摘要
坝料渗透特性是土石坝渗流计算分析的重要参数。土石坝采用当地材料进行筑坝,是"就地取材"较为经济坝型,筑坝材料的性能决定坝型的选择与确定,挡水建筑物的关键是防渗,筑坝材料的渗透性是决定坝型选择的关键和主要因素之一。通过对当地材料粉土质砂掺入一定量的泥岩以提高粉土质砂的防渗性能,解决粉土质砂渗透系数大而不能满足规范对筑坝材料的要求的问题。对不同泥岩掺量的粉土质砂进行渗透系数的试验研究,确定了最佳泥岩掺量。
The permeability of dam material is an important factor for the seepage calculation of earth-rock dam. The earth-rock dam is an economic dam type constructed with the local materials, which could decide the selection and definition for dam types. The key of water retaining structure is seepage control, so the permeability of dam-building material is the key and one of main factors which could decide the selection for dam types. Through admixing the mudstone for a certain quantity into the local silty sand to increase its permeability, the problem could be solved that the permeability coefficient of the silty sand is great not to meet the requirments for dam-building material in standard. The optimum mudstone admixture quantity is determined here through the experimental study on the permeability coefficient of the silty sand under different mudstone admixture quantity.
出处
《水利与建筑工程学报》
2011年第6期139-140,154,共3页
Journal of Water Resources and Architectural Engineering
关键词
土石坝
粉土质砂
泥岩掺量
渗透系数
earth-rock dam
sitty sand
mudstone admixture quantity
permeability coefficient
