Contract No. F2b-6-2014 - Reconstruction of drainage of the A4 motorway between the Silesian province - Part II Duration of the works: July 2016 – February 2018
As part of the F2b-6-2014 contract, 4 retention-purification reservoirs with a total active volume of 1632 cubic meters were built. For execution of reservoirs more than 13,000 cubic meters of material were excavated. Due to the high level of groundwater, two reservoirs were ballasted with a concrete layer in the amount of 2690 cubic meters.
In addition, 8 storm water sewer of pipes with diameters in the range of 300 mm - 1000 mm were executed. The total length of the storm water sewer is 1827 m. The water supply network has also been rebuilt.
In order to exceed A4 motorway as well as local roads with sewage 438.5 m drills of steel pipes with diameters in the range of 610 mm - 1067 mm were executed.
The contract required repair and reconstruction of existing motorway ditches. There were over 9,000 m of grass-covered ditches, 748 m of ditches strengthened with precast concrete elements, and 440 m of triangular sewage draining rainwater from the motorway, through drains, to the storm water sewers.
Executed reservoirs were fenced by a highway grid, also part of the fence along the motorway was rebuilt. The total length of the new fence was 2298 m.
In order to service executed storm water purification equipment, 5 service yards and 3 technological roads with a total area of 3230 square m were built.
Accompanying work was to secure telecommunication and power lines.
Contract No. HM-3-2016 - resurfacing 2016-2017 Duration of the works: February 2016 – November 2017
The object was to replace the existing wearing course on the motorway A4 Katowice - Cracow.
Renovation was divided into 12 sections with a total length of approx. 58,5km.
Traffic in both directions was in two lanes, in the carriageway under execution redirecting one of them on the second carriageway.
To ensure maximum safety, both directions of traffic were separated by continuous temporary safety barriers.
During the renovation, which lasted until October 2017 there was about 660 thousand square m of the old highway pavement milled. In its place more than 62.8 thousand tons of new bitumen (binder course and wearing course) was arranged.
There were also foreseen 36.1 thousand square meters of new road markings in thick film technology.
Under Contract HM-3-2016 there were built in over 53k tones of asphalt mix on the area app. 590k m2. The scope of works was performed on the length 53,7km of one carriageway. The remaining section is to be completed during the 2018.
Contract No. ROM48 - renovation of supports of the bridge object M48
Currently works are conducted on a Contract related to the renovation of supports of the bridge object M48 located at km 389 + 368 of the Katowice - Krakow A4 motorway.
For the purpose of performing the works, the extensions of both motorway carriageways were built along with crossings of 85m length, enabling vehicles to communicate with two lanes in both directions at the time of closing one of the carriageways during the renovation works of the bridge. In addition, due to the course of the railway line under the building, a protective construction was executed of permanent sheet pilings from steel.
Renovation works refers to all supports of the bridge structure, 58 poles with heights from 7.65m to 11.56m above ground level, and 22 capping beams. Renovation works includes removing external corroded layer of concrete, cleaning and protection of the reinforcement, replacing reinforcement rods which corrosion exceeds 30% of cross-section, replacing stirrups with new of Ø12 rods cross-sections, inserting in columns rods joining old concrete with new, laying of longitudinal and lateral reinforcement for poles, execution of self-compacting concrete, increasing dimensions of poles by 7.5 cm (in relation to the original) in each direction, which gives a minimum thickness of reinforced concrete coat 19cm and also shotcrete of the capping beams.
Before execution of renovation works of individual poles, temporary supports will be executed, designed to support structure carrying repaired poles zone, so as not to change the static work of the bridge object. After the concrete has reached its full strength, the temporary supports will be removed.
Works on the M48 bridge object will last until November 2019.