Shaft refurbishment

Braumann rehabilitates shaft structures of all dimensions and designs

Sewer rehabilitation measures are only complete after the shafts have been rehabilitated. These include, for example, control shafts, pumping stations, rain basins, etc.

Die Arbeiten für eine Schachtsanierung beinhalten folgende Leistungen:

Sealing against groundwater indentation and exfiltration (injection packer)
Underground preparation
Lining with wastewater-resistant mortar
Professional renewal of canal and berm, replacement of damaged stirrups
Lowering of manholes to street level with the Braumann manhole lowering device

Manhole covers

Braumann creates free travel for clearing vehicles

We offer our clients a reliable and cost-effective solution to raise or lower manhole covers exactly to the road level.

The systems designed in our in-house workshop are applied by trained personnel and enable precise and trouble-free lifting and lowering.

When lowering, a double cut into the balancing ring is performed with the shaft saw, according to the desired depth. Afterwards, this part of the balancing ring is removed and the cover is adjusted to the required level. The ring gap is shed and sealed by means of a hose formwork.

When lifting the manhole cover, the frame is connected to the manhole cover lifting device and adapted to the required level. The ring gap is also shed and sealed with a hose formwork. The joint on the surface is sealed with permanent elastic material to prevent surface water from penetrating.

When replacing manhole covers, the existing manhole cover including the frame is removed and the new manhole frame and manhole cover is offset. The circular asphalt area, which has been removed, is then restored with mixed material.

Thanks to the easy handling of the SP V300 shaft frame cutting machine, nothing stands in the way of a quick replacement.

Advantages of shaft frame rahabilitation:

A technically optimal solution is provided by the circular section
Unnecessary cross-punches are avoided
Long-term solution by rolling-in self-levelling manhole covers
Extremely short construction time and reopened motorways after a few hours
Visually appealing refurbishment

Waterproofing of buildings

Braumann uses the injection method for sealing.

We insert holes in a defined grid into the shaft wall and screw in the drill packers. With injection pumps the resin is then injected behind the shaft wall via the packers to seal the shaft on the outer wall against intruding water.

After curing the resin, the drill packers are cut off and the boreholes are filled.

Automatic shaft coating

Braumann uses a highly efficient rehabilitation process

The shaft rehabilitation process used by Braumann with a "KS-ASS System" is based on more than 15 years of experience.

Cleaning with high pressure

First, the shaft wall is cleaned with a high pressure water jet of 370-400 bar. Subsequently, the shaft walls are coated evenly in the desired thickness in a spinning process via a rotating head.

A compact, mobile system

The operation is conducted via the touchscreen of the on-board computer. It also calculates important parameters such as the layer thickness, the residual mortar quantity and the time required – on the spot. The entire process equipment is mounted in an upgraded, construction site-ready VW Crafter. A really compact system with automatic shaft data acquisition for the renewal of your shafts!

Rehabilitation of shaft gutters, inlets and berms

Braumann skilfully handles everything up to the last detail

During the rehabilitation, defective shaft gutters are removed, new Duroton sole shells are placed in a mortar bed. The sole shells are then poured with mortar and the surface is smoothed out.

In the case of heavily stressed shaft structures, a lateral lift of approx. 10 cm with GRP hand laminate can still be produced after the berm. Glass fibre mats are soaked in silicate resin and applied in 3 layers. The second layer is plugged to the existing shaft wall.

Flexliner process

Measureing of the shaft by 3D laser scan
Model of the shaft is made of styrofoam
Polyurea flexliner is formed according to the scan
Existing clot is removed
Flexliner is introduced - the styrofoam model serves as support
Cavity is shed with chemically resistant cement mortar
Coating of the shaft walls by means of a horizontal slinging process.