PREDICTION OF GROUT TAKE IN DAM FOUNDATION GROUTING
PREDICTION OF GROUT TAKE IN DAM FOUNDATION GROUTING
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坝基灌浆中灌浆量的预测
DOI：
10.2208/jscej.1990.421_195
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
Isao Shibata
中科院分区：
文献类型：
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作者：
Yasuhisa Hirota;S. Takebayashi;Isao Shibata
大坝基础灌浆一直是大坝基础处理的重要内容之一，但其所需水泥用量的预测一直被认为是一个难题。本文通过对几个规范相似的花岗岩地基大坝灌浆工程的回顾，指出灌浆过程中的吕荣值与单位水泥用量之间存在着良好的相关性，在现场实践中，可通过灌浆前的压水试验获得吕荣值，并以此确定下一步灌浆工程的具体内容。该值表明岩石地基的特性，但被认为与水泥灌浆量无关。然而，本文的研究得出结论，可以从宏观上从初始吕荣值预测灌浆总量。
Although foundation grouting for dams is always performed as one of the most important foundation treatment works, the prediction of necessary cement takes is considered to be difficult. In this paper, several dam grouting projects of granitic rock foundations which have similar specifications have been reviewed, and the results indicate that there exists good correlations between Lugeon value and unit cement takes in grouting procedure.In field practice, Lugeon value is obtained by using the water pressure tests prior to the grout injection, and the value is used for determining the details of further grouting works. The value suggests the properties of rock foundations, but it has been considered to be irrespective of cement grout takes. The study of this paper concludes however, that total amount of grout takes can be predicted from the initial Lugeon value macroscopically.