Intervene in the restoration of the subsoil without interrupting surface activities.

Point Repair - Benassi Srl

Point repair

A new generation balloon, wrapped in a fiberglass mat soaked in resin, is pushed with pneumatic means, or pulled with a rope up to the damaged point of the existing pipe whose coordinates have been previously produced with a television inspection. Once the position is reached, the balloon is inflated with compressed air. In this way, the balloon expands up against the wall of the tube, crushing against it the resin-impregnated glass fibers.

The excess resin comes out and fills the damaged areas of the tube wall, where they remain permanently. The resin-impregnated glass fiber is then catalysed at room temperature, according to the instructions of the resin manufacturer. The polymerization times of the resin may vary depending on the conditions inside the tube.

Once the polymerization of the resin is complete, the balloon is deflated and removed from the conduit. At this point the fiberglass carpet covers the entire affected area without any hindrance to the flow. The rehabilitated pipe in this way is an integral structure that fully responds to the required hydraulic characteristics.

Side repair

For the side panels LCR balls are also used wrapped in resin and pushed by a series of pneumatic cylinders or on a trolley, or pulled by a rope up to the point to be repaired, the coordinates of which were previously produced with a television inspection. The peculiarity of these balloons is that they are equipped with a telescopic pole adjustable according to the angle of connection of the side channel and equipped with an inverted cap profile and impregnated with resin.

The rod, being telescopic, is located inside the balloon up to the point of the branch where it is extracted and inverted inside it by compressed air. Once the point to be repaired is reached, the compressed air is inflated inside the balloon. The rod that is inside is pushed out at the lateral branch of the tube and pushed against the edge of the connection point with a force that guarantees its seal.

The excess resin penetrates into the cavities of the damaged section forming a single body with the glass fibers of the cap and the walls of the existing tube. The profile of the hat is made specifically to guarantee the sealing of the space between the hat and the side, while the LCR balloon looks like a localized hose.

Both in the case of the flask and of the cap, the resin is polymerized at room temperature according to the instructions of its manufacturer. The polymerization times of the resin may vary depending on the conditions inside the tube. Once the resin is catalyzed, the balloon is deflated, the telescopic rod is withdrawn inside it and everything is removed from the pipe.

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