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Drillhole high-pressure packer permeability test for underground powerhouse in Pushihe pumped storage hydro-plant
Authors:TIAN Zuoyin  CHEN Li  REN Xiangyu  LI Zhanjun
Institution:1. Institute of Northeast Hydroelectric Investigation Design, Changchun 130000, China
2. College of Construction Engineering, Jilin University, Changchun 130026, China
Abstract:Usually the water head of the pumped storage hydro-plant is high, generally up to 400-500 m, therefore the rock mass under the high-pressure bifurcation pipe have to bear as high as millions Pascal water pressure, in according with the requirements of high water head pumped storage hydro-plant should be 1.2 times of the water head special high-pressure packer permeability test compared with normal to test the permeability of rock and rock cleavage pressure value. The test results on the choice of design options often play a decisive role. Based on the engineering practice, the authors studied the drillhole high-pressure packer permeability test in the pumped storage hydro-plant's underground powerhouse, by the analysis of test results, this article offers a demonstration of the deformation of rock fracture witch under building in the condition of high-pressure water head, it provides a more detailed engineering geological background.
Keywords:pumped storage  high-pressure packer permeability test  rock mass  deformation  permeability  rock cleavage
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