Tenders Are Invited For Renovation Of The Regulation Structures Of The Rybna Stream in Poland

Work Detail

The Subject Of The Order Is Construction Work - Renovation Of The Regulatory Structure Of The Rybna Stream Bed In The Town Of Grzmiąc, Walim Commune, Wałbrzych Poviat, Including: Preparatory Works - Construction And Demolition Of A Transverse Cofferdam Made Of Sandbags And A Temporary Pipeline. 40 Cm - 2 Sections Of Approx. 36 M Each - Demolition Of The Fallen Stone Wall And Its Concrete Foundation - 18 M - Demolition Of The Temporary Stone Riprap - 18 M3 Reconstruction Of The Wall: - Execution Of Earthworks With Removal Of Spoil To The Depository - Construction Of A Stone Retaining Wall 2.6 M High, On A Concrete Foundation (B-25), With A Variable Height From 1.20 M To 0.70 M And 1.45 M Wide By 23 M Long (Including A 2.5 M Wing). Wall And Foundation Expansion Joints As 2X Dry Felt, Approximately Every 10 M, Dia. 75 Mm In Three Rows, Alternating Every Approx. 5 M. The Details Are Presented In Fig. No. 3. - Backfilling The Space Behind The Wall With Soil Brought From The Depot. Renovation Of The Existing Wall - Construction Of A Concrete Foundation Band And Filling Of Empty Spaces In The Foundation Zone For A Total Length Of 46 M, (Concrete Mixture B-25) With The Construction Of Sockets For Wooden Supports - Renovation Of The Stone Wall By Dismantling The Damaged Layer Of The Wall And Re-Making It - 1.85 M3, The Demolition Stone Will Be Reused. Built-In - Cleaning Of The Crown And Face Of The Wall, -Approx. 142 M2 And Repair Of Joints On 100% Of The Surface - Reprofiling Of The Surface Of The Exposed Foundation Using Pcc Mortars - 46 M2 Works At The Bottom - Construction Of Sockets For Rails In The Form Of A B-25 Foundation With Anchored Rods Dia. 16 Mm - Construction Of A Railing (8 Pieces) In The Form Of Two Beams 20X20 Cm, L = 2.5 - 3 M Embedded In The Foundation Band And In The Slope (In Previously Prepared Sockets). Beams Made Of Hardwood (Oak, Beech) Or Larch. According To Drawings No. 1 And 2 - Laying A 40 Cm Thick Stone Riprap Made Of Stone. 300 – 500 Mm With Wedging With A Fraction Of 100 – 300 Mm And Clogging With Soil From The Excavation. In The Bottom And On The Slope For A Length Of 3 M (1 M Above And 2 M Below) At Each Bulwark. - Building A Pothole In The Bottom By Making An Underwater Rip-Rap Of 500-700 Mm Stone - 8 M3. During The Implementation Of The Task, Environmental Supervision Will Be Carried Out, And The Works Will Be Carried Out Taking Into Account The Principles Contained In The Publications: A) Catalog Of Good Practices In The Field Of Hydrotechnical Works And Maintenance Works, Along With Establishing The Principles Of Their Implementation B) Good Practices For River Maintenance C) Water Restoration - A Manual Of Good Practices For Surface Water Restoration - Available At: Https://Www.Gov.Pl/Web/Wody-Polskie/Nowe-Otwarcie-W-Gospodarowania-Wodami-Prze-Pgw-Wody-Polskie A Detailed Description Of The Subject Of The Contract Is Included In Annex No. 1 To Swz - Description Of The Subject Of The Contract.

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