钻孔高压压水试验在抽水蓄能电站的应用及探讨

Application and Study on Pressure Water Tests with High Pressure in Boreholes of Pumped Storage Power Plant

抽水蓄能电站压力管道、高水头承压洞室等工程由于其水头较高,岩体所承受的压力比较集中,常规压水试验不能准确反映水头压力作用下岩体的渗透等特性,需要进行高压压水试验。笔者在概述了钻孔高压压水试验中设备和技术要求的基础上,结合陕西镇安和新疆阜康抽水蓄能电站工程实践,探讨了钻孔高压压水试验中膨胀介质、止水栓塞等有关问题,并提出了建议。

The pressure water test rather than the conventional pressure water test is required because the later cannot display the permeability of the rockmass under the head pressure as the head of penstock,high-head pressure tunnel,etc of the pumped storage power plant are higher and the pressure acting on the rockmass is concentrated as well. On the basis of description of equipment and technical requirements on the pressure water test with high pressure in borehole as well as in combination with engineering practice in Zhen＇an and Fukang pumped storage power plants,issues related to expansion media,packer,etc in the pressure water tests are explored and suggestions are proposed as well.