Generally, the dug wells will face the problem of sanding, which should be dredged after a short period of time. The reason for sandblasting of water wells is always one of the intellectual concerns of people who face this problem and are trying to solve their problem in a fundamental way. In this article, we will briefly suggest the reasons for sandblasting the well and solutions to solve it; Stay with us until the end of this text.
what is the well?
What is a deep well? A well is a hole that humans dig in the ground to get water. The water well supplies its water from underground aquifers. A good well is a well that pumps water indefinitely at the lowest cost
what is meant to be sandy?
The walls of a water well are usually covered with steel or plastic pipes. These pipes extend from the surface of the earth to the underground water table and will direct the water to the surface of the earth and prevent the entry of sand particles from the loose soil around the well. Sandblasting is a phenomenon that when drilling and operating a well will lead to the release of fine sand and silty sediments. If this big problem is not given special attention; It may cause quantitative, qualitative, engineering and environmental problems in the water of the desired residential area.
The reason for the sand wells
The presence of sand is one of the signs of reaching water in the well. Sandblasting of wells happens for various reasons that all these factors individually or in combination have a significant effect on the amount of sandblasting of water wells and are directly and indirectly related to it; Among the most important of these reasons, we can point out the issue of the presence of fine grains of sand in different layers of water in the area where people live. In this section, we will mention some of the most important reasons for sandblasting wells:
⚫️Cutting or collapsing of the pipe in the highest part of its mesh
⚫️Incorrect positioning of the installation of the mesh pipe and water pump
⚫️Decreasing the cross-sectional area of water entering the mesh pipe through gas or saw blade
⚫️Increasing The width of the pipe grooves is between 2.5 and 3 mm
⚫️ bridging and using a sand filter in front of the grids
⚫️ lack of full and sufficient development of the well
⚫️ overexploitation of the well size
Solutions to Reduce Wells
Among the factors mentioned in the above section; Each of the items 2, 3 and 4 will have the greatest impact on the sandblasting of water wells in the desired area. Therefore, if the size of the cross-section of the water inlet is suitable and they design grooves in the mesh pipe of standard size to prevent the entry of sand and gravel particles in the water layers of the area; Even if the sand filter is not used, the amount of sand production can be reduced by the natural expansion and development of the well. Also, based on the international standard in America, Japan and Europe, the maximum speed of water entering the well is estimated at 3 centimeters per second, and reducing the speed and movement of water can reduce the amount of sand in the water well in the region. To solve this problem, well dredging can be used, but it is better not to let the work reach this stage by using preventive measures. The use of screen pipes, upvc and equipping well walls with ventilation pipes and caps will prevent the entry of pollution and sand particles into the well water layers of the region.
essential point in the amount of sand
In order to be able to remove about 36 liters of water for 3 cm per second from a plastic pipe with steel mesh with 8 rows of 3 mm grooves, the diameter of the mesh pipe should be about 100 meters. Therefore, if we want to deal with this matter rationally; Generally, such a thickness of water layers in the region is impossible for drilling wells and installing plastic and steel pipes, and the maximum drilled well has a diameter of something between 30 meters. This expansion of the well will increase the speed of the incoming water and bring a large number of sand and gravel particles into the water layers. Aria Technical Services Company is by your side by providing the best pipe opening services.