拉洛水利枢纽坝址承压水特征及其对建坝的影响

Characters of confined water in dam-site of Laluo Project and its impact on dam construction

拉洛水利枢纽坝基岩石为板岩,板理裂隙、层间挤压带中赋存脉状裂隙性承压水。经过多年勘察研究,查明了承压水性质、分布及埋藏条件、水位、流量、水力联系,认为其对大坝稳定基本无不利影响,根据地质勘察建议优化了前期地基处理方案设计,减少了大量工程量。

The rock foundation of Laluo Dam is formed by slate that has fractures and vein-type fissure confined water in interlayer extrusion zone. After years of reconnaissance and study, the nature of confined water as well as its distribution and buried condition, water level, flow and hydraulic connection has identified. The rock foundation has no negative impact on the stability of dam. The design of foundation treatment in the early stage was optimized in accordance with information obtained from geological investigation which resulted in a dramatic reduction of quantity of construction work.