Poland - Construction of hydraulic engineering structures

Description

The contract "Restoring the ecological continuity of the Soła river through the reconstruction and construction of weirs at km 0+750 of the river in Broszkowice, commune of Oświęcim, poviat of Oświęcim and at km 16+200 in Bielany, commune of Kęty, poviat of Oświęcim", as part of the project "Restoring the ecological continuity of the Vistula and the lower sections of the Soła and Skawa rivers" consists of the following tasks a) The task named "Rebuilding the existing fish passage at the weir at km 0+750 of the Soła river in the town of Broszkowice, commune of Oświęcim, county of Oświęcim, malopolskie voivodeship" b) The task named "Construction of a fish passage in the form of a bypass at km 16+200 of the Soła river in the town of Bielany, commune of Kęty, county of Oświęcim, malopolskie voivodeship".
The order consists of the following tasks: a) Task named "Rebuilding the existing chamber fishway at the weir at km 0+750 of the Soła river in the town of Broszkowice, commune of Oświęcim, poviat of Oświęcim, Voivodeship of Lesser Poland" includes The project "Małopolskie" includes: - Rebuilding the existing fish ladder into a new single-slot fish ladder using the elements of the old fish ladder located at the weir and weir stage at km 0+750 of the Soła river within the village of Broszkowice.Parameters of the fish ladder: net width of the fish ladder - 2.0 m, net length of the chamber - 3.4 m, number of slots - 1 piece, The width of the slot - 0.35 m, the filling in the slot - 1.0 m, the drop between the chambers - 0.10 m, the number of chambers - 19, the length of the fishway - 166 m. The new baffles will be made with 3.6 m axial distance in the number of 20 pieces. The walls will be 20 cm thick and 1.7 m high. The walls of the baffles will be founded directly on the existing fishway bottom or on a reinforced concrete footing in the form of a cuboid with dimensions in a plan 105 x 200 cm. The partitions are approximately 76 m long. The space between the barriers will be filled with gravel.- Monitoring.The monitoring station will be located in the central part of the fish ladder. This element will consist of a frame for mounting the scanner, gratings for guiding fish into the scanner and a hoisting mechanism.Frame for mounting the scanner - will consist of 4 C80 channels 262 cm long, 2 45x45x5 mm angle bars 262 cm long, connected at three levels by 45.5 mm flat bars 169.5 cm and 52 cm long. The frame will be concreted in a reinforced concrete footing. Safety gratings - the grating system will direct fish to enter the scanner light. They will be mounted at the inlet and outlet above the scanner. Each grating will consist of 2 components: a bottom grating and a top grating.Hoisting mechanism - will be used to insert the scanner. It is planned to install a crane-crane (hoisting mechanism) on the walls of the fishway.- Canoe platformsFor canoe crossings, on the left bank, it is designed to install wooden beams above and below the existing weir, after the completion of concrete insurances. The beams will be bolted at 35 cm intervals to the existing concrete reinforcement of the bank slope with the use of steel anchors.- Power supply and controlConstruction and assembly of elements necessary for power supply and control in connection with the monitoring in the fish ladder together with a start-up of the system.b) Task titled "Construction of the fish ladder in the form of a bypass b) The task called "Construction of the fish ladder in the form of the bypass of a rapid at km 16+200 of the Soła river in Bielany, Kęty commune, Oświęcimski poviat, Małopolskie voivodeship" includes:- Construction of the fish ladder in the form of the bypass of a rapid at km 16+200 of the Soła river in Bielany. The depth of the fishway will be approx. 2.5 m. The parameters of the fishway: the length of the fishway - 120 m, the distance between the first and the last bolt - 112 m, the width of the bottom - 2.0 m, the slope inclination - 1:1.5 the number of bolts - 17, the distance between the bolts - 7.0 m.- Technical strengthening of the banksThe ring will be built of mesh and stone baskets with the dimensions of 50x150 cm. The baskets will be fixed to the ground with wooden stakes of 10-12 cm in diameter and 150 cm long. The rest of the band will be made of stone erratics, with a slope from the water side of 1:1.5 on a 25 cm layer of fascine bedding. The height of the banding from the foundation to the crown will be 3.5 m. The length of the band will be approx. 45 m.- Widening of the rapid with stone bedding On the existing rapid, the works will be limited to levelling the sloping part of the rapid with stone bedding, and to strengthening the bottom above the rapid overflow on the section of 5.0 m and extending the sloping part by approx. 15 m.- In km 16+197, an additional cross-bar will be constructed from two layers of mesh and stone baskets placed on a 25 cm layer of fascine bedding. The lower layer will consist of a basket with the dimensions of 50x200 cm, and the upper layer - 50x150 cm

Opportunity closing date

03 June 2022

Value of contract

to be confirmed