What are the 4 Different Types of Trenches?

February 15, 2021

In the construction industry, trenches have been providing benefits to different site projects, especially when it comes to buildings and other structures. Trenches have been maximised to effectively lay or obtain access to services and utilities such as power and water. They are also utilised in constructing foundations that can make properties more resistant to sudden ground movements and flooding. Most trenches are dug by excavators or diggers, with dump trucks loading and disposing of the spoil.

Trenches often come as a hollow cut into the ground, making it possible for workers to fulfil their responsibilities. They must, however, be constructed with care to avoid causing serious accidents and property damages. The construction of trenches must also be done efficiently to avoid unnecessary expenses, delays, and other negative effects and results.

To date, there are 4 different types of trenches that are used for the construction industry. These types of trenches are based on the embedment construction and all differ according to the mobilisation, equipment, labour, and embedment material that will be used by the contractor.

Type 1

The standard trench is normally created with the embedment soil compressed in layers to a specific density. This specific type of trench usually needs a lot more time and resources compared to other types of trenches since its haunch support is known to be poor. Haunch is a protrusion of the foundation wall that intends to support structures and piping. 

Type 2

Type 2 trenches are not known by a lot of contractors since they often maximise cohesionless soils that are compacted in one thick layer. The compaction of the soils is normally done through water and internal vibration. Compared to the standard trench, type 2 trenches can easily provide haunch support. They also require less time, labour, and other resources. 

Type 3

Trenches that are part of this type are typically created by dumping the embedment soil in beside the utility lines or pipes. This specific way of creating trenches is normally carried out in a lot of construction projects. However, these trenches are known to provide minimal support for the lines or pipes. Though, type 3 trenches only require little time and labour for the embedment dumping to be completed.

Type 4

One unique trait of type 4 trenches is that they maximise flowable fill as part of their embedment. The use of flowable fill allows these trenches to be done and finished quickly, making them beneficial for projects in urban areas. They can even offer excellent haunch support. But one downside of these trenches that project managers should consider is their overall cost. One cost-saving solution for these trenches is to use on-site mixing of local soils rather than using ready-mix material.

If you need to acquire trenching services, just contact us at Metro Pits. We have a professional approach to service and customer satisfaction that keeps clients coming back for all their underground boring and trenching needs. After all, we aim to get the job done promptly, efficiently, cost-effectively, and safely, making sure that we meet the necessary requirements within a high-risk environment.

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