What Is Bund Wall Construction?

A bund wall construction is a constructed retaining wall around storage areas, where potentially polluting substances are held. Bund walls (sometimes referred to as dyke walls) are designed to contain any unintended escape from these areas, thus preventing pollution of the surrounding environment. These are often built alongside tanks and containers where the contents of the container could be deemed to be potentially harmful, for example, chemicals or petroleum products.

Essentially, these structures are built to stop these liquids from escaping in the event of a tank or container failure. They are normally constructed around groups of tanks, although single tanks can be bunded if compatibility is achieved and it is possible to build them in the shape of the tank – this can also be more economical.

Guidelines for Constructing Bund Walls: Best Practices

These structures are usually built from concrete, as this is one of the most durable materials available for these purposes. However, there are other construction options available, including welded steel or precast concrete. Precast is a popular choice, as it can be manufactured in a factory and delivered to site ready for construction, which saves a significant amount of time on a project.

For a bund wall to be fit for purpose, it needs to be completely leak-tight. This includes the inclusion of leak tight expansion joints between different casts of concrete and wherever there are penetrations for pipes. In addition, the surface of the bund wall should be maintained crack free and without discontinuities or joint failures that may allow liquid migration. Bunds should also be tested and inspected regularly to ensure they are still fit for purpose. For oil and chemical bunds, Environmental Efficiency can carry out visual assessments using water tankers if necessary, with our team of in-house Chartered Engineers all holding Confined Space Entry certification.