Water supply and sewerage of 25 storeys

Contents

1. Brief description of the object

2. Scope of work. 3. General part

4. Domestic-drinking and fire-fighting water supply

5. Hot water supply

6. Booster pump stations

7. Domestic sewage system

8. Storm sewer

9. Energy saving

10. Water basin protection measures

11. General requirements for installation, commissioning and maintenance. Health, Safety and Fire Safety Measures

12. Balance of water consumption and water disposal

13. Table of estimated water and effluent flow rates

1. Brief description of the object.

The designed object is a monolithic 25-storey 3-section residential building with built-in non-residential premises of the 1st floor and an underground parking lot, namely:

• Elevation 2,100: technical sub-field;

• Floor 1: administrative and office premises, retail premises;

• Floors 2 to 25: living quarters;

• Floor 26: technical floor.

2. Scope of Work

The design solutions described in this book include the following:

• Internal cold and hot water supply

• Domestic sewage system

• Storm sewer

• Drainage of water from accidental spills in technical rooms (conventionally clean drains)

• Fire water supply

• Drainage from parking lot

The following sections are outside the scope of this book:

• External and on-site networks.

• Automation and selection of pump units of domestic drinking and fire-fighting water supply 1 and 2 zones and underground parking.

3. General part

The water supply and sewerage project of the monolithic 25story 3-section residential building No. 56 with built-in non-residential premises of the 1st floor and an underground parking lot is made on the basis of:

- architectural and planning solutions of the building;

- technological tasks;

and in accordance with the requirements of the existing rules and regulations:

- SNiP 2.04.0185 * "Internal water supply and sewerage of buildings"

- SNiP 3.05.0185 * "Internal sanitary and technical systems"

- SNiP 2.08.0289 * "Public buildings and structures"

- SNiP 2.09.0487 * "Administrative and domestic buildings"

- SNiP 31012003 "Apartment buildings"

- SNiP 210299 * "Parking"

And all reference documents specified in the above regulations.

The following water supply and drainage systems are designed in the multifunctional building:

- water supply of cold water of domestic drinking water zone I (B1.1);

- water supply of cold water of domestic drinking water zone II (B1.2);

- water supply of cold water of household drinking water of the 1st floor (B1.3);

- Zone I fire water supply (B2.1);

- fire-fighting water supply of zone II (B2.2);

- water supply system of hot water I of a zone (T3.1);

- hot water supply of zone II (T3.2);

- water supply system of hot water of the 1st floor (T3.3);

- hot water supply of circulation zone I (T4.1);

- hot water supply of circulation zone II (T4.2);

- water supply of circulating 1st floor hot water (T4.3);

- domestic sewerage system (K1);

- pressure sewer (K2n) for removal of water from pits during maintenance of equipment in ITR, pump station;

- Internal runoff (K2);

- drainage from the parking lot (K2.1);

- drainage pressure head (K2.1n) for removal of water from priyamk of parking.

4. Domestic-drinking and fire-fighting water supply

The water supply of the residential building is carried out by 2 designed inputs d200 mm. The external water supply lines from the manifolds specified in the technical conditions to the inputs to the building are designed in the external water supply section.

A water metering unit with a turbine counter on the main line is installed at the inputs behind the first capital wall of the building from the side of the city water supply line, in an isolated room heated and having lighting. Water metering unit is equipped with magnetic filter, disconnecting valves, check valves and bypass line. The bypass line is equipped with an electrified gate valve of the type "30ch906br" of Russian production.

Guaranteed head in the existing external water supply network - 10 m.vod.st.

Separate ring systems of drinking and fire water supply are designed in the building (SNiP 2.04.0185 * item 9.1). Main water supply network and risers are provided from steel galvanized pipes as per GOST 326275. Main pipelines and risers are laid in isolation from moisture condensate. Insulation is provided from hard-burning, non-combustible materials (Thermaflex Pipe Insulation).

For watering the area adjacent to the building, the project provides for the installation of watering cranes in the niches of the external walls 70 m along the perimeter of the building. Diameters of watering cranes - 25 mm.

Water sprinkler sprinkler is installed in garbage chambers.

For flushing, cleaning and fire extinguishing of trash ducts, the design provides for supply of cold and hot water to the control cabinet of the unit for fire extinguishing and flushing of trash ducts in each section.

The water supply of the building is carried out in 2 zones. Booster pump units are designed in the technical subpole (performed by a separate project).

The first zone provides water supply to residential floors from 2 to 11.

The second zone provides water supply to residential floors from 11 to 25.

The supply of the design water flow rate with the required head to the khoz-drinking and fire-fighting needs of the 1st and 2nd zones is provided by increasing pumping units of the Hydro MRS type from Grundfos.

Cold water meters in each apartment on all floors are installed on branches to apartment supplies.

Each apartment provides for the installation of an indoor fire crane complete with a flexible hose and sprayer.

Water supply of zone 1 is provided with lower wiring from the main pipeline located in the basement, water supply of zone 2 - with upper wiring, with supply of cold water to the technical floor, along the main supply riser in each section from the main pipeline located in the basement. On the branches from the risers from 2 to 11 floors, the installation of pressure reducers is provided in those places where the pressure exceeds 45 m of water column.

Stabilization of pressure upstream sanitary devices to values not exceeding 2 atm is provided by Honeywell pressure reducers.

Independent water supply lines of public premises and residential area have been designed for the convenience of network operation.

Fire cabinets are installed in easily accessible places. Fire cranes are equipped with sleeve coils with hoses 20 meters long and fire barrels 50 mm in diameter. The company is the manufacturer of fire cabinets - NPO Pulse.

Internal mains and fire risers are installed from steel water and gas galvanized pipes with a diameter of 50100 mm according to GOST 326275.

The internal fire extinguishing system of the underground parking lot is being developed by a separate project.

5. Hot water supply

GVA system - from heat exchangers in ITR. The complex provides a dual-zone WAN system with circulation circuits. GVA subdivisions to instruments, less than 5 meters long - dead end.

The main network and risers are provided from steel galvanized pipes as per GOST 326275. To prevent temperature deformations of pipes on risers and in extended straight sections, compensators with a device of fixed and sliding supports are provided. Main pipelines and risers are laid in heat insulation. Insulation is provided from hard-burning, non-combustible materials (Thermaflex pipe insulation).

Hot water supply of the building is carried out in 2 zones.

The first zone provides hot water supply to residential floors from 2 to 11.

The second zone provides hot water supply to residential floors from 11 to 25.

Hot water meters in each apartment on all floors are installed on branches to apartment supplies.

GVA circulation pumps are installed in ITP. Selection of pumps, the scheme of their binding and location are shown in the section "OV ".

The GVA system of zone 1 is carried out with lower wiring from the main pipeline located in the basement, GVA of zone 2 - with upper wiring, with the supply of hot water to the technical floor, is carried out by the main supply riser in each section from the main pipeline located in the basement. On the branches from the risers from 2 to 11 floors, the installation of pressure reducers is provided in those places where the pressure exceeds 45 m of water column.

For the convenience of operation of the networks, independent highways of hot water supply for public premises and residential area have been designed .

7. Domestic sewage system

The discharge of domestic effluents is carried out into the street sewage line and existing wells.

Waste water is discharged through 150 mm outlets.

Effluent ventilation is carried out using exhaust risers, which are discharged 0.3 m above the roof of the designed building.

Internal sewer networks shall be mounted of 110 mm diameter polyethylene pipes. Plumbing piping - polyethylene pipes with a diameter of 50110 mm.

Horizontal branch pipes from sanitary devices on the floors are laid hidden.

On risers it is provided to install revisions at a height of 1 m (center from floor level), according to SNiP 2.04.0185 *.

On the technical floor (26th floor), the sewage risers are combined into a common ventilation riser, which can be brought to the roof through a prefabricated ventilation shaft.

8. Storm sewer

Rain drains from the roof of the building are conditionally clean drains by nature, no specific contaminants contain and do not exceed MPC

Rain sewer networks are provided from polyethylene pipes with a diameter of 150 mm. Drains are discharged to the storm sewer network and existing wells.

As rain receivers from roofs, rainfall funnels with electric heating HL 62.1B Manufactured by Hutterer & Lechner GmbH are used.

Random wastewater in the industrial sub-field of the residential building is removed by pumping units with receiving tanks located at elevation 2,100. Pump units - Grundfos (1 working in each pit, 1 standby in passive reserve). For automatic control of operation from water levels in pits, submersible pumps are accepted with complete supplied float switches.

Accidental wastewater, as well as water from the operation of the fire extinguishing system of the underground parking lot, are removed through the ramps at elevation 3,500 and along the intercepting trays at elevation 6,000 to the pits where pumps are provided. Pump units - Gnome (1 working in each pit, 1 standby in passive reserve). For automatic control of operation from water levels in pits, submersible pumps are accepted with complete supplied float switches.

Accidental waste water disposal of the parking lot is carried out

9. Energy saving

In order to save water, the project provides for new water-saving plumbing fittings.

A water metering unit is provided at the water supply input to the building, hot water supply networks are connected to the ITP through hot water meters.

Application of frequency control in the scheme of operation control of the booster pump unit of the farm-drinking and production water supply ensures maintenance of constant values of pressure in the system. The use of floor-by-floor pressure regulators allows to reduce the total level of water consumption during unfixed water extractions.

All piping shall be insulated from heat loss.

10. Water basin protection measures

Water supply sources and wastewater discharge conditions for the designed residential building are accepted in accordance with the specifications for water supply and drainage.

Water supplied to the building from the city water supply line meets the requirements of GOST 287482 (SanPiN 2.1.4.107401) and can be used by all consumers without local cleaning.

All wastewater discharged from the designed building into the city sewage network is household or close in composition to household water with contamination content within the MPC allowed for admission to the city sewage network.

There are no discharges of aggressive and chemically contaminated waste water from the designed facility.

The absence of discharges of contaminated industrial wastewater into domestic sewage and contaminated surface wastewater into rain sewage meets environmental requirements.

The solution of issues and the implementation of measures of the general sanitary direction ensures the environmental safety of the office building.

The environmental protection section is developed by a separate project.

11. General requirements for installation, commissioning and maintenance. Health, Safety and Fire Safety Measures.

Installation and acceptance of water supply and sewerage systems is carried out in accordance with SNiP 3.05.0185 "Internal Sanitary and Technical Systems," as well as instructions and recommendations for installation of manufacturers and equipment suppliers.

The project for the installation of water supply and drainage systems is being developed by the installation organization with the involvement of equipment suppliers.

Contractor and Owner are responsible for the development of measures for all types of works.

Installation works on water supply and water disposal systems shall be carried out taking into account occupational safety standards, safety rules and fire safety requirements.

Any deviations from the project arising during installation works shall be agreed with the project developers.

Structural drawings of sealing of pipelines passing through the structures of the building shall be accepted according to the album PP1613 ed. Mosproekt1 and SP4010196.

Fasteners of steel pipe risers and distance between fasteners are accepted in accordance with paragraphs 3.4 and 3.5 of SNiP 3.05.0185; plastic pipes - as per SP 4010196.

After the installation of equipment and pipelines by the construction and installation organization, an external inspection, strength and tightness tests should be carried out and acceptance acts should be drawn up in accordance with the current regulatory requirements.

Hydraulic tests shall be performed prior to execution of heat insulation coatings of pipelines, in sections of hidden gasket - prior to sealing of pipelines. Defects detected during the tests shall be rectified and repeated.

When performing all types of works it is necessary to comply with the provisions of VSN 47886 "Production documentation for installation of process equipment and process pipelines."

Hydraulic tests of the system of domestic and industrial fire-fighting water supply shall be carried out with installed water discharge valves.

After testing, protective coating, painting and insulation of pipelines and equipment are performed. Steel structures and sections of water supply from steel pipes shall be protected with anti-corrosion coatings.

Lines and risers of cold and hot water supply (except for water discharge devices) are covered with thermal insulation of THERMAFLEX type.

Tests of internal sewage systems shall be performed before their closing by water spillage method by simultaneous opening of 75% of sanitary devices connected to the inspected area during the time required for inspection, with preparation of a concealed works inspection certificate.

Complex commissioning of water supply and sewerage systems is performed after the complete completion of installation works and is completed by drawing up certificates of the appropriate form and preparing for commissioning of the systems.

Operation of water supply and sewerage systems shall be carried out in compliance with all existing technical operation rules and documents regulating the maintenance of water supply and sanitation systems in the Russian Federation.

Persons who have reached the age of 18, have undergone medical examination and industrial training are allowed to work on the maintenance of water supply and sewage systems. Approved specialists are subject to mandatory instruction in safety, health and fire safety.