尼泊尔上塔马克西水电站厂房区岩体水力承载能力测定与分析

Measurements and analysis of bearing water capacity of rock mass of upper tamakoshi hydropower project in Nepal

岩体的水力承载能力是水利工程区域岩体承受高水头作用的能力。应用水力阶撑劈裂试验对尼泊尔上塔马克西水电站厂房区岩体进行了测试,试验工作包括9个测段。结果显示在厂房区左侧围岩岩体抗劈裂能力较高,最大达到10.5MPa,最小为9.2MPa;厂房右侧围岩各测段抗劈裂强度最大值为7MPa,最小6.7MPa;厂房底部围岩抗劈裂强度最大值9.5MPa,最小值为8.6MPa,说明该工程区具有较好的抗渗透能力。测试数据不仅为厂房设计施工提供了准确的依据,也为了解喜马拉雅山南麓地区岩体相关参数提供了参考。

The hydraulic bearing capacity of rock mass is the ability to bear high water pressure in hydraulic engineering filed. The hydraulic jacking test including nine measured sections has been performed in Upper Tamakoshi Hydropower project in Nepal. The results show that the splitting capacity of rock mass at the left plant is higher which could be up to 10.5MPa and the minimum value is 9.2MPa; the splitting capacity of the rock mass at right side varies from 6.7MPa to 7MPa; and that at the bottom of the plant varies from 8.6MPa to 9.5MPa. The results could explain the good water penetration resistance of site rock mass. The test data not only is greatly benefit to the project design and construction, but also provides an important reference to understand the parameters of the rock mass in the south Himalayas.