What You Need to Know About Construction Dewatering

Large pipes on a construction siteConstruction dewatering is a common operation in civil engineering. While it may sound like a simple process, it entails the right planning and equipment to ensure the safety and strong foundation of the environment. Those in the civil construction field such as Toolkwip Pumps know more about dewatering’s importance, techniques, and how to do it responsibly.

What is Construction Dewatering?

Construction dewatering is the act of discarding ground or surface water from the site. Commonly, it is done before excavation and involves an arduous process of storing, pumping, treating and releasing water.

Importance of Construction Dewatering

Construction dewatering is necessary to maintain safety in the workplace. It minimises the risk of excess water damaging the structure, or posing a threat to the labour force.

Moreover, dewatering prevents leakage and displacement in the site. It also helps in making sure the project can be completed as scheduled.

Dewatering Techniques

There are two dewatering techniques commonly used are water pumping and gravity drain.

In water pumping, submersible pumps such as puddle suckers are used to extract water and use a discharge hosepipe to transfer the water to a drainage system. Puddle suckers are also distinguished for their ability to drain water down to as low as 1mm.

A gravity drain makes use of drainage channels to transport water to a discharge point.

Dewatering Precautions

Dewatering may be regarded as a simple process. However, it requires thorough planning to ensure it does not cause erosion on the site, it does not pose a risk to people, and the extracted water is stored or transported in a safe place.

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For optimum safety, here’s a list of precautions to keep in mind:

1. Be fully aware and knowledgeable of the site’s water table conditions, since it will be one of the bases of your plan.

2. Do not pump water directly into higher-elevated areas such as slopes.

3, Stop the dewatering process if signs of erosion and ground instability start to emerge.

4. Create safe and stable discharge channels.

5. Do not extract oil- or chemical-contaminated water.  Instead, utilise an oil-water separator.

6. Finally, don’t forget to secure necessary permits and licenses from your local government agency. These documents are proof that you are allowed to proceed with your dewatering operations.

Keeping this guide in mind, you are always equipped with the knowledge you need for a proper and responsible construction dewatering.

For efficient and high-quality puddle suckers/submersible pumps, contact us. We can also supply filtration and flow meters for your construction, industrial and mining operations.