论文部分内容阅读
一、机井配套(一)水泵和机井配套水泵的选配需要根据机井深、浅水位的出水量来确定。1.抽水试验。成井的最后一道工序是通过抽水试验来正确评价机井的出水能力和选配适宜的水泵类型及规格。抽水试验一般进行3次水位降落,3次降深值可分别采用1/6、1/4、1/3井内水深。如果提水设备不能满足上述要求,3次降深值也可采用等差级,如2、4、6m等。各次水位降落差值不应小于1m,最小水位降落值也不应小于1m。在砂层中进行抽水试验,3次水位降落,采用由小到大的降深值为宜。在基岩裂缝和砾石层中,可按由大到小的次序进行。抽水试验结束后,绘制抽水降深与出水量关系曲线和抽水降深与单位涌水量关系曲线,根据上
First, the matching wells (A) pump and pump matching wells need to be based on the depth of the machine, the water level to determine the amount of water. Pumping test The last step in a well is to test the water outlet capacity of the well and to select the appropriate type and specification of the pump by pumping tests. Water pumping tests are generally three times the water level drop, three times the depth of the value can be used 1/6, 1/4, 1/3 well depth. If the water lifting equipment can not meet the above requirements, 3 times the depth of decline can also be used such as differential, such as 2,4,6 m and so on. The difference between the water level should not be less than 1m, the minimum water level should not drop less than 1m. Pumping test in the sand layer, three times the water level, using descending depth as appropriate. In bedrock cracks and gravel, according to descending order. After the pumping test is completed, draw the relationship between the pumping depth and the water discharge and the relationship between the pumping depth and the unit water inflow, according to