Tips for Backfilling Trenches and Foundations

When digging trenches or foundations, the process of backfilling is unavoidable. But what is backfilling? Civil contractors Melbourne has today refer to backfilling as the procedure of drawing back the soil to the trench or foundation after excavation. The process should be executed with skills and knowledge according to contract specifications and soil condition.
Civil Contractors Melbourne
The first step to having a proper backfilling process is to engage reliable contractors. For example, reliable civil contractors Melbourne has today can determine the right method of backfilling to use in a given project. The process can take place in several ways, but the main aim is to protect the foundation, landscaping, or underground plumbing or electrical systems.
Different soils have different qualities, which require different construction methods to achieve the intended objectives and performance. During the backfilling process, contractors ensure that they employ minimum interference with the underground pipeline, shafts, and electrical structures. The following methods are important in the backfilling process, executed by reliable excavation companies Melbourne has to offer.
Compaction is an important step in the backfilling process. Reliable service providers such as civil contractors Melbourne firms offer, use special equipment to carry out the process after excavation. You can obtain more information on the details of compaction from websites of excavation companies or Melbourne trenching experts. Overall, the following steps are involved in the compaction process.
  • Backfilling in levels of four or six inches (this is for organic fill that is free of trash)
  • Using a 1000lb compactor machine
  • Watering thoroughly
  • Repeating the procedure
Backfilling with Water Jetting
One method that contractors use is backfilling with the water jet. The process involves the use of a special material to inject water into the trench or foundation. No compaction is involved. In that case, the contractor can simply set the water jetting equipment, leave the site, and just come back later. Experts don’t recommend this method on plastic or heavy clay soils. However, it is suitable for sandy or bedrock soils.
Experts carrying out this method are often careful to place the water-jetting instrument slowly without interfering with the backfill and any underground structure. They also observe EPA guidelines in the process.
Backfilling Using Semi-Liquid Fill
Some experts call it flowable fill. This is a mixture of water and cement in a low ratio, making it a viscous material usually delivered in a ready-mix truck. Excavation experts use the material as a backfill as well. The method requires greater skills and experience in its application. For example, the utility pipe needs to be covered with an aggregate substance before the putting the fill. Since the fill contains cement, it should not cover the utility pipes as this may cause difficulty in the future when hand-digging activities are required.
With the expertise of trenching companies, backfilling methods can be executed effectively to achieve the goals of excavation. In that regard, the support and advice you can get from reliable civil contractors Melbourne firms have today are quite important. Visit for more details.