finite element method is used to study the surrounding rock reinforcement effect achieved by setting through-type anchor cables via anchor holes.The analysis results show that the deformation in surrounding rock is significantly reduced after the through-type anchor cables are arranged in the powerhouse roof arch and the sidewall soft rock layers,the vertical displacement in the vault,the vertical displacement at the bottom of the powerhouse and the horizontal displacement in the sidewalls are reduced by 42.3%,30.8%and 49.1%respectively,and the range of plastic zone is reduced by 27.6%-34.6%,demonstrating that the scheme of setting through-type anchor cables via anchor holes can effectively control the deformation in surrounding rock caused by weak interlayer and improve the overall stability of cavern group.The research results can provide reference for the support design of large underground powerhouses under similar geological conditions.
作者
万镇昂
WAN Zhen'ang(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,Hubei,China)
出处
《工程技术研究》
2025年第18期5-7,共3页
Engineering and Technological Research
基金
铁四院科技研究开发计划(KY2023077S)。
关键词
抽水蓄能电站
地下厂房
软弱夹层
锚洞
对穿锚索
pumped storage power station
underground powerhouse
weak interlayer
anchor hole
through-type anchor cable
