Home > Atef Helal uses Enerpac’s cylinders and lifting systems

Atef Helal uses Enerpac’s cylinders and lifting systems

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article image King Ramses II statue

The giant statue of King Ramses II was moved recently from Cairo Central station, downtown Cairo, to a more serene home near the Great Pyramids.

For more than 53 years, the statue for Ramses II was the centrepiece of the famous square in Cairo that was named after him. But the Ramses square is considered to be one of the crowded places in Cairo.

Because of extensive pollution and weather conditions, the Egyptian government decided to relocate the statue last year to the new Grand Egyptian museum near the pyramids plateau.

The main reasons for the relocation included protection of the statue against excessive vibration as well as air pollution by relocating it in a suitable environment where it can rest in harmony with the surroundings.

The 83-ton granite statue is a masterpiece of ancient Egyptian art because of the precise proportions of its body parts and of course because of, its age which exceeds 3000 years. The 11.35 metre tall statue and has a volume of 24.2 cubic metres of Egyptian granite.

In order to put the statue in a precisely vertical position, a steel frame was designed to let the statue move freely in the XY plane to eliminate any internal forces that may have damaged it, because ultra sound tests showed that some internal cracks already existed.

Atef Helal, the contractor involved, studied the statue for months because it was originally reassembled from six pieces when the government made repairs in early 50s to and put it back together.

The studies concluded that there would be considerable risk to the structure if the statue was to be transported horizontally.

To ensure precise vertical positioning, the contractor used four Enerpac 90 ton RCS cylinders with an equal number of air/hydraulic pumps to lift the statue free and to determine its centre of gravity.

During this process, a lot of attention was paid to any internal forces in the statue, while assuming its final position for transportation.

RCS cylinders are part of Enerpac’s range of low-height cylinders, available in capacities from 5-90 tons in collapsed heights (i.e. with plungers retracted) from just 32-141mm so they can fit into awkward spaces (such as beneath some bridge bearings, or under low machinery where cranes cannot be brought in overhead.)

The cylinders can be safety and precisely controlled and synchronised either by custom-built pump and valve arrangements (as in this case) or (in demanding applications).

Enerpac’s computer-controlled synchronous hydraulic lifting system can be used with multiple cylinders ranging from 10-1000 tonnes capacity each.

This system detailed in Enerpac’s new E325A catalogue uses digital synchronisation control accurate to within a 0.1 millimetre between leading and lagging lifting points.

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