供水管井允许出水量的合理确定

Determination Reasonably on Allowa ble Outflow in Tube Well of Water Feed

每一眼管井在井结构确定的条件下,有一个最大允许出水量,而盲目追求增大出水量,势必造成管井涌砂,过滤管腐蚀和堵塞的加剧。松散含水层供水管井允许出水量既要满足地下水允许开采量“宏观”定义要求,从供水管井使用寿命考虑又要满足管井两个流速参数:井壁允许进水流速和滤管允许进水流速。本文给出了管井允许出水量确定方法和计算框图,并以实例说明之,在具体应用时某些细节也予以了说明。

Under the certain conditions of well texture,there is a maximum allowabl e outflow in every tube well.If conce ntrate blindly increase of outflow,may be caused sa nd pour in tube well,and corrosion of filtering tube and jam intensify.The allowable outflow of water feed tube well in loose aquifer is both to satisfy the'macroscopic'definition demand of ground water allowable mining quantity and to satisfy two parameters of current velocity of tube well consider from s ervice life of water feed tube well:a llowable intake current ve-locity of well wall and allowable int ake current velocity of filtering tu te.The paper has submitted determin ate method and count frame map of allowable outflow in tube well,and explain with examples.