摘要
针对古贤重力坝的坝基情况,采用FLAC3D有限差分软件研究了不同工况下重力坝基础处理前后应力分布特征和抗滑稳定安全系数。结果表明,在重力坝下游浇筑盖板可行之有效地增大重力坝抗滑稳定安全系数;随盖板长度(由50 m增至200 m)和厚度(由20 m增至40 m)增加,安全系数增大(由3.5最大增大至4.5),加固效果显著加强。而且,抗剪洞、齿槽与一定尺寸的盖板措施相结合更经济合理。
Aiming at the foundation condition of Guxian Gravity Dam,the stress distribution characteristics and safety factor for the anti-sliding stability of the gravity dam foundation before and after the foundation treatment made on it under different operation conditions are studied herein with the finite difference software—FLAC3 D.The result shows that the safety factor of the anti-sliding stability of the gravity dam can be feasibly and effectively enhanced through placing concrete cover plate on the downstream side of it,from which the safety factor is increased(from 3.5 to the maximum of 4.5)along with the increases of both the length(from 50 m to 200 m)and the thickness((from 20 m to 40 m),thus the reinforcement effect is significantly enhanced.Moreover,combining the cover plate of a certain size with shearing-resistance tunnel and tooth groove is to be more economical and reasonable.
作者
黄畅
HUANG Chang(Institute of Geotechnical Engineering,China Institute of Water Resources and Hydropower Research,Beijing 100048,China)
出处
《水利水电技术》
北大核心
2019年第S1期250-255,共6页
Water Resources and Hydropower Engineering
基金
国家重点研发计划项目(2017YFC1501100)
关键词
高重力坝
深层抗滑稳定
坝基加固措施
敏感性分析
high concrete gravity dam
deep anti-sliding stability
dam foundation reinforcement
sensitivity analysis
