In the field of underground infrastructure, it is often necessary to ensure the stability and proper alignment of concrete pipes during installation or extraction operations. In these scenarios, a mechanical retention system based on CMF-series hydraulic cylinders is employed.

The system consists of a couple of half rings internally lined with hardwood, functioning as a friction surface and positioned around the pipe to be restrained. The half rings are pressed against the pipe’s surface by CMF-series hollow hydraulic cylinders, specifically selected for their capacity to exert force in narrow spaces.

In this configuration, the steel plate to which the cylinders are mounted is fastened to the steel lining of the excavation shaft, absorbing the tensile forces transmitted by the anchoring rods. This system ensures a secure and temporary anchoring of the pipe segments during the jacking phase, as demonstrated in the video.

Europress’s CMF cylinders can operate both in tension and compression, thanks to the possibility of inserting rods or cables through the plunger’s central hole. They are particularly suitable for pretensioning of tensile structures, mounting and extraction of pulleys, bushings, and heat exchanger tubes.

CMF cylinders, available in both steel and lightweight alloy versions, offer push forces ranging from 10 to 100 tons, with strokes varying from 8 to 150 mm. Their metric-threaded body and base mounting holes simplify integration into metal containment structures.