Well drilling is not suitable when it is raining, but water well drilling rigs are not used in the rainy season. The following editor will come to understand with everyone.

　　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 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 in accordance with 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 sludge 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 digging while working, 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 inflow from the shaft wall, the water inlet holes and filter layer of the shaft wall must be arranged in accordance with 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 position 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%.