摘要
本文概要介绍了根据岩溶形态及岩溶形态组合特征,将各种岩溶坝基划分为晶孔溶孔型、溶隙宽缝型、溶沟溶槽型、溶管溶洞型、网状洞穴型、溶带块屑型、间互层洞隙型等七种基本岩溶组合结构工程地质类型及相应的岩体质量分类方法。该方法以定性分类为主,尽可能利用各项地质表征和物性参数进行定量判断评价。实践证明,该方法简便、实用、预见性好,在大中小型工程各勘察阶段均可适用。
For dams situated in karst area, the controlling factors of rock- mass quality and engineering geological condition of dam foundation are mainly the strength of geological base and the karst leakage etc. Therefore, according to karst morphology types and their combining characteristics, karstic dam foundations can be summarised as seven basic engineering geological types with different karst combining structures, including geode- solution pore, gallery - crack of solution fissure, grike- trough, pipe- cavern, cavern- network, mass -clastic and interbedded cavern - fissure types. They are classified as good, fair, moderate, poor and very poor in rock- mass quality separately. For dam foundations with different engineering geological types, there will be various karstic leakage and complexity of rock- mass engineering geological behaviour. This classification is mainly based on qualitative assessment. And geological characteristics and physical - mechanical index are also considered.It has been shown from several water conservancy projects' experience in Hunan Province that this classification is simple, practical, good foresight and can be used to every investigation stage for big, moderate and small hydraulic works to classify the rock-mass quality of dam foundations.
出处
《中国岩溶》
CAS
CSCD
北大核心
1992年第2期105-117,共13页
Carsologica Sinica
关键词
岩溶地区
坝基
岩体
质量
工程地质
Karst morphology type
Combining structural characteristics of karst morphology
Engineering geological type of karst combining structures
Rock-mass classification of dam foundation
Karstic leakage type
