Excavation is an essential phase in many construction projects across several industries. Some of the notable projects that require excavation include foundation construction, canal construction, hydro projects, tunnel work, basement construction, subway construction, laying sewer lines, underground tank construction, and land reclamation projects. However, excavation isn't always straightforward. Ground conditions can make all the difference in the success of your excavation project. For instance, underground water can slow the process and make it more complex. Therefore, you need a drainage solution, and here's where wellpoint dewatering systems come in. Here is everything you need to about them.
What Are They?
A wellpoint dewatering system is a water-removal tool that comprises a series of small-diameter closely spaced wells, often referred to as wellpoints, on the excavation site. The system works through suction or vacuuming, where the underground water on the excavation site is vacuumed, lowering the groundwater level, and creating a dry and stable environment for construction. Usually, the wellpoints are connected to a dewatering pump that discharges the underground water to a predetermined discharge point.
What Are The Different Types?
Wellpoint dewatering systems come in two primary types. They include single-level and multi-level systems. Also referred to as single-stage wellpoint dewatering, this system is designed for dewatering in shallow depths. Usually, only a single row of wellpoints will be enough to get the job done. However, this isn't always the case for deeper excavations. For such applications, you will need multiple dewatering phases. Here's where multi-level or multi-stage dewatering systems come in. As the name implies, the wellpoints are installed in multiple stages at varying elevations until the groundwater is drawn below the subgrade. Since they are more labour-intensive, multi-level dewatering systems are also typically more time consuming and expensive.
What Are The Advantages?
Wellpoint dewatering systems are beneficial in several ways. First, construction can be expensive depending on the scope of the project. Wellpoint dewatering systems are typically more affordable than other dewatering techniques, helping you save money on the project. The technique is also versatile. You can use wellpoint dewatering systems on a wide variety of projects including, water distribution, laying sewer lines, canal construction, bridge construction, residential building construction, etc. In addition, it's suitable for shallow and deeper excavations alike. Moreover, it's a straightforward technique because installation is typically quick.
However, It's worth noting that wellpoint dewatering systems may function better in some soil conditions than others. For instance, silt, clay sands, clean sands, gravel, and stratified soils tend to work well with these systems. However, clay and rock at the subgrade may require predrilling before wellpoint installation.
For more info about wellpoint dewatering systems, contact a local company.