Backgorund:
The following case study examines the issues relating to current hand digging practice and the risks associated & how a mini Vac-Ex system was implemented as a replacement.Our client had previously tried to utilise a HGV Vac-Ex unit but due to busy streets, parked cars and not enough manoeuvring space the trial ceased and traditional methods continued. Following a request to visit the site, it was decided to introduce the T-VAC track unit to reduce the physical footprint onto the busy streets and where possible footpath mount.
Current operational issues encountered:
- Busy streets, minimal parking bay suspensions, unable to stop traffic.
- Frustrating operation that can de-motivate workforce. Awkward working positions.
- One operative would typically excavate a service hole in… 1 hour
- Excavated material placed next to the excavation. Grab wagon continuously repositioning to collect.
Current Heath, safety & occupational health issues:
- Operatives need to sit on footpaths to carefully expose the main in all weathers
- Repetitive manual excavating
- Service strikes
- Operative repetitive strain / HAVS risk
Operational results of the trial:
- No additional TM required & positioned T-VAC track on footpath or in between cars. No customer complaints received
- Operatives response was very positive to the new equipment.
- The operatives could excavate without sitting on the wet & cold footpath.
- A service hole would now typically take …. Between a pair of operatives.
- Material excavated moved to a central position for collection.
- Improved operative retention
H&S and OC results of the trial:
- No sitting on the footpath to excavate.
- Zero HAVS operation
- Reduced repetitive impact on the body
- No service strikes
- Prolongs the working life of operatives
Conclusion
Following the trail, the initial unit was kept on site and an additional 2 units were added to the scheme. The Vac-Ex technique allowed trained but limited experienced operatives to excavate in and around live services without the risk of striking utilities.
