Dewatering refers to removing groundwater or surface water from a construction site. Dewatering is usually accomplished through pumping or evaporation, and It’s performed by hydrovac services using hydrovac trucks. Lowering the water table might pose problems throughout the excavation process due to the stored water in excavations and trenches. Accumulated water can also find in areas with a low water table or an insufficient slope. This gathered water needs to remove by hydrovac services to preserve worker safety. It’s critical to have a good construction dewatering plan in place if you want to stay on budget and schedule.
While dewatering a construction site is expensive and time-consuming, removing and reducing groundwater is vital. Emergency flood water removal from construction sites is essential. A well-prepared dewatering strategy is necessary as it may prove compliance with Best Management Practices.
What Are the Benefits of Dewatering for Your Construction Project?
Dewatering is vital in construction because it keeps excavations stable and dry by boosting soil stability and assuring worker and equipment safety.
Here are a few reasons why dewatering construction sites is essential:
- Protection of the environment.
Standing water attracts mosquitos and other pests, posing a health danger. Additionally, garbage and pollutants can build in water. Dewatering processes aid in the removal of contaminated water and toxins as well as the reduction of insect and mosquito-related health dangers. It also aids in compliance with environmental standards.
- Merge the Soil.
The earth dries out as subsurface and surface water depletes. The landscape stabilizes by dry soil. Which reduces the possibility of silt to wash away by water makes for construction and hydrovac services.
- Providing a Risk-Free Workplace.
Working circumstances with groundwater and surface water are hazardous. Construction equipment can be hampers or damaged by water. Wet or muddy terrain can be a tripping hazard for workers as well as obstructing specific operations.
What are the Different Dewatering Methods for a Construction Site?
The various dewatering methods are not interchangeable. Each approach has a specific use. As a result, choosing the right direction is crucial. In the building industry, there are four basic dewatering processes.
- Deep Wellpoint
Boreholes with submersible pumps are used in deep wellpoint methods to drop the groundwater level below the excavation level. Wells with diameters of 15 to 20 cm bores around the excavated area. It is done by lowering the water table and depleting the groundwater.
- Wellpoint Method
A succession of wells is positioned along the excavated area in the wellpoint method. The well-points are linked to riser pipes, which connect to a standard header pipe and vacuum pump. Water releases away from the site after treatment. Many stages of well-points need a deeper decline.
- Eductor Wells
The wellpoint approach is comparable to the eductor well method. Eductor wells pull water from the wellpoint by using high-pressure water rather than a vacuum. With this technology, the water table will reduce to a depth of 10 to 45 meters. Several pumps will operate from a single station. The eductor well method is appropriate when the ground has poor permeability materials.
- Sump Pumps
Because it works by gravity, sump pumping is the most popular method for dewatering. This is also the most cost-effective way. It allows groundwater to leak into the excavation area, where it will collect in sumps and pump away. This procedure will use in shallow excavation regions with a lot of sand or gravel in the soil. If the excavation area is extensive, a ditch – a long, narrow sump along with the excavation – can use.
Hydrovac services must address dewatering, particularly during the excavation and foundation stages. Groundwater that is not regulated can flood excavated areas—causing damage to construction materials and equipment and needing emergency flood water removal. Water can also cause trench collapses and floods, posing a risk to the area’s construction workers. Before beginning groundwork, it’s critical to choose an appropriate dewatering process, usually offered by hydrovac services. The approach provided will Depend upon soil conditions and the water table. Dewatering can aid in preparing the ideal conditions for building foundations, worker safety, productivity, and environmental impact.