摘要
土石坝渗流量测量值受到多种复杂因素的影响而存在一定离散性,这导致基于少量几次渗流量测量值进行比对时,难以获得稳定可靠的比对结果。分别采用浮标法、常规流速仪法和多普勒流速仪法测量王甫洲水利工程围堤排水沟大渗流量,进而统计分析多次渗流量测量值,获得不同渗流量测量方法测量值的概率密度函数,然后类比混凝土抗压强度标准值的定义,基于80%保证率下的测量值进行比对。研究结果表明,相对三测线三测点法测量渗流量来说,一测点一测线法测量的渗流量相对误差最小,修正后的浮标法测量的渗流量相对误差次之,多普勒流速仪法测量的渗流量相对误差最大。基于80%保证率下的流速上限值测量的渗流量同时反映了流速的均值与离散型,得到的不同渗流量测量方法的比对结果更加可靠。
The measured seepage flow of earth and rockfill dam is subject to a certain degree of variability due to the imapct of various complex factors.This makes it difficult to obtain stable and reliable comparison results when comparing based on only a few measurements of seepage flow.The float method,conventional current meter method,and Doppler current meter method were used to measure the large seepage discharge in the drainage ditches of the levees of the Wang-fuzhou Water Conservancy Project.Furthermore,statistical analysis was conducted on multiple measured seepage dis-charge values to obtain the probability density functions of the measured values from different seepage discharge measure-ment methods.Then,by analogy with the definition of the standard value of concrete compressive strength,comparisons were made based on the measured values at the 80%guarantee rate.The results show that compared to the seepage flow measured by the three measurement lines and three measurement points method,the relative error of the seepage flow measured by the one measurement line and one measurement point method is the smallest,followed by the relative error of the seepage flow measured by the corrected float method,and the Doppler current meter method has the largest relative error.The seepage flow measured based on the upper limit of flow velocity at an 80%guarantee rate reflects both the mean and variability of the flow velocity,making the comparison results of different seepage flow measurement methods more reliable.
作者
吴晓亚
黄耀英
颜剑
熊斌
高磊
潘刘明昊
WU Xiao-ya;HUANG Yao-ying;YAN Jian;XIONG Bin;GAO Lei;PAN Liu-ming-hao(College of Hydraulic&Environmental Engineering,China Three Gorges University,Yichang 443002,China;Hubei Hanjiang Wangfuzhou Hydropower Co.,Ltd.,Xiangyang 441000,China)
出处
《水电能源科学》
北大核心
2025年第12期128-132,共5页
Water Resources and Power
基金
国家自然科学基金项目(52239009)。
关键词
比测分析
围堤土石坝
多普勒流速仪法
浮标法
80%保证率
comparative analysis
levee earth-rock dam
Doppler flow meter method
buoy method
80%guarantee rate
