摘要
文中基于某水电站工程,建立了枢纽区、厂房区和坝址区渗流场数值计算模型,对工程枢纽区运行期渗流场开展数值分析,研究运行期工程枢纽区在不同工况下渗流场的分布规律,在此基础上分析不同帷幕布置方案、排水措施失效、防渗帷幕失效、排水孔间距对渗流场的影响。结果表明:排水孔失效后,坝基扬压力明显升高,易导致坝体在建基面处失稳;帷幕失效时,稳定渗流场自由面明显降低,导致主排水孔幕周围的基岩产生的水力坡降过大,由此可见,排水对渗流场的影响较大。
In this paper, based on a hydropower station project, the numerical calculation model of seepage field in the junction area, the workshop area and the dam site area is established, and the numerical analysis of the seepage field in the operation period of the engineering junction area is carried out, and the distribution law of the seepage field in the project junction area under different working conditions is studied. On this basis, the influences of different curtain arrangement schemes, failure of drainage measures, failure of anti-seepage curtain and distance between drainage holes on seepage field are analyzed. The results show that the uplift pressure of the dam foundation increases obviously after the failure of the drainage hole, which easily leads to the instability of the dam body at the foundation surface. When the curtain fails, the free surface of the stable seepage field decreases significantly, resulting in a large hydraulic gradient generated by the bedrock around the main drainage curtain, which shows that drainage has a great influence on the seepage field.
作者
闫世伟
冯熊
Yan Shiwei;Feng Xiong(Lanzhou Resources&Environment VOC-Tech University,Lanzhou,Gansu 730021)
出处
《江西建材》
2022年第8期318-320,共3页
Jiangxi Building Materials
基金
甘肃省高等学校创新基金项目(2021A-251)
甘肃省教育科学规划课题(GS[2021]GHB1813)
兰州资源环境职业技术大学校企协同创新项目(Y2021C-03)。
关键词
渗流场
坝址区
地下厂房洞室群
渗流控制效应
数值分析
Seepage field
Dam site area
Underground workshop caverns group
Seepage control effect
Numerical analysis
