The process of removing excess groundwater from soil to allow favorable conditions for construction is known as dewatering. This method has the main objective of lowering the level of groundwater. Proper dewatering methods can lead to concepts like the following: control of groundwater, pre-drainage soil, and the enhancement of the soil’s physical properties.
Dewatering is not new in the construction industry. A number of well-established methods were developed throughout the years to lower the levels of groundwater during the excavation process of constructing a building. Many factors influence the results of dewatering, which include the following: groundwater conditions, type of excavation, and the geology of the area.
How to Plan for a Dewatering Operation
The planning stages of any dewatering operation are perhaps the most crucial out of all the phases of the entire process. There’s a dire need for a comprehensive assessment of any potential environmental impact of the upcoming operation. All possible outcomes should be taken into account as part of the project’s investigation stage. In doing so, professionals in the construction industry can quickly identify issues before these even have the chance to take place. There are plenty of techniques to use to plan for a dewatering operation. For instance, determining the date of the process, its duration, the frequency of dewatering discharge, and the anticipated quality may be an option. Another way of planning for a dewatering operation is to determining the discharged water’s quality, which will include the concentrations of portable contaminants found in natural groundwater.
What are Some Dewatering Methods
Individuals who dwell within the construction industry may want to consider the deep well method of dewatering. Deep wells are a viable option to dewater previous rock and sand formations. This process can also relieve artesian pressure found beneath an excavation. Deep well dewatering techniques are known to be best-suited for removing groundwater from large excavations for the building of dams, locks, tunnels, shafts, and powerhouses. Another method of dewatering is with the use of sumps. A sump dewatering system will involve the digging of a temporary pit. The sump system used for the operation will let pumped water to enter the excavation. Keep in mind that this dewatering method is not to be considered if the groundwater head requires lowering for more than a few feet.
What is the Importance of Dewatering
It’s already clear right from the onset that dewatering does play a major role in ground excavation operations. To carry out a successful dewatering operation, the process requires a relatively dry environment because the water table requires lowering. Furthermore, as the dewatering operation is being carried out, it’ll help in controlling the hydrostatic pressure and seepage. It’ll ultimately mean that it can increase the stability of the foundation soil or excavation slopes to make the ground appropriate for supporting different structures.
Are There Any Consequences for Uncontrolled Dewatering
If there’s an excess of dewatering, then the surplus of discharged water can cause minor flooding. If the area doesn’t require a slight excess of water levels (such as for irrigation), then the discharge can get into bodies of water and storm drains. As a result, it can lead to the clogging of existing drainage facilities, which would then result in flooding during stormy weather. Uncontrolled dewatering operations can even lead to structural collapse, groundwater depletion, and ground subsidence.
Proper dewatering and industrial wastewater treatment methods require the right equipment for the job. Luckily, there are reliable sources in which you can rent such equipment to avoid incidents and consequences before, during, and after the operation.