Economical median ­drainage

Drainage, apart from a properly constructed road surface, is of particular significance for the construction of new highways and their repair. Two aspects play an important role: First of all, the transverse slope of the road surface that enables surface water to flow off sideways; secondly, a functional sewage system that receives the precipitation. This sewer, on Autobahn 3 (A 3), between the German cities of Bad Camberg and Idstein, was in dire need of repair in the area of the median.

“Curbs alongside highways are as a rule formed into trapezoidal bays that accommodate rainwater inlets of 50 cm width,” says Dipl.-Ing. Norman Wille of the consulting engineers Ingenieurbüro Grandpierre & Wille. “This is realized by using flat curbstones with a cross-section of 20 x 20 cm. The recess is implemented with standard blocks, which, however, have to be bevel cut to obtain the exact dimension required.”

For repairing the median of the A 3, a system without bevel cuts was specified; the rain inlet was to have a rounded shape in order to optimize the cleaning effect of the road sweeper. The designer of system, Norman Wille, in close collaboration with the manufacturer of the blocks, Meudt Betonsteinwerk, located in Wallmerod nearby, developed a rainwater inlet structure that met all of the specifications. “The result is a bay with a length of 305 cm,” says Wille. “The transition to the standard block is in each case realized with a standard radius block with an outer radius of 1 m. A half block F 20 x 20 with a length of 50 cm is installed directly above the inlet grating.” Required was still a transition from the R1 to the half block. For this, the company Meudt developed a special shaped radii block with an inner radius of 0.8 m. With these blocks, placed side by side, the specified dimensions for the bay could be precisely obtain: It can be installed much quicker than the conventional systems, the individual components are manufactured in the plant and provide a precise fit.

Related articles:

Issue 2015-03 Remmers

Concrete repair with Betofix

Betofix R4, a product for repairing concrete, according to the manufacturer, provides the highest resistance to chloride ingress. This is crucial not only for repairing marine structures, but equally...

Issue 2021-01

Renovation drain system for repairing concrete drain

(11) EP 3 693 647 A1 (22) 23.09.2019 (43) 12.08.2020 Bulletin 2020/33 (57) Renovation drains and liner members are used for repairing sewer drains, storm drains, and other drains made of concrete. The...

Issue 2020-09

Liner drain for repairing concrete drain

(11) EP003683371A1 (22) 01.10.2019 (43) 22.07.2020 Bulletin 2020/30 (57) A liner drain (100) for repairing a concrete drain comprises a liner (101) to be impregnated with compound and this liner has a...

Issue 2020-02

Joint forms and associated techniques for repairing and sealing concrete expansion joints

(10) US 2019/0390418 Al (22) 18.06.2019 (43) 26.12.2019 (57) A joint form is positioned in a damaged expansion joint to allow both sides of the joint to be repaired at the same time. The joint form...


Two bonded roundabouts for a new traffic link

AB 62, with a total length of only 79 kilometers, is among the shorter federal highways in Germany. It connects the city of Pirmasens on the northwestern edge of the Palatinate Forest with the...