Abstract: The general behavior of sludge from 8 dam-sites is studied, which are located in southern part of China. On the basis of investigation in situ and sampling, it may be classified into two types. One is common with relatively wide distribution, of which the content of SiO2 and Al2O3 is quite low, i.e. < 10%, although the different sludge in color has different major chemical component. The other is special with unusual distribution, where its outcrop has good in correspondence with geological deficiency bodies, such as sandwich, fault zone and others. Furthermore, the content of SiO2 and Al2O3 is relatively high, i.e. < 30%. From these, it is believed that the latter type may produce a relatively obvious influence on seepage stability. Therefore, it is necessary to keep monitoring its tendency.

摘要： 本文以我国南方8座水电站为例,综合论述了大坝坝址析出物的基本特征。根据现场调查以及取样分析化验的结果，认为可以将其分为两类:一类为一般类型的析出物，另一类则为特殊类型的析出物。前一类分布较普遍，虽不同颜色者具不同的主化学成分，但硅、铝含量均较低,即低于10%；后一类中硅、铝含量却比较高，即高于30%，且其出露位置与基础地质薄弱体的位置之间具有较好的一致性。因而认为，后一类析出物较之前者对于岩体的渗透稳定性具有相对明显的影响，应加强跟踪监测。?