SPIDER PLANT PILING TRIALS – PHASE 2
Innovative pairing of spider excavator and side-grip vibratory piling attachment
In 2024, the Rother Tidal Walls East (RTWE) team successfully deployed a Menzi M540 Spider Excavator equipped with an excavator-mounted vibratory (EMV) pile driver.
This approach delivered remarkable results—cutting costs by 65% and reducing carbon emissions by 82%.. However, the setup was limited by the excavator arm’s head height, restricting pile lengths to around 6 metres depending on site conditions.
In a UK-first initiative, VolkerStevin has advanced this method by pairing the Menzi M545 Spider Excavator with a MOVAX SG-40 side-grip vibratory piling attachment and auger. Funded through the Environment Agency’s Net Zero Carbon Innovation Pathway Pilot Fund, the trial aimed to overcome previous pile length limitations and enable installation of longer sheet piles in challenging terrain and restricted access zones.
Trial overview
Conducted over a week in early March 2025, the trial involved driving and extracting various pile types and lengths across diverse site conditions—including virgin ground, pre-augered soil, and steep 1:1 embankments.
Key outcomes
- Enhanced agility and access
The Menzi M545’s spider-like chassis provided exceptional stability and manoeuvrability on uneven terrain. The MOVAX side-grip system enabled precise pile handling and placement in areas inaccessible to conventional rigs. - Optimal working range
The most effective pile driving and extraction occurred within a 4.5–5 metre radius from the slew centre. - Pile performance
U-profile piles (GU16N series) performed reliably, with no structural failures observed. This was attributed to the MOVAX’s centralised clamping and even load distribution.
Conclusion and next steps
This trial marks a significant step forward in sustainable piling for environmentally sensitive and access-restricted sites. The Menzi M545 and MOVAX SG-40 combination offers a scalable, low-carbon solution for flood defence and infrastructure projects across the UK.
Based on these promising results, the team at RTWE are planning to deploy this setup in upcoming works on site, including the installation of 7-metre piles in sensitive scour zones. Further insights will be shared as the method is refined and considered for broader application in future projects.