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抽水蓄能电站导流泄洪隧洞受力特性分析 被引量:1

Analysis of Force Characteristics of Diversion Tunnel in Pumped Storage Power Station
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摘要 以浙江缙云抽水蓄能水电站导流泄洪隧洞为依托,建立应力-渗流耦合水工有压隧洞模型,探究隧洞在施工完建期和运营期间内外水渗流作用对隧洞受力特性的影响,并分析隧洞固结灌浆圈的抗渗性能。结果表明:对于未固结灌浆圆形有压隧洞,隧洞四周围岩均集中出现内水外渗现象,外渗水量及外渗速率均较大,由于内水外渗作用,隧洞周围岩体并未出现明显的应力集中区域,最大拉应力在隧洞洞顶;已进行固结灌浆处理的圆形有压隧洞,由于隧洞灌浆圈起到良好的阻渗效果,隧洞围岩受到的扩张挤压应力减小,隧洞孔隙水压力分布均匀,隧洞整体稳定性得以保证。 Based on the diversion tunnel of Jinyun Pumped Storage Hydropower Station in Zhejiang Province, a stress-seepage coupling hydraulic pressure tunnel model is established to explore the influence of internal and external water seepage on the mechanical characteristics of the tunnel during the construction and operation of the tunnel, and the anti-seepage performance of the consolidation grouting circle of the tunnel is studied. The results show that for the unconsolidated grouting circular pressure tunnel, the surrounding rock around the tunnel is concentrated with the phenomenon of internal water seepage, and the amount of external water seepage and the rate of external water seepage are large. Due to the internal water seepage, there is no obvious stress concentration area in the surrounding rock of the tunnel, and the maximum tensile stress is at the top of the tunnel. For the circular pressure tunnel with consolidation grouting treatment, due to the good impermeability of the tunnel grouting circle, the expansion and extrusion stress of the surrounding rock of the tunnel is reduced, the pore water pressure distribution of the tunnel is uniform, and the overall stability of the tunnel is guaranteed.
作者 乔安文 QIAO Anwen(China Railway 21^(st)Bureau Group 6^(th)Engineering Co.Ltd.,Beijing 101111,China)
出处 《铁道建筑技术》 2023年第2期63-66,共4页 Railway Construction Technology
基金 中铁二十一局集团有限公司科研开发项目(18C-5)。
关键词 抽水蓄能电站 导流泄洪 隧洞 受力特性 pumped storage power station diversion flood discharge tunnel force characteristics
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