New entry haven in The Hague
The council of The Hague commissioned Van Halteren Infra with a project for a new entry haven. For this haven new sheet piles needed to be driven into the ground. Since the goal of zero-emission construction sites is one shared by many construction companies, Van Halteren Infra made the decision to try out an electric machine for this project. Therefore, the emissions are reduced and with smart electric machines the energy consumption could be reduced as well. With this new innovation the zero-emission construction site is one step closer.
Innovative electric vibratory hammer powered by a battery
To ensure that the sheet piling could be done with an electric machine, eQuip in the name of their daughter company EFE Technology developed an electric vibratory hammer. They removed the hydraulic motors of the traditional vibratory hammer used for sheet piling and replaced them with small but powerful electric motors specifically made to withstand vibrations. With the new development of a specified algorithm, they achieved a hammer, which is around 40% more efficient than its traditional counterpart. This new hammer can produce 2,300 vibrations per minute with an impact force of 100 tonnes. However, this electric hammer requires higher power than what the available 3 x 63 amps grid connection on site can supply. Therefore, a Greener battery was deployed on location for peak shaving. This means that the grid connection still supplied the energy and charged the battery, while the battery was only used when the power peaks were too high for the grid connection to handle. This way, the electric vibratory hammer was powered by 100% electricity all the time even with the small grid connection available.
Read more about this electric sheet piling project in the article published by Cobouw (in Dutch) here.