Example of coursework
The task of design: to design cold pipeline and sewerage of building by the following input data: 1) a purpose of building- residential building: 2) a general plan of construction site with engineering networks-fig. 3.67; 3) a storey plan of a typical section with sanitary- technical instruments - fig. 3.68; 4) a number of sections - 2; 5) a height of storeys-2, 8 m; 6) a height of basement - 2.8 m; 7) an availability of centralized hot water supply (an absence of water heaters in apartments); 8) the number of storeys- 5; 9) the number of inhabitants -180 humans;
10) the absolute marks: of the floors of the first storey - 87,000 (± 0,000), of a top of the street pipeline -84, 400, of tray of street sewerage network, to which allowed the connection of yard network is allowed -83, 100; 11) guaranteed pressure in the pipeline network - 40 m.
Fig. 3.67 A general plan of construction site with engineering networks
Fig. 3.68 a storey plan of a typical section The system of cold water supply of building
For supply water on economic-drinkable needs we design the separate systems of hot and cold of economic-drinkable water supply in residential 5-storeys building. For watering of the green areas and sidewalks around the building we anticipate the watering taps which we design in niches of the exterior walls and connect to main lines of internal cold pipeline.
Water supply network of building-is dead-end, with the lower dilution. The main lines we design in the basement at a height of 0.4 m from the ceiling. Highways heat insulate by mats of mineral wool to prevent formation of condensate on the surface of the pipes. Laying of pipes and supplying to instruments are open.
Water supply network of building is designed with help of steel galvanized water and gas conductive pipes Building Code 3262-75 *. For water pumping mixers are anticipated, since system of hot water supply is designed in building. To control the flow of water on network of water supply we design the installing locking and regulating valves: in the water gauge nodes; on branches from highway to the risers, to the watering valves; on input in each apartment; before drain tanks (fig 3.70).
We design one input of pipeline. Thrace of input we bring on master plan of site. Since the input crosses the sewer and locates below (install in subsequent calculations), we design the input from cast iron pipes Building Code 9583-75 and we concludes the input in container in places of intersection with sewage.
To account for water consumptions we design water counters: general-in the basement at the input in residential building; in each apartment - on the supplies in each flat.
Calculation of internal water supply networks
The calculation was carried out by Building Norms and Rules 2.04.01-85. Estimated seconds expenses of water is defined by (2) and (3) Building Norms and Rules at:
;
(addition
3, Building Norms and Rules).
The probability of simultaneous actions of sanitary devices in the building:
Product
(addition
4).
Cost of cold
water at the input
;
Hour water expenses:
where =
(addition
3, Building Norms and Rules );
Average
daily expenses of cold water in the building:
Where
(addition
3, Building Norms and Rules).
Hydraulic calculation of internal water supply network we bring in table form (table 3.3). By consumptions of water on each site of calculation direction (fig.3.70) on the tables for hydraulic calculation we take diameter of pipes, speed of movement of water in pipes and specific expenses of pressure on friction [18]. At this the speed of movement of water in pipes-0,9-1,2 m/sec is recommended, the maximal speed-3 m/sec. Results of calculations calculated shown in Table 3.8.
Fig. 3.69 Plan of understorey with the networks of water channels
Fig.3.70 Axonometric scheme of water pipeline b1
Calculational site |
Probability of action, P |
Number of devices, N |
PN |
α |
Calculation expances of water |
Diameter of pipe, mm |
Speed of motion, V, m/sec |
Length of the site, l, m |
Pressure looses |
|
1000i |
on the site H=il(l+kl), m |
|||||||||
1-2 |
0.12 |
2 |
0,024 |
0,224 |
0,22 |
15 |
1.3 |
1.1 |
440 |
0,48 |
2-3 |
0,12 |
3 |
0.036 |
0.249 |
0,25 |
15 |
1,47 |
0,5 |
560,4 |
2.8 |
3-4 |
0,12 |
4 |
0,048 |
0,27 |
0.27 |
15 |
1,59 |
5,2 |
660 |
3.43 |
4-5 |
0.12 |
8 |
0.096 |
0.338 |
0.34 |
15 |
2 |
3 |
1038 |
3.11 |
5-6 |
0,12 |
12 |
0,144 |
0,393 |
0,39 |
20 |
1.22 |
3 |
253 |
0.76 |
6-7 |
0.12 |
16 |
0.192 |
0,441 |
0,44 |
20 |
1.37 |
3 |
322 |
0,97 |
7-8 |
0,12 |
20 |
0.24 |
0,485 |
0,48 |
20 |
1,53 |
7,4 |
381 |
2,82 |
8-9 |
0,12 |
40 |
0.48 |
0,652 |
0,65 |
25 |
1,21 |
0,6 |
180,7 |
0,11 |
9-10 |
0,12 |
55 |
0,66 |
0,779 |
0,78 |
25 |
1.46 |
0,3 |
260 |
0.08 |
10-11 |
0.12 |
60 |
0.72 |
0,815 |
0.82 |
25 |
1.54 |
5,9 |
287 |
1,69 |
11-12 |
0.12 |
120 |
1,44 |
1,186 |
1,19 |
32 |
1.24 |
5.4 |
130 |
0,7 |
Move in |
0,12 |
120 |
1,44 |
1,186 |
1.19 |
65 |
0,69 |
42 |
18.4 |
0,77 |