一、引言在水利水电工程的地质勘测中,为研究岩体的透水性,往往需要进行压水测试。实践表明,对于诸如承压输水隧洞、深埋地下厂房、水库大坝等工程的地质勘测,岩体透水率的原地测试具有极为重要的意义。除此之外,岩体的透水性亦与地下水的运动及水库诱发地震密切相关,而且地下水的运动对于断层活动也起着重要作用。因此,研究工程区岩体的透水性不仅对防渗设计,而且对水库诱发地震及工程区的稳定性评价也是至关重要的。 I. INTRODUCTION In the geological survey of water conservancy and hydropower projects, in order to study the permeability of rock mass, it is often necessary to carry out the water pressure test. Practice shows that for geological surveys such as confined water conveyance tunnels, deep underground powerhouse, reservoir dams and other projects, in situ testing of rock mass permeability is of great significance. In addition, the permeability of rock mass is also closely related to groundwater movement and reservoir induced earthquake, and groundwater movement also plays an important role in fault activity. Therefore, studying the permeability of the rock mass in the engineering area is not only important for seepage prevention design, but also for the evaluation of the stability of reservoir-induced earthquake and engineering area.