The subject of the contract is the execution of construction works consisting in the construction/reconstruction of piling equipment of the retention tank Forestry Grabownica branch 64 j and the construction of piling equipment of the retention tank Forestry Skoroszów branch 293 c.
Construction of piling equipment of the retention tank Forestry Skoroszów branch 293 cReconstruction of the inlet abutment of the drain structure.
During many years of operation, the inlet abutment of the drain structure was destroyed. Accordingly, its demolition and restoration are planned. Inlet abutment parameters:
mountain elevation — 127,68 m above sea level.
bottom elevation (inlet into the culvert pipeline) — 125.18 m above sea level.
height of the structure — 2,50 m
left/right wing width — 4,90/5,50 m
structure thickness — 0,40 m
dimensions of the inlet chamber — 1,10x1,10 m
The inlet chamber of the abutment is equipped with two guides to close — shandors. The guides of the shandors will be two pairs of 65 caectors.
Demolition and restoration of the abutment is envisaged from the parameters given above. The material from the demolition (debris) will be disposed of at the landfill. Due to environmental conditions, work will take place with partially drained water from the reservoir surrounded by a sand hill sealed with PVC film. During the work, water flow — pumping will be preserved in accordance with the applicable water law permit. The inlet abutment will be made as a monolithic structure with wings with an extended “L” -shaped foundation made of structural concrete C37/37 on a layer of underconcrete C12/15 and compacted sand.
Building/reconstruction of the pile equipment of the retention tank Forestry Grabownica Branch 64 jIt is envisaged to build a new valve at the outlet from the tank with the following parameters:
construction: reinforced concrete valve,
light: 1,00 m,
length/width: 12,20/0.30 (1,00) m (with footbridge)
Inlet/outlet elevation: 114,55 m above sea level,
mountain elevation of structures: 115,65 m above sea level,
Closures: shandorous,
reinforcement: 20 cm thick stone overhead on geotextile bounded by a wooden palisade — pegs Ø8 cm long 1,00m, on a length of 1.00 m from the upper water side and 2,00 m from the bottom water side,
The design drain structure will maintain a constant level in the inforest retention tank at an elevation of 115.20 m above sea level.
It is envisaged to make the structure in question made of structural concrete C37/37 on a layer of subconcrete C12/15 and compacted sand. In addition, a protective guardrail from the side of the top water is planned to be made on the drain structure being designed.