In Staffordshire a crucial infrastructure project required the installation of a temporary bridge over a river to facilitate the construction of a £7.5 million water treatment facility. The temporary bridge, spanning 5 meters wide and 15 meters long, was essential for allowing construction equipment, including a 100-ton lift capacity crane, to traverse the river and access the construction site. Due to site constraints, including a 3-ton weight restriction on one side of the river, traditional foundation methods were impractical. Therefore, the project required an innovative and efficient solution to establish stable foundations for the temporary bridge.

Challenges Faced:

  1. Site Constraints: Access to one side of the river was limited to vehicles weighing no more than 3 tons, posing a significant challenge for conventional foundation installation methods.
  2. Temporary Structure: The bridge was intended as a temporary solution for the duration of the construction project, necessitating a foundation system that could be easily removed once the project was completed.
  3. Load Requirements: The bridge needed to support heavy construction equipment, including a 100-ton crane, as well as accommodate horizontal vehicle braking loads, requiring robust and stable foundation support.

Solution Implemented:

To address the challenges presented by the project, Ground Sun Piling proposed the use of 48 AB Chance Helical Screw Piles for the foundation of the temporary bridge. This solution offered several advantages:

  1. High Load Capacity: The helical screw piles provided a high load-bearing capacity, capable of supporting heavy construction equipment and accommodating horizontal vehicle braking loads.
  2. Ease of Installation: Utilizing a 3-ton excavator, the helical screw piles could be installed without the need for a piling mat, streamlining the installation process and minimizing site disruption.
  3. Adaptability: The screw piles were installed at both 15-degree and 45-degree rakes to accommodate the specific load requirements and ensure stability under varying conditions.
  4. Temporary Solution: Designed as a temporary structure, the helical screw piles offered the flexibility to be easily removed once the construction of the water treatment facility was completed, minimizing environmental impact and site remediation efforts.

Ground Sun Piling will return after approximately 9 months to remove the helical screw piles, as the temporary bridge serves its purpose and the construction project reaches completion. This demonstrates the adaptability and sustainability of helical screw pile foundations, offering a cost-effective and environmentally conscious solution for temporary infrastructure projects.