How to Select the Right Wellpoint Spacing for Your Soil Type with Arabian Equipment in Dubai and Abu Dhabi

Correct wellpoint spacing is one of the most important factors in achieving efficient dewatering on UAE construction sites. Soil type, permeability and groundwater behaviour all influence how close or far apart wellpoints should be installed. When spacing is incorrect, the system may fail to lower the water table, causing delays, safety risks and increased costs.

Arabian Equipment supports contractors in Dubai and Abu Dhabi with expert wellpoint design, accurate spacing recommendations and high-performance equipment. This guide explains how to select the right spacing for your soil type and why proper planning is essential.

Why Wellpoint Spacing Matters

Wellpoint spacing determines how effectively a dewatering system can lower groundwater levels. If wellpoints are too far apart, water remains trapped between them. If they are too close, contractors may waste time and money installing more equipment than necessary.

Correct spacing helps achieve:

• Faster lowering of groundwater

• Dry and stable excavation areas

• Reduced pump load

• Lower operating cost

• Improved site safety

  
  

How Soil Type Affects Wellpoint Spacing

Sandy Soil

Sandy soil has high permeability which allows water to move easily. Wellpoints in sandy soil can be spaced farther apart because groundwater flows quickly towards each point.

Typical spacing: Widely spaced, depending on soil grading and water inflow.

Silty Soil

Silty soil has moderate permeability. It holds more water than sand and drains more slowly.

Typical spacing: Moderate spacing to allow consistent drawdown.

Clay Soil

Clay has very low permeability. Water does not move easily, and wellpoints must be closer together to achieve reliable groundwater control.

Typical spacing: Close spacing to achieve proper drawdown due to restricted water movement.

Mixed or Layered Soil

Many sites in Dubai and Abu Dhabi have mixed layers such as sand over clay or silt mixed with gravel. These conditions require detailed assessment from specialists.

Typical spacing: Varies based on how each layer influences groundwater flow.

Arabian Equipment conducts site evaluations to determine the correct spacing based on real field conditions.

Key Factors That Influence Wellpoint Spacing

1. Excavation Depth

Deeper excavations require more precise spacing to ensure even groundwater drawdown.

2. Groundwater Pressure

Higher groundwater levels require closer spacing to maintain consistent water control.

3. Pumping Rate

Pump capacity must match the spacing design. Wellpoints spaced too far apart may overload pumps.

4. Soil Permeability

The more resistant the soil, the closer the wellpoints must be placed.

5. Site Layout and Obstructions

Structures, utilities or limited excavation space influence where wellpoints can be installed.

How Arabian Equipment Determines Accurate Spacing for Dubai and Abu Dhabi Projects

1. Site Inspection and Soil Data Collection

Arabian Equipment engineers visit the site, assess groundwater levels and review soil test results.

2. Permeability Evaluation

Soil permeability tests help determine the ability of water to flow toward the wellpoints.

3. Calculating Drawdown Requirements

The team calculates how much the groundwater needs to be lowered and selects spacing that achieves uniform drawdown across the excavation.

4. Designing the System Layout

Engineers determine:

• Number of wellpoints

• Distance between each unit

• Pump selection

• Header pipe routing

• Discharge method

5. Adjusting for Real Site Conditions

If soil varies across the site, spacing is adjusted to match each section.

This approach ensures efficient and predictable dewatering throughout Dubai and Abu Dhabi.

Common Spacing Ranges Used in UAE Projects

Sandy areas: Wider spacing due to high permeability silty areas: Medium spacing to ensure stable drawdown clay areas: Tight spacing to overcome low permeability mixed soil: Adjusted spacing based on each layer and inflow rate

These ranges depend heavily on accurate testing, which is why Arabian Equipment provides full design support.

Why Contractors Trust Arabian Equipment for Wellpoint Systems in Dubai and Abu Dhabi

Contractors rely on Arabian Equipment because of:

• Accurate spacing and design calculations

• Detailed soil and site assessments

• Reliable pumps and wellpoint equipment

• Quick mobilisation and installation support

• Continuous monitoring and technical guidance

This ensures wellpoint systems operate efficiently from day one.

Selecting the right wellpoint spacing is essential for safe, dry and stable excavation in Dubai and Abu Dhabi. Soil type, water pressure and excavation depth all determine how the system should be designed. With the expertise of Arabian Equipment, contractors receive accurate spacing plans, dependable equipment and full support throughout the project.