FLOODGROUTING


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Storm And Sewer Lines Repair

Flood Grouting Systems:

Storm And Sewer Lines, Catch Basis Pipegrout And How It Works

Environmentally Friendly

The ingredients PG1 and PG2 used in the PIPEGROUT flooding system are environmentally neutral. PIPEGROUT PG1 is a specially formulated liquid with a high degree of viscosity.

Material Stability

PIPEGROUT is resistant to all kinds of acids and alkalis that can occur in sewer systems and is also resistant to bio-genetic sulfuric acid. The conglomerate that is formed is similar to sandstone and does not shrink or expand after hardening. It does not dissolve, and remains in a stableĀ form.

How Does It Work?

The primary options available for the rehabilitation of pipes is the excavation and replacement of the damaged pipe section or lining the pipe with a sleeve. However, there is an alternative, the injection process. This process is used for sealing leaks in the region of the pipes, pipe joints and manholes, as well as lateral cracks.

Storm And Sewer Lines Repair - fill level sewer systemPipe rehabilitation is generally possible from 1 inch diameter up to 30 inches in diameter, but it is limited to the size of the delivery equipment.

Before starting the rehabilitation, the volume of the whole sector to be rehabilitated is calculated on the basis of existing plans and inspection results and the amount of PIPE GROUT required is estimated based on the type of damage and its extent or on the basis of a water leakage test.

In the first working step, the sector to be rehabilitated is taken out of service by inserting sealing balloons or sealing discs at the cleaning and inspection openings. Then the sector is cleaned.

The cleaning is carried out by a high pressure cleaning process and starts at the end manhole and high point of the collector and ends at the manhole of the main collector. The street runoffs and their connecting drains as well as the rainwater pipes are cleaned separately from the surface.

After the cleaning process has been completed and the sector to be rehabilitated has been sealed off at the manhole of the main collector, you need to start at the lowest part of the sector with the filling of the connected pipe system containing PIPEGROUT 1 (PG1). As long as the tanker possesses a correspondingly long filling hose, it can be placed at a distance of up to 150 ft from the manhole for this purpose, thus minimizing traffic disturbances.

The filling process is strongly influenced by the exfiltration rate of the fluid. Therefore, when the filling process has reached the crown of the pipe or a height of 2 ft above pipe invert, the filling process is interrupted for approx. 3 min. in order to judge the loss of fluid.

If there is little loss of fluid, then the filling process is continued as follows:

Storm And Sewer Leak Repair without diggingFill the PG1 up to the top level of the manhole. The lowering of the fluid level is measured by instruments and recorded. After about 30 minutes, the injection medium loss is filled up again to the top of the manhole by renewed filling. The hydrostatic pressure forces the injection medium into the leaks or through it into the ground. The PG1 injection medium is left in the sector to be rehabilitated for approx. 45 minutes before it is removed by vacuum pumps.

The sector to be rehabilitated is flushed out with water at a low pressure after each filling process in order to prevent deposits of the injection medium at the sewer walls and especially in the region of the invert. The pipes that cannot be cleaned with the HP process are flushed out with a hose from the surface.

In the second filling process, the sector is filled with PG2 injection medium in the same manner as with PG1 to the top of the manhole. This component also remains in the sector to be rehabilitated for approx. 45 minutes. There it reacts with the PIPEGROUT 1 adhering to the embedment in the ground material and combines to form an irreversible watertight conglomerate.

When the sinking of the fluid level comes to a stop, the PG2 is filled once more up to the top. If no further lowering of the level is observed, then the sector to be rehabilitated is leak tight, i.e. it has been successfully repaired. The PG2 is pumped out and the rehabilitated sector is flushed out again.

If after 45 minutes of effective time, a lowering of the fluid level can still be observed, then all the working steps in the procedure are repeated until the sector to be rehabilitated is leak tight (the PG2 level remains stable).

After completion of the rehabilitation measures, the sector is cleaned and, after removal of all sealing balloons or discs, the sewer system can be taken into operation again.

During the execution of the rehabilitation measures, all results and observations are noted in the rehabilitation record.


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