Motorway construction

By order of the federal state of Hesse, Bickhardt Bau AG renovates and expands the six-kilometre section of the A 4 motorway between the Kirchheim three-leg interchange and the Bad Hersfeld motorway junction to a six-lane motorway. This work is performed in a consortium. High traffic volume as well as missing hard shoulders and additional traffic lanes on incline sections often led to accidents and traffic jams.

In two large construction phases, first the southern traffic lane was constructed using the method of concrete construction. Centre piece of the building project was the restoration of the 200-metre long Asbachtal bridge. The special feature is as follows: The limestone substructures which are typical of the viaduct built between 1938 and 1942 were preserved and equipped with a new superstructure. The new roadway slab protrudes beyond the historical structure to a distance of almost five metres. In this way, the traffic lanes have been widened from nine to 14.50 metres (3 traffic lanes plus hard shoulder for each carriageway in one direction of the motorway).

Earthworks:

277.000 m³ of soil movements
5.000 linear metres of drainage
9.000 linear metres of drainage pipes

Superstructure:

140.000 m² of road superstructure, using the method of concrete construction
6.000 linear metres of vehicle restraint systems made of concrete

Bridge construction and civil engineering:

Renovation of the superstructure of Asbachtal bridge
Construction of the overpass of Jägersteig
630 linear metres of a sandstone heavy-load wall

Closure of the gap at the A 66 motorway between the Neuhof-Süd motorway junction and the Kreuz Fulda-Süd motorway interchange: The core of the still remaining motorway section which is almost seven kilometres long is the 1.6-kilometre long Neuhof tunnel which is designed to noticeably reduce the traffic volume for the benefit of the residents of the town. At the same time, a bundling with the ICE route takes place.

The tunnel will be constructed by means of the cut-and-cover method. For this purpose, altogether one million cubic metres of soil must be moved. The redesign of the Neuhof railway station is closely linked to the tunnel construction. The railway station receives a new station forecourt and a new park and ride facility, apart from a new track system.

Earthworks:

1.050.000 m³ of soil movement
      22.000 m³ of anti-freeze protection

Drainage:

9.000 m of drainpipes, different DN
2.200 m of deep drainage

Road construction:

40.000 m² of asphalt superstructure
  4.000 m² of pavement with substructure (P+R facility)
  1.200 m of kerbs (P+R facility)

Civil engineering:

1 tunnel structure, frame-shaped cut-and-cover tunnel construction method 1600 m, RQ 26t
1 three-span bridge structure, inside width 100 m
2 overpass structures, 2 underpass structures, inside width 18 m

Track construction:

5,100 m of new track construction, 15 points, 6,600m³ PSS

"The A 71 motorway is a market entry and opens up marketing opportunities for the entire region between Südharz and Erfurt." This was emphasised by the Ministerial Director, Prof. Dr. Josef Kunz, Head of the Department for Road Construction and Road Traffic at the German Federal Ministry of Transport, Building and Urban Development, during the symbolic ground-breaking ceremony for the new construction of the A 71 motorway between Sangerhausen and Artern.

Over a length of 9.2 kilometres, the consortium of Bickhardt Bau/Bickhardt Bau Thüringen constructed the interregional motorway which is designed to reduce the traffic volume for the benefit of the residents of the cities, towns and localities along the B 85 and B 86 federal roads. For the construction of a three-leg motorway interchange as connection to the A 38 Südharz motorway and in the course of the new construction of the four-lane motorway route, two million cubic metres of soil needed to be moved. For the construction of the major part of the roadway, the method of concrete construction was applied (215,000 square metres). The bridge junctions and the exits from as well as the access roads to the A 38 motorway were paved with asphalt.

In addition to it, the bridge builders of Bickhardt Bau AG erected nine of the altogether 16 bridge structures of that motorway section.

Earthworks:

1.950.000 m³ of soil movement
      85.000 m³ of anti-freeze layers
1.600.000 m³ of soil improvement

Drainage:

 3,100 m of drainpipes, diameter DN 300 – DN 800
11,500 m of piggyback lines, diameter DN 100/300 – 100/600
         5 rainwater storage reservoirs

Superstructure:

215,000 m² of ground stabilisation
215.000 m² of concrete road construction

Civil engineering:

7  motorway bridge constructions/structures, inside width of up to 23 m
2 overpasses, inside width of up to 40 m

The A 7 motorway is one of the most important north-south links of Germany. Additionally, it is considered an important north-south route in the European transport network. Therefore, the Authority for Road Construction and Transport of the federal state of Lower Saxony initiated the six-lane upgrade of the A 7 motorway between the Drammetal three-leg motorway interchange in the south and the Salzgitter interchange in the north of the federal state.

The expansion of the motorway did not only include the widening of the roadway by the construction of a third traffic lane in every driving direction, but also the extension of the drainage systems and precautionary measures for active noise protection for the benefit of the surrounding towns and localities. For the six-lane upgrade of the A 7 motorway between the Göttingen-Nord junction and the parking place of Parensen, Bickhardt Bau AG was awarded the contract which was carried out in a consortium. The route section was 10,200 metres long.

Earthworks:

953,000 m³ of soil movement

Road construction:

Milling and breaking of 593,000 m³ of bituminous base layer
182,000 m³ of anti-freeze layer
382,000 m² of bit. base layer,
327,000 m² of asphalt binder
370,000 m² of asphalt covering layer

Drainage:

16,300 linear metres of concrete pipes
14,000 linear metres of seepage pipes
          5 rainwater storage reservoirs
        19 rainwater retention ditches

Miscellaneous:

20,800 linear metres of concrete safety barriers made of prefabricated elements
      800 linear metres of steep wall, 9 m height

Bickhardt Bau extended the Rhön-Ost petrol station and roadhouse at the A 7 motorway close to Bad Kissingen during the ongoing operation. 96 truck parking spaces, 10 bus bays, 17 passenger car parking spots, 10 caravan parking spaces and two parking areas for large-sized and heavy goods vehicles were additionally created. The parking areas - covering an area of altogether 10,500 square metres - were constructed using the method of concrete construction. They are suitable for heavy loads: A slipform paver with a working width of 18 metres was used for this process. Another 11,000 square metres of road surfaces and access roads, slip roads and exits were paved with asphalt.

In the preparatory stage of this construction work, the earthwork specialists moved 60,000 cubic metres of soil to shape the terrain for its new use. However, the subsoil was not easy to handle: 20,000 cubic metres of bedrock needed to be detached, broken and loaded. Furthermore, during the pipe jacking of a 110-metre long DN 1200 pipe, the specialists hit against bedrock layers again and again. This considerably complicated the pipe advancing. The job task also included the construction of two rainwater storage reservoirs. 30,000 cubic metres of soil were moved for the construction of the larger basin alone.

Earthworks:

60.000 m³ of soil movement
removal of 20,000 m³ of rocks

Superstructure:

dismantling of 20,000m² of existing roadways and parking areas,
construction of 30,000 m² of road surfaces, paved with asphalt,
construction of 10,500 m² of concrete pavement,
construction of 3,350 m² of paved areas

Drainage:

4,700 m of pipes
2 rainwater storage reservoirs

Miscellaneous:

100 m of pipe jacking DN 1200