Water well drilling tools are mainly used in the rainy season. Everyone knows that it is not suitable for drilling wells on rainy days. Let's take you to understand that water well drilling tools are not suitable for use in the rainy season.
After the donation is made, it is necessary to pump water to check the results. Under normal circumstances, it is sufficient to do a large-descent pumping, and the water level stability lasts for no less than eight hours. At the same time, the water flow rate of the dynamic water level of the well is measured. For large wells with water at the bottom of the well, the thickness of the filter layer and the particle size of the filter material should be constructed by the design requirements, and the bottom mud and sediment must be removed before the filter layer is laid. The filter material should be sieved to remove mud and measured for use.
The well-drilling project should ensure the smooth drainage of the construction site, so the rainy season should be avoided. When working while digging the soil, the excavation slope should be determined according to the physical and mechanical properties of the soil layer, generally 1:1.5, and there must be a certain distance from the toe of the spoil slope to the top of the excavation. For large wells with water in the well wall, the water inlet holes and filter layer of the well wall must be arranged by the design requirements, and the water inlet holes should be prevented from being blocked during the construction process. The filter material enclosing fill of the aquifer should meet the requirements, the backfill should have a certain super height, and the frozen soil in the backfill in winter should not exceed 15%.