Tenders Are Invited For Performance Of Construction And Assembly Works For The Realization Of An Object: Sew ... in Bulgaria

Work Detail

The Order Envisages The Completion Of A Sewage System For Domestic Waste Water In The Village Of Veselinovo And Includes: Main Sewage Branch I; Secondary Sewer Branches; Inspection Shafts; Wastewater Treatment Plant Stage Ii; Building Sewage Diversions; The Sewage Network Will Be Made Of Polypropylene Pipes Dn/Od 315 With Load Class Sn8 For Sewage Laid In A Reinforced Trench. The Inspection Sewer Manholes Will Be Made Of Reinforced Concrete Elements With An Internal Diameter Of Dn/D1000, Equipped With Cast Iron Covers D400 With A Minimum Clear Opening Of Ф600. The Bottom Is Monolithic With A Thickness Of 20 Cm. With Dimensions 140/140 Cm. Through The Construction And Assembly Works Included In The Implementation Of The V Stage, It Is Planned To Build A Sewerage Network With A Length Of 3,591.21 L.M. The Route Of The Sewage Network Will Be In The Axis Of The Street Lane. Excavation Works Must Be Carried Out In Sections From Рш To Рш, But Not More Than 100M. Excavation Of Each Subsequent Section Should Be Done After Backfilling The Previous Section. This Sequence Is Recommended In Order Not To Hinder Communication In The Village. Laying The Pipes Between Two Inspection Shafts Is Always Done From The Bottom Up On A Sand/Crushed Pad/. After Testing The Sewer, Proceed To Backfilling It First With Sand/Crushed Stone/ At A Height Of Up To 0.3 M, Above The Top Of The Pipe, Tamping It Carefully With A Light Rammer. Backfilling Should Be Done In Layers Of 0.2 - 0.3 M With Good Tamping. The Restoration Of The Crushed Stone Pavement Should Also Be With Ntk0/40, And The Restoration Of The Asphalt Pavement With Dense Asphalt Mixture. The Wastewater Treatment Plant In The Village Of Veselinovo With A Capacity For One Thousand Equivalent Inhabitants Will Be Completed By Two Treatment Modules With A Capacity Of 500 Equivalent Inhabitants Each. The Purification Modules Will Be Factory-Produced With The Necessary Documents Certifying Their Origin And Production Control, With The Necessary Guarantee For Their Purification Effect. Wastewater From The Village Of Veselinovo Is Brought To The Wwtp Site By A Pressure Pipeline Filled With Pe-Vp F110/6 Pipes. The Pressure Pipeline To The New Wwtp Will Be Laid In A Trench. For The Uniform Supply Of Waste Water To The Treatment Facilities Of The Inlet Pipe, A Dn100 Shut-Off Valve Will Be Installed At Each Facility. At The Entrance To The Treatment Facility, The Water Will Enter A Receiving Sedimentation Tank, Which Serves For The Mechanical Treatment Of Wastewater And Is Also A Sludge Tank At The Same Time. All Types And Quantities Of Construction And Assembly Works Are Specified In R. Ii Description Of Types And Quantities Of Cmp From The Technical Specification, An Integral Part Of The Participation Documentation.

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