南水北调与水利科技2017，Vol.15Issue(1)：161-166,6.DOI:10.13476/j.cnki.nsbdqk.2017.01.027
带键槽透水底板上举力特性模型试验研究
Model test on uplift force of pervious floor with a keyway
摘要
Abstract
To protect the downstream river bed and bank slope of the high dam from the serious erosion by high—speed flood flow,which will endanger dam safety,it is necessary to build all kinds of stilling pond protective structures as the first line of defense for dam safety.The security of all types of stilling pond protective structures is the premise for the safety of high dam flood discharge.As the studies on downstream protective works of the high dam dig deeper,floors of different structural forms have been proposed,such as the stilling pond floor with a keyway and the pervious floor,to increase the stability of the stilling pond.The form of the stilling pond also transformed from the "passive protection" model to the "active protection" model.This paper studied the pervious floor with a keyway that combines "active protection" with "passive protection".A model test was conducted to analyze the uplift force in terms of the maximum value,probability density distribution,amplitude,and power spectrum.The results showed:In comparison with the floor with a keyway,increasing permeable holes can reduce the uplift force.The probability density distribution of the uplift force basically conforms to the normal distribution.The magnitude of the uplift force is reduced.The power spectral density is even closer to a low frequency.关键词
水利水电工程/键槽/透水底板/上举力/模型试验Key words
hydraulic and hydroelectric engineering/keyway/pervious floor/uplift force/model test分类
建筑与水利引用本文复制引用
马斌,马永磊,邢仕强..带键槽透水底板上举力特性模型试验研究[J].南水北调与水利科技,2017,15(1):161-166,6.基金项目
国家自然科学基金青年基金项目(51309177) （51309177）
国家科技支撑计划(2011BAB05B05) （2011BAB05B05）
高等学校博士学科点专项科研基金(新教师类)(20120032120051)National Natural Science Foundation of China (51309177) （新教师类）
Key Projects in the National Science & Technology Pillar Program (2011BAB05B05) （2011BAB05B05）
Research Fund for the Doctoral Program of Higher Education of China(20120032120051) （20120032120051）
