Foundation Construction Steps for Corrugated Galvanized Steel Tank

Foundation Construction Steps for Corrugated Galvanized Steel Tank

The foundation construction of the circular corrugated galvanized water tank requires special attention to the flatness and bearing capacity of the foundation to ensure that the pool can be evenly stressed and operate stably for a long time after installation. The following are detailed construction steps:

1. Determine the design requirements

According to the design drawings of the pool, clarify the diameter, height and bearing capacity requirements of the foundation.

Ensure that the soil conditions in the selected area are suitable for building the pool, and avoid weak soil layers or areas prone to collapse.

2. Site cleaning and measurement

Clean the construction site and remove surface vegetation, debris and loose soil.

Use measuring tools (such as level, total station) to determine the center point of the pool, and mark the circular outline of the pool foundation with this as the center of the circle.

Draw the circular boundary line on the ground with lime or other marking materials.

3. Excavate the foundation pit

According to the thickness of the pool bottom plate and backfill requirements, excavate the foundation pit, the depth is usually the thickness of the pool bottom plate plus the thickness of the cushion layer (generally 30-50 cm).

The bottom of the foundation pit should be slightly larger than the outer contour of the pool (it is recommended to exceed the pool diameter by about 50-100 cm) to facilitate construction operations.

If the soil is soft or there is groundwater, precipitation measures or drainage blind ditches need to be taken.

 

4. Leveling and compacting the foundation

Use an excavator or manual labor to level the bottom of the foundation pit to ensure that there are no obvious bumps on the surface.

Use a roller or a flat plate vibrator to compact the bottom of the foundation pit to ensure that the foundation density meets the design requirements (generally requiring a compaction degree of ≥90%).

If the soil has a high moisture content, it can be properly dried or replaced with sand and gravel to increase the bearing capacity.

5. Laying a cushion layer

A cushion layer is laid on the compacted foundation. Commonly used materials include:

Coarse sand or medium sand: about 10-15 cm thick, used to adjust the flatness and provide buffering.

Crushed stone or gravel: about 15-20 cm thick, used to enhance the bearing capacity of the foundation.

Use a scraper or a flat plate vibrator to level and compact the cushion layer.

6. Installing the formwork (optional)

If you need to further ensure the shape and size accuracy of the foundation, you can install a circular formwork on the cushion layer.

The height of the formwork can be set as needed, usually 10-20 cm above the cushion surface.

7. Casting the concrete foundation (depending on the situation)

For larger or heavier pools, it is recommended to cast a layer of concrete foundation on the cushion layer, with a thickness of generally 10-20 cm.

The concrete strength grade is usually C20-C25. When pouring, it should be vibrated and compacted and the surface should be smoothed.

The next step of construction can only be carried out after the concrete foundation is cured.

8. Foundation acceptance

Check the flatness of the foundation and measure it with a level to ensure that the error does not exceed ±5 mm.

Make sure there are no sharp objects or protruding parts on the foundation surface to avoid damaging the bottom of the pool.

9. Backfilling and finishing

If the bottom of the pool needs additional protection, a layer of fine sand or an impermeable membrane can be laid on the foundation surface.

After the installation of the pool is completed, the foundation pit is backfilled and compacted in layers to ensure that the backfill soil is dense and flush with the ground.

Notes

During the construction process of foundation for Corrugated Galvanized Steel Tank, the flatness and bearing capacity of the foundation must be strictly controlled to avoid deformation of the pool due to uneven settlement of the foundation.

If the soil conditions are poor, it is recommended to add foundation reinforcement measures (such as replacement, piling, etc.).

In areas with high groundwater levels, drainage and anti-seepage treatment must be done well.

Corrugated Galvanized Steel Tank