基于DFA的地下厂房围岩稳定安全评价  

Safety Evaluation of Surrounding Rock Stability of Underground Powerhouse Based on DFA

作　　者：尹彦礼[1] 张建伟[1] 马保宁 李伟 李香瑞 YIN Yanli;ZHANG Jiangwei;MA Baoning;LI Wei;LI Xiangrui(North China University of Water Resources and Electric Power,Zhengzhou 450046,China;Nanyang River Affairs Office,Nanyang 473000,China)

机构地区：[1]华北水利水电大学,河南郑州450046 [2]南阳市河务处,河南南阳473000

出　　处：《人民黄河》2021年第9期129-132,138,共5页Yellow River

基　　金：水工岩石力学教育部重点实验室开放基金项目(RMHSE1902)。

摘　　要：为判断水电站地下厂房围岩的稳定情况,提出一种非趋势波动分析方法(Detrended Fluctuation Analysis,简称DFA),构建判断围岩变形趋势进而判断其稳定性的判据。根据某抽水蓄能电站厂房围岩变形监测数据,将时间序列按周期划分,再利用非趋势波动分析方法从整体和分段两方面判断围岩变形趋势,作为水电站厂房设计规范的辅助判据,分析围岩的稳定性,并与突变理论判断围岩稳定性作对比验证。研究表明:该水电站地下厂房处于稳定状态,方法合理有效,且累积时段的分析结果规律性更强,与匀时段有明显差异,即分析方式对结果存在一定影响。In order to judge the stability of surrounding rock of underground powerhouse of hydropower station, a detrend fluctuation analysis method(DFA) was proposed to construct a criterion to judge the deformation trend of surrounding rock and then to judge its stability. According to the deformation monitoring data of surrounding rock of a pumped storage power station, the time series were divided into periods, and then the deformation trend of surrounding rock displacement time series and rate time series was judged by non trend fluctuation analysis method from the whole and subsection aspects. As the Auxiliary Criterion of Hydropower Station Powerhouse Design Specification, the stability of surrounding rock was analyzed and compared with catastrophe theory. The research result shows that the underground powerhouse of the hydropower station is in a stable state, the method is reasonable and effective, and the analysis results of cumulative period are more regular and there are obvious differences compared with the uniform period, that is, the analysis method has a certain influence on the results.

关 键 词：围岩 稳定 变形趋势 安全评价 

分 类 号：TV731.6[水利工程—水利水电工程]