水利水电科技进展2012，Vol.32Issue(6)：50-55,6.DOI:10.3880/j.issn.1006-7647.2012.06.013
大化水电站溢流坝段水平位移异常原因分析
Analysis of horizontal displacement abnormity for overflow dam of Dahua Hydroelectric Power Plant
沈慧 1王志远 1黄武春2
作者信息
- 1. 国网电力科学研究院,江苏南京210003
- 2. 广西桂冠大化水力发电总厂,广西河池530800
- 折叠
摘要
Abstract
With regard to the abnormal phenomenon that the observed data of Dahua Hydroelectric Power Plant show that the horizontal displacement of overflow dam is toward the downstream in summer and autumn, while the concrete dams generally have the contrary variation rules owing to temperature rise, through the FEM calculations and the in-depth comparison of observed data, the special deformation rules of overflow dam of Dahua Hydroelectric Power Plant are true and reliable. This phenomenon is reflected by the geological conditions of dam foundation and the operation modes of hydropower station. The causes for the abnormal phenomenon are as follows: the fluctuating range of the upstream water level of Dahua Hydroelectric Power Plant is small, while that of the downstream one is quite large; during the flood period, the vertical component of the downstream water pressure acts on the overflow dam surface and the apron, it will cause the dam foundation to turn towards the downstream direction under the combined action of the upstream water pressure, resulting in that the crest of the overflow dam goes towards the downstream in summer. The FEM calculations show that the deformation modulus of the dam foundation is low, and the impact of geological defects on the deformation is validated to some extent.关键词
溢流坝段/安全监测/水平位移/下游水位/大化水电站Key words
overflow dam/safety monitoring/horizontal displacement/downstream water level/Dahua Hydroelectric Power Plant分类
建筑与水利引用本文复制引用
沈慧,王志远,黄武春..大化水电站溢流坝段水平位移异常原因分析[J].水利水电科技进展,2012,32(6):50-55,6.
