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我国许多自流水盆地,压力水头喷出地面数米,直到数十米之多。如水头低于塔(井)架高度时,一般多用接管法观测其稳定静止水位,但当水头高出塔(井)架时,接管法则无法进行。为此,必须采用特制的接头安装压力表观测水头压力值。若水头较高,井内止水又不严格,此时,极易造成承压水沿管壁、孔(井)壁间的环状空间喷出地面,冲毁井口,甚至报废机井,同时,一些生产单位又感到施工上繁杂与不便。所以,有些单位对某些自流水井至今不知其确切稳定的静止水位。它不仅关系到水文地质
Many self-flowing water basin in our country, the pressure head out of the ground a few meters, up to tens of meters. If the water head is lower than the height of the tower (well) frame, it is generally observed by the takeover method for the stable still water level, but the takeover rule can not be performed when the water head is higher than the tower (well) frame. To this end, we must use a special joint installation of pressure gauge to observe the head pressure value. If the water head is high, the water stop inside the well is not strict, at this moment, it is very easy to cause the confined water to spray out the ground along the annular space between the wall of the pipe and the hole (well) wall, to flush the wellhead or even to scrap the machine well. At the same time, The production unit also felt complicated and inconvenient in construction. Therefore, some units still do not know the exact and stable resting water level for some gravity wells. It is not only related to hydrogeology