Nine storey residential building - Water supply and sanitation

Contents

1 General data

1.1 Initial

1.2 Description of site plot plan. Characteristics of sanitary equipment

2 Internal water supply

2.1 Selection of internal water supply system and diagram

2.2 Hydraulic calculation of internal water supply network

2.3 Determination of the required head at the entry into the building

3 Internal sewers and drains

3.1 Selection of internal sewage system and diagram

3.2 Determination of calculated consumption of domestic effluents

3.3 Calculation of sewage networks

3.4 Yard sewage system

3.5 Drains

4 List of literature

5 Appendix

Description of site plot plan.

The designed building - a residential 9 storey building has a simple shape in plan, with dimensions in axes of 36x14.4m

The land surface of the site has a slope towards the projected passage, on which street communications are located.

The water supply of the building is from the city water supply system, which runs east of the building. Entry into the building is located in the price-tral part of the building. On the main lines there is a connection of watering cranes. Drainage of sewage from the building takes place in the street sewage network, removal of atmospheric precipitation to the pavement of the building.

1.3 Characteristics of sanitary equipment.

Each apartment has: a toilet with a low flush barrel; bath with washbasin. A wash is installed in the kitchen.

2 Internal water supply.

2.1 Selection of internal water supply system and diagram.

The water supply system of the building is assigned on the basis of the initial data and instructions SNiP 2.04.01 - 85 "Internal water supply and sewerage of buildings": for a residential building - household drinking water. According to the operating mode, the internal water supply system is assigned depending on the value of free head in the city water supply network and the required head at the inlet to the building Ntr = 45.3 m > Ngar = 42m

In this case, the required head is larger than the guaranteed head, therefore, it is necessary to install a booster pump. Based on the pump manufacturer's catalog, we will accept the "Grundfos UPS" type pump. Since we have a residential 9-storey building in which a ring network device is not required, we accept a dead end network diagram connected by one input to the external water supply, with the upper wiring of the main. We lay highways at 1.8 from the basement floor, with a slope towards the entrance. Risers are located in the premises of sanitary facilities, next to the toilet in special sanitary units. To ensure the supply of water to the most remote points of the water collection along the shortest path, we have an entry into the price-tral part of the building. Steel pipes of 100mm diameter are used for entry. Entry is performed with slope from building 0,003 and with depth of laying at 0, 5 m below depth of ground freezing (1, 90 m) equal to 1.90 + 0.5 = 2, 4 m. Vertically, the water pipeline inlet is located above the sewage pipes by 1.4m, horizontally between the water pipeline inlet and the sewage outlet 11.4m. At the points of connection of the input to the city water supply, a water supply well of reinforced concrete elements is arranged. The main pipeline and all horizontal sections are laid with a slope of 0.003 towards the inlet for water drain from the system during repair. At the base of each riser near the branch from the main, a shutoff valve is provided, as well as in front of flush tanks, watering cranes. At an altitude of 0.3 m. from the pavement in the wall niche to the main line, watering cranes with a diameter of 25mm are connected at the rate of one crane per section of the building. The branch to the watering crane is equipped with a shutoff valve and a T-joint with a plug in case of shutoff of the crane in winter.

Internal sewers and drains.

3.1 Selection of internal sewerage system and diagram.

Internal sewage systems are designed to drain domestic wastewater from household appliances from buildings to external sewage networks. The internal sewerage network consists of sewage receivers, drain pipelines, risers, main pipelines and outlets from the building

A hydraulic seal is structurally provided on each sanitary and technical device.

Waste water discharge with a diameter of 100mm is usually carried out by gravity, therefore sewage networks are laid with a slope of 0.03 to the riser. On risers in the basement and after 3 floors, at a height of 1 m from the floor, revisions are installed so that it is possible to clean the pipe on both sides, they are tightly closed by bolted covers. Cleaners are installed in each apartment near the 1st device, when the direction of flow of drains changes, at each turn .

Connection of the building outlet to the designed city sewerage system is carried out "silk-to-silk," with this method of connecting pipes in wells, their upper generatrices have one elevation, and tray elevations differ by the difference in diameters of these pipes. To drain waste water into the yard sewage network, one internal sewage outlet is arranged. At the points of connecting the outlets to the yard network, inspection wells with a diameter of 1000 mm are arranged. The sewer network and risers d = 100mm are made of cast iron pipes, the connection of which is made using a bell (sealed with sealant ).

Yard drainage networks

The yard network serves to connect the sewage outlets with the street network. It is made of ceramic pipes GOST 694298, diameter 150mm and 200mm. Pipelines are laid parallel to buildings so that the direction of flow of drains coincides with the slope of the terrain. Since the deepening of the city well is much larger than the yard, in order not to deepen the yard sewer at a distance of 1,52,0 m from the red line, a control well is installed, in which a difference in concrete spill is established up to 0.5 m high in the form of an open tray (open drop). Connection to the external network is made to the city sewage well. To control the operation of the network and its cleaning, it is provided for the installation of inspection wells with a diameter of 1.0m: at the points of connection of the outlets, at turns, at the places of change of diameters and slopes of pipes, in straight sections at a distance of no more than 35.0 m. The distance from the building wall is taken to be 3.0m, so that during earthworks do not damage the base of the building .

The calculation of the sewage yard network is carried out on the basis of the network route depicted on the plot plan. The purpose of the report is to determine the diameters, slopes and depth of sewage pipes. Based on this calculation, using data on ground surface elevations, on the depth of ground freezing and the depth of urban sewage, a profile of the yard sewage network is built.

During the calculation, the slope should be selected so that the deepening of the pipes is minimal, with a pipe diameter of 150mm within the range of 0.0080.015 towards the street header. It shall ensure the flow of waste water at a rate of not less than a self-cleaning 0.7 m/s, with an appropriate filling of 0.3 to 0.7.

This calculation shall be made in the following table:

The calculation requires a definition of:

-the initial elevation of the ground surface, horizontally on the plot plan;

-Tracing of the pipe tray at the end of the section, since the entry of trays in the wells is performed above the silk of the supply pipes;

-the depth of laying at the beginning of the section, which is laid above the freezing depth.

Based on this calculation, using data on ground surface elevations, on the depth of ground freezing and the depth of urban sewage, a profile of the yard sewage network is built.