Large Underground Water Tank Project Installation | HDG Water Tank

Integrated Underground Water Tank and Pump Room Design

This underground water tank project features an integrated pump room design. The project consists of a 21 × 16 × 3 m water tank and a 16 × 7 × 3 m pump room.

The main tank is divided into two independent storage compartments, each measuring 21 × 8 × 3 m. The tank was assembled using 3 × 1 m hot-dip galvanized steel panels, providing high assembly efficiency and a relatively short construction period.

The modular structure provides sufficient structural strength and corrosion resistance to meet the design requirements of the water storage project.

What Is the Difference Between Underground and Above-Ground Water Tanks?

You may wonder what makes an underground water tank different from a conventional above-ground water tank.

First, in terms of panel thickness and material selection, underground water tank panels generally need to be thicker because they must withstand the external pressure and loads generated by the surrounding soil. Panels with thicknesses of 3.5 mm or 4.0 mm are commonly used.

After installation, a layer of bituminous coating is applied to the exterior of the tank to provide additional protection against moisture, corrosion, and abrasion.

Second, the tank structure and internal accessories need to withstand not only the water pressure inside the tank but also the external pressure exerted by the surrounding soil. Therefore, the internal tie rods and support members of an underground tank generally require higher strength than those used in above-ground tanks.

For this type of project, 48 × 3.0 mm steel pipes and reinforced fastening components are commonly used. For projects with higher structural requirements, additional diagonal bracing may also be installed.

Finally, an underground water tank height of around 3 m is generally recommended. This depth can provide sufficient storage capacity while helping to balance the additional lateral pressure caused by the surrounding soil.

Maximizing Above-Ground Land Utilization

One notable feature of this project is that the water tank, pump room, and water treatment equipment are all located underground. This design significantly improves the utilization of the above-ground space and leaves more usable land for other purposes.

If you are considering an underground modular water tank project, this project can serve as a useful reference. We are also happy to discuss your project requirements and explore a suitable tank design with you.