Improvement

The project documentation provides for the reconstruction of the water supply network along the avenue from the avenue to the street. The route of the reconstructed water supply network runs in the carriageway of the avenue. with the device of pits in the carriageway and longitudinal laying in the carriageway on the right (odd) side in the area from house 1 to the avenue. Branches for connecting the existing network are provided in sidewalks and lawns. After performing work in the zone of carriageways and sidewalks of streets, it is planned to restore road structures with milling and overlapping with the top layer of asphalt concrete 2 meters beyond the boundaries of the trenches. It also provides for the restoration of sidewalks and lawns after the dismantling of the wells of the existing network. Roadway structures (980,7 m2): fine-grained dense asphalt concrete type A grade I GOST 9128-2009, - 5,0 cm; asphalt concrete coarse-grained dense type A grade I GOST 9128-2009, - 8,0 cm; coarse-grained porous asphalt concrete grade 1, GOST 9128-2009, - 8,0 cm; rubble granite brand 1200 fr. 40-70 with gusseting, according to GOST 8267-93 - 28,0 cm; fine sand, class 1, Kf≥3m/day, GOST 8736-93* - 70,0 cm. Sidewalk structures (131,0 m2): hot sandy dense asphalt concrete type G grade II, GOST 9128-2009 - 3,5 cm; hot sandy highly porous asphalt concrete grade I, 9128-2009 - 4,0 cm; rubble granite brand 1200 fr. 20-40 with gusseting, according to GOST 8267-93, - 15,0 cm; fine sand, class 1, Kf≥3m/day, GOST 8736-93* - 30,0 cm. Landscaping provides for the restoration of: lawns on an area of ​​2740 m2 with the introduction of a vegetative layer of 20 cm; printed coverings on an area of ​​5m2. rubble granite brand 1000 fr. 3-10, according to GOST 8267-93 - 4,0 cm; rubble granite brand 1000 fr. 20-40, according to GOST 8267-93 - 14,0 cm; fine sand, class 1, GOST 8736-93 *, - 30,0 cm.

Engineering equipment, utility networks, engineering activities

The design documentation provides for: reconstruction of a steel water pipeline d=820-920 mm along the avenue from the avenue to the street from polyethylene pipes d=800x47,4 mm, D=900x53,3 mm with connection to existing steel pipes d=1020 mm and d=1220 mm ; reconstruction of steel lintel d=920 mm from polyethylene pipes D=900x53,3 mm; connection of an existing polyethylene branch d=529 mm with designed polyethylene pipes D=500x29,7 mm; reconstruction of the existing steel spillway d=600 mm from polyethylene pipes D=630x37,4 mm. Most of the work is provided by a closed method using horizontal directional drilling in the roadway. When crossing existing sewer pipelines, polyethylene cases D = 1200x71,1 mm are provided in an open way. At the intersection with tram tracks, a polyethylene case D = 1200x71,1 mm is provided by a closed method using the horizontal directional drilling method. At lower crossing points, water outlets D = 400x23,7 mm were designed with the installation of reinforced concrete wells to monitor the condition of the working pipe and collect water in case of a breakthrough. With a closed method of work, the installation of polyethylene pipes and cases "Protect" PE 100-RC SDR 17 according to GOST 18599-2001 with a protective coating according to STO 73011750-004-2008 is provided. With the open method of production, polyethylene pipes and cases "Multipipe 2" PE 100-RC SDR 17 were designed in accordance with GOST 18599-2001. The design documentation includes the following fittings: flange gate valves PN 10 D=400 mm, D=600 mm; gates PN 10 D=500 mm, D=800 mm, D=900 mm; fire hydrants in a wellless version with a side valve D=100 mm. Wells d = 1,5 m, d = 2,0 m are provided on the water supply network from prefabricated reinforced concrete elements in accordance with GOST 8020-90. The design documentation provides for the dismantling of existing water supply networks by flushing pipes with cement-sand mortar, as well as the dismantling of existing reinforced concrete wells and fittings. The construction of the trench and pits is provided taking into account the data of engineering and geological surveys with the construction of a base of 200 mm and a backfill of 500 mm above the top of the sand pipe. Further, backfilling is carried out in lawns with soil, in the carriageway to the bottom of the road structure - with sand. Before putting the water pipeline into operation, it is planned to flush and disinfect pipelines by chlorination, followed by rinsing with water. The project documentation provides for the removal of the contact network outside the scope of work on the reconstruction of the water supply network D800-900mm in three sections: 1. Reconstruction of the contact network at the intersection of the street and the avenue; 2. Reconstruction of the contact network at the intersection of the avenue and the street; 3.