DEWATERING

 What is dewatering and why dewatering is important? You never know that. But if you are an experience enough you are cleared with this term. But if you are studying in college and not visited any site then you may never know this. But by the way if you are a farmer's son then you might have used this machine. 

Dewatering is necessary if the foundation pit is full of water and no PCC or sand filling can be provided. If the water is present it will lead to the accommodation of water. No work will be done properly and there will be lot of tension. So to empty the water mechanical water pump is used for dewatering. So that the excavation pit remains empty with water and the work can be done easily. 

As the water is poured inside the pump it opens up through the valve. But be careful no air should remain inside or trapped into the machine. Otherwise the machine will give problem. After pouring all the water in the pump, the mouth is kept hold for few seconds of the machine so that no air enters in it. And it is hold until the machine gives starts. The mechanical turbine is rotated with the help of a handle and it gives a blowout pressure as the water comes out. The main thing of using this water pump is to clear out the excavation water.

Moreover in some foundations water remains, but it will longer time to clear out the water. So by keeping little amount of water on the base of the excavation the brick soiling and PCC work is done. But that's not good. Then also what to do because after clearing out the ground water then also it remains same after 1 to 2 hours. Because the water level rises up and up.