堆石坝垫层料渗透性现场检测的研究
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摘要
垫层料对面板堆石坝的整体渗流有着重要的控制作用,故对其原位渗透检测显得特别重要。现行检测方法存在有检测周期长,试验操作复杂等缺点,文中采用优化的试坑渗水法,通过降低内环特定水位,计算出渗透系数的近似值,方法简单易行。检测数据采用格拉布斯准则进行异常值剔除,并结合试验结果给出了不确定度表示。新方法满足了垫层料填筑过程中的检测时效性和质量控制要求,便于及时处理缺陷,保障工程质量安全。
The bedding material have a great control on the overall infiltration in the face rockfill dam. Therefore,in-situ permeability monitoring is very important. The current detection method has disadvantages such as long detection period and complex test operation. In this paper,the optimized pit seepage water method was adopted,which by means of lowering the specific water level in the inner ring to calculates the approximative value of permeability coefficient. The method is simple and easy to operated. Grubbs criterion was adopted to eliminate the abnormal values. Based on the experiment results,the expression of uncertainty was also presented. The new method can meet the requirement of time limitation and quality control in construction process of filling bedding material,by which the defects can be found and treated in time and project quality and safety can be ensured.
The bedding material have a great control on the overall infiltration in the face rockfill dam. Therefore,in-situ permeability monitoring is very important. The current detection method has disadvantages such as long detection period and complex test operation. In this paper,the optimized pit seepage water method was adopted,which by means of lowering the specific water level in the inner ring to calculates the approximative value of permeability coefficient. The method is simple and easy to operated. Grubbs criterion was adopted to eliminate the abnormal values. Based on the experiment results,the expression of uncertainty was also presented. The new method can meet the requirement of time limitation and quality control in construction process of filling bedding material,by which the defects can be found and treated in time and project quality and safety can be ensured.
引文
[1]帅志兴.原位渗透试验在狮泉河水电站工程中的应用[J].四川水力发电,2005(24):30-31.
[2]陈晓清,崔鹏,陈杰,冯自立,王道杰.云南东川蒋家沟宽级配砾石土原位渗透试验初步研究[J].山地学报,2006,10(24):190-197.
[3]盛树馨,窦宜,等.SL237-1999土工试验规程[S].北京:中国水利水电出版社,1999:4.
[4]刘杰.土石坝渗流控制理论基础及工程经验教训[M].北京:中国水利水电出版社,2005:30-45.
[5]栾艳.土石坝渗透规律与渗漏机理研究[D].重庆:重庆交通大学,2009.
[6]李朝政,张永全,沈蓉.心墙防渗土料原位渗透与室内渗透试验对比研究[J].水利与建筑工程学报,2015,4(13):178-182.
[7]于振凡,丁文兴,等. GB/T 4388-2008数据的统计处理和解释正态样本离群值的判断和处理[S].北京:中国标准出版社,2008.11.
[8]李慎安,施昌彦,刘风. JJF1059-1990测量不确定度评定与表示[S].北京:中国计量出版社,1999.4.
[2]陈晓清,崔鹏,陈杰,冯自立,王道杰.云南东川蒋家沟宽级配砾石土原位渗透试验初步研究[J].山地学报,2006,10(24):190-197.
[3]盛树馨,窦宜,等.SL237-1999土工试验规程[S].北京:中国水利水电出版社,1999:4.
[4]刘杰.土石坝渗流控制理论基础及工程经验教训[M].北京:中国水利水电出版社,2005:30-45.
[5]栾艳.土石坝渗透规律与渗漏机理研究[D].重庆:重庆交通大学,2009.
[6]李朝政,张永全,沈蓉.心墙防渗土料原位渗透与室内渗透试验对比研究[J].水利与建筑工程学报,2015,4(13):178-182.
[7]于振凡,丁文兴,等. GB/T 4388-2008数据的统计处理和解释正态样本离群值的判断和处理[S].北京:中国标准出版社,2008.11.
[8]李慎安,施昌彦,刘风. JJF1059-1990测量不确定度评定与表示[S].北京:中国计量出版社,1999.4.