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Aiming high for efficientand reliable qualityCivil engineering / Constructual engineering
Renovation railway overbridge Wertach km 4.015 line 5440
Customer: DB Netz AGConstruction period: 19 months Year of construction: 2020–2022
- Overcrossing of railway line Buchloe-Füssen over the river Wertach near Marktoberdorf. Demolition of the existing steel lattice formwork construction built in 1910 and new construction of the overcrossing as tied arch bridge made of steel. Production of the new abutments and auxiliary bridges during railway operation and production of the new steel superstructure alongside the railway, as well as putting the superstructure into position (lengthwise and crosswise movement) over streaming water during a railway shutdown.
- Concrete: 170 m³
- Reinforcement steel: 33 t
- Bored piles: 130 running metres, d = 90 cm
- Steel superstructure: 350 t
- Span: 50 m
Measurements:
Motorway A8 junction Stuttgart-Möhringen, expansion of junction 52a
Customer: Autobahn GmbH des Bundes – Niederlassung SüdwestConstruction period: 8 months Year of construction: 2021–2022
- Due to the former traffic light/crossroad situation there used to be traffic jams up to the motorway A8 during rush hours. In order to solve this situation, the bridge crossing over an agricultural road was expanded by one lane. In connection with the expansion of the bridge, new supporting walls were constructed in the area of the lanes and of the agricultural road. All construction parts like ground slab, superstructure and supporting walls needed to be constructed respecting the radius of the junction. In addition to the limited space available this also meant working during traffic operation.
- Reinforcement and reinforced steel works incl. formwork
- Building sealing and mastic asphalt works
- Sewer construction
- Earth and road construction works
- 44 t steel
- 260 m² concrete
Particularities:
Measurements:
Motorway BAB A7 interchange Feuchtwangen/Crailsheim
Customer: Autobahn GmbH des Bundes – Niederlassung NordbayernConstruction period: 21 months Year of construction: 2021–2022
- The 2-field-flyover in steel composite construction elevates the motorway BAB A7 over the motorway BAB A6. Both fields have a span of about 30 m and 35 m. The abutments have flat foundations and the middle pillar, which is the anchor point of the bride, was founded on bored piles with the diameter of 1.20 m. The execution was carried out in two construction phases. First of all, the two outer lanes (leading to the motorway BAB A6) and then the inner main lanes (motorway BAB A7) were produced. In order to keep the shutdowns of the motorway as limited as possible, the flyover was planned as a steel composite construction. For the construction a total of 48 compound prefabricated girders with an individual weight of approx. 45 t each were lifted in during nighttime shutdowns. The particularity of this construction measure was that the individual lanes of the motorways BAB A7 and BAB A6 were open for traffic all the time and that shutdowns had to be limited to short nighttime intervals of individual lanes.
- 2-field bridge in steel composite construction method
- Abutments with flat foundations
- Fixed anchor point is the pillar in the middle, which is founded on bored piles
- Production in 2 construction phases
- approx. 5,500 m² structural concrete in foundations, abutments, and in-situ concrete slab
- approx. 300 m² rim beam concrete
- approx. 1,000 t reinforcement steel
- approx. 800 t constructional steel for compound prefabricated girders
- approx. 4,100 m² bridge pavement slabs
Particularities:
Measurements:
Extension purification plant Hardheim
Customer: Abwasserzweckverband Hardheim - HöpfingenConstruction period: 17 months Year of construction: 2021–2022
- Production of the new access to the purification plant
- Production slope stabilisation east
- Production of structures in reinforced concrete (combination basis 2, compressor station, distributor building, outlet shaft KB2
- Pipe works
- Outside facilities
- Combination basin 2: construction by means of dismantled bored pile wall, which was partly anchored to the rear. Foundation piles as tension piles. Walls as supporting structure rated category B with a height of 5.95 m. Special formwork construction funnel formwork and formwork centre support
- Compressor station: exterior wall as supporting wall for slope stabilisation simply anchored to the rear. Building pit production by means of Berlin-type pit lining
- Distributor shaft: underpinning of the existing shaft in different layers. Building pit production by means of Berlin-type pit lining.
- Dismantled bored pile wall for slope stabilisation twice anchored to the rear.
The construction project is divided into various construction phases:
Particularities :
New construction Egelseebrücke, B10 Vaihingen
Customer: Regierungspräsidium Stuttgart, Ref. 47.4Construction period: 20 months Year of construction: 2019–2021
- Replacement construction of a lengthwise pre-tensioned three-span-bridge with a double-webbed t-beam cross section over the river Enz, as well as dismantling of the existing auxiliary bridge. The total span of the superstructure amounts to 92.01 m, width 12.10 m. The 7 m deep excavation of the building pit for the piers was carried out under water with the protection provided by sheet pile boxes. The foundation of the piers was produced on an under-water concrete floor extended by tension piles. The production of the pre-tensioned concrete superstructure was carried out by means of a support structure over the river Enz (max. length of field of the support structure 30 m).
- 3,000 m³ concrete, 1,100 m³ of which in the superstructure
- 300 t armouring
- 37.5 t prestressing steel
- 330 m drilled piles
QUANTITY
Seckachtalbrücke Adelsheim
Customer: Regierungspräsidium KarlsruheYear of construction: 2017–2019
- The bridge construction is an about 290 m long hollow-box bridge with lengthwise pre-tensioning built in a composite design. As the routing passes through the premises of a company, the superstructure had to be installed at intervals. The routing of the federal road B 292 is pre-defined, so that the viaduct crosses the Seckachtal (valley of the river Seckach) south of the junction Adelsheim Nord at a height of about 20 m from the West to the East with a variable longitudinal inclination (trough form). The routing defines a radius, which turns into a spiral curve just before its end. The base structures are founded in 6 axes on large drilled piles. The spans of the individual fields of the bridge amount to about 58 m.
- Drilled piles Ø = 1.50 m with lengths up to 36 m as inclined piles with an inclination of 10:1
- Four bridge piers inclination of 22:1
- Production of the superstructure by means of incremental launching (11 launches)
- Bridge radius R=450 m turns into a spiral curve. The carriageway slab turns in launch 1 and 2 (to 35 m) from 0 % to 5 % inclination, this leads to variable root faces and cantilever widths.
- Longitudinal pre-tensioning in composite design (external and internal tendons)
- Launching of the superstructure over the company premises and the country road L519 during operation.
Particularities
Bridge motorway A 8, junction Mühlhausen
Customer: Regional council Stuttgart, office GöppingenYear of construction: November 2016–July 2017
- Partial renovation of the bridge (foundations and parts of the columns were left untouched).
- New construction of bearings, columns and superstructure as steel composite construction.
- Traffic routing during the Construction period over an auxiliary bridge with 33 m span width.
- one bearing was constructed with rear anchoring with 20 m long jacked piles.
- On proposal of LEONHARD WEISS the steel girders (3 girders) were not delivered in two pieces and welded together on site, but transported to the construction site on the motorway in one piece with a length of 46 m and a weight of 25 t and lifted into the construction during one nightshift by means of the tandem lift method.
- 500 m³ concrete
- 100 t concrete steel
PARTICULARITIES
QUANTITY
City of Weinheim
Customer: City of WeinheimYear of construction: September 2013–October 2014
- The city of Weinheim is building an underground, closed rainwater retention basin with inlet and outlet pipes in the urban district Lützelsachsen at the location of the planned P+R car park. The buildings are composed of a rainwater retention basin with 2 chambers and an outlet shaft, as well as an inlet shaft and a measuring and throttling shaft with downstream shaft.
- Chamber 2 of the rainwater retention basin was closed in with steel pilings. The underwater concrete floor was constructed with rear anchoring by means of piles, in order to prevent the floor from buoying upwards / erupting.
- 277 t concrete steel
- 1,255 m³ concrete
PARTICULARITIES
QUANTITY
Suburban railway bridge over Wolframstraße, Stuttgart
Customer: Landeshauptstadt, StuttgartYear of construction: 2013–2014
- New construction of a 4-field steel composite bridge for the overpass of the new U12 suburban railway along the Wolframstraße road. In addition to the new "Budapester Platz" station on the bridge structure, pedestrian walkways were built on the structure on both sides of the tracks. The superstructure is planned as a trough cross-section with a constant height of approx. 2.20 m as well as span widths of 25 m - 39 m - 52 m - 31 m. The superstructure is pre-tensioned in the longitudinal direction in each of the field ranges.
- Removal of 20,000 m3 of rubble
- 550 m large piles
- 710 t foundation
- 6,200 m2 of form work
- 700 t of reinforced concrete
- 25 t pre-stressing steel
- 4,500 m3 of concrete
- 3,300 square meters of sealing
QUANTITIES
Grünbrücke Michelsrombacher Forst
Customer: Hessen Mobil FuldaConstruction period: 7 months
- Two-field bridge construction without bearings for connecting the habitats of wild cats and red deer over the motorway A7, north of Fulda. The total length between the abutments amounts to 46 m, the total width between the camouflage walls to 50 m. The superstructure is made of 36 pre-stressed double-web beams which were installed during two shifts, during which the road was fully closed in the respective direction, and the structure was completed by means of in-situ concrete. After the sealing and backfilling works were terminated (including cover filling the superstructure), 180 m railings and 200 m camouflage and irritation protection walls were installed.
- Earthworks: 20,000 m³
- Concrete: 4,600 m³
- Steel: 715 t
- Prestressing steel: 42 t
- Pre-stressed concrete prefabricated beams: 36 pcs.
- Cornice prefabricated beams: 20 pcs.
QUANTITY
