Tenders Are Invited For River Regulation And Flood Control Works - Repair Of The Existing Correction Of The Vladaiska River From Ovcha Kupel Blvd. To The Existing Reinforced Concrete Correction At Slavia Stadium, Ovcha Kupel Area And Krasno Selo Area

River Regulation And Flood Control Works - Repair Of The Existing Correction Of The Vladaiska River From Ovcha Kupel Blvd. To The Existing Reinforced Concrete Correction At Slavia Stadium, Ovcha Kupel Area And Krasno Selo Area. The Existing Correction Of The Vladaiska River Planned For Repair Is About 260 M Long And Falls On The Territory Of The Ovcha Kupel District And The Krasno Selo District - Immediately After Ovcha Kupel Blvd. The Activities Related To The Repair Works And Improvement Of The Surrounding Space Include: • Restoration And Improvement Of The Technical And Operational Condition Of The Lining Of The River Bed; •Implementation Of A Safety Railing Parallel To The Retaining Walls Of The River Bed: •Removal Of Existing Vegetation And Improvement Of The Surrounding Space. The Repair Of The Wedge And Part Of The Berm With Reinforced Concrete Lining Will Be Carried Out In Sections. It Is Recommended To Do It From The Bottom Up (In The Direction Opposite To The Movement Of The Water). The Purpose Of The Bridge Repair Is To Form A New Reinforced Concrete Trough With Slopes Of 0.007 And 0.014, With A Double Trapezoidal Profile With Widths Of 1 M (At The Bottom) And 4.00 M At The Top. It Is Envisaged That The Rapid Stream At Km 216.37 Will Be Reconstructed As A Threshold With A Height Of H=0.65 M In Order To Improve The Hydraulic Discharge Conditions Of The Outflow Channels. The Rapid Flow At Km 0+140 To Km 0+160 Is Restored And Does Not Change The Hydraulic Picture. The Water Will Be Diverted In Three Repair Sections. The First Section Starts Immediately From The Existing Threshold (H=L .00 M) And Has A Length Of 93.00 M. In This Section, At A Distance Of 1.90 M From The Stone Retaining Wall, A Reinforced Concrete Retaining Wall With A Height Of 1.00 M Has Been Built. It Is Planned To Direct The Water Between The Two Retaining Walls With The Help Of Sandbags. At The Drain, The Water Is Channeled Into The Existing Culvert By Means Of Sandbags. At A Slope Of 0.0069 And A Fill Of 0.90 M, The Existing Culvert Conducts 5.80 Mz/S. In The Second And Third Sections, The Water Will Be Diverted With The Help Of New Jersey Road Barriers With Dimensions Of 70/73/200 Cm, Which Will Be Laid On The Left Berm At A Distance Of 3 M From The Stone Retaining Wall. The Lengths Of The Sections Are 80.00M And 93.00M, Respectively. It Is Planned To Channel The Water Using Sandbags. It Is Planned To Enter The Riverbed From A Built Technological Ramp. The Repair Of The Culvert Is Planned To Be Carried Out In Technological Sections With Lengths Of Up To 100 M. The Planned Activities For The Repair Of The Culvert And The River Berms Do Not Disturb The Outflow Of The Existing Outflow Channels. With The Repair Of The Wedge, The Elevation Of The Bottom Is Preserved. The Design Development Envisages A Complete Replacement Of The Wedge Along With 3.50 M On Both Sides Of The Berm, With A Newly Designed Reinforced Concrete One (According To The Existing Situation). The Dismantled Stones Will Be Used To Restore The Missing Stone Cladding. The Bottom Of The Trough Is Designed With A Trapezoidal Geometric Shape And A Thickness Of 20 Cm. It Will Be Built On A 10 Cm C10/12 Concrete Pad And A 20 Cm Ballast Cushion. It Is Particularly Important When Laying The Underlying Concrete To Achieve A Strong Layer. The Excavation Is Accepted By A Designer, Constructor And Geologist. The Wedge Will Be Reinforced With Steel Ribbed Bars N10 And N8