一、压力损失计算公式水利水电工程钻孔压水试验的目的,是了解水工建筑物地基与库、坝区渗漏地段岩体的相对透水性,为防渗和地基处理,提供资料。目前,国内压水器有三种,即双管循环式,单管顶压式和单管水压式(也有用气压的)。但常采用的是单管顶压式,如图1。 First, the pressure loss formula The purpose of hydraulic pressure drilling in water conservancy and hydropower project is to understand the relative permeability of the rock mass of the basement and reservoir of the hydraulic structure, seepage area of ​​dam area, to provide information for seepage prevention and foundation treatment. At present, there are three domestic water pressure, that is, double-loop, single-tube pressure and single-tube hydraulic pressure (also useful pressure). But often used is a single tube pressure type, shown in Figure 1.