Design method of villa drainage system key points of villa drainage design

The focus of villa design is to grasp the function and style. Due to the large villa area, many people think that the function should not be a problem, which is actually a misunderstanding. Due to the limitation of architectural design, the utilization rate of villa area is often uneven, and the space often used sometimes seems cramped, while some are rarely involved. Let's talk about the design method of villa drainage system and the main points of villa drainage design.

Design method of villa drainage system;

1. Building water supply project refers to the delivery of water that meets the water quality standards to all water points in the domestic, production and fire water supply systems to meet the requirements of water quantity and water pressure. Compared with the water supply project of garden houses, tap water closely related to people is sent to people's kitchens, bathrooms and other water points through pipelines.

2. So how can tap water be delivered to thousands of households with good quality and quantity?

Below we elaborate from four aspects: water consumption and measurement, water pressure and pipeline laying of garden houses:

The first thing to know is how to meet people's daily water use. According to Table 3. 1.9 of Code for Design of Water Supply and Drainage in Buildings, the water quota of garden houses can be determined by referring to the categories with relatively high water quota of ordinary houses, according to the setting standards of indoor sanitary appliances, plus public building water, greening and road sprinkling water, public facilities water, unforeseeable water and water leaking from pipe networks. Therefore, we can know the maximum daily and hourly water consumption of the whole community. The water meter problem of garden houses is also more complicated than that of multi-storey buildings.

In the past, old water meters were often considered to be located indoors, which not only increased the workload of meter reading, but also greatly reduced the safety and privacy of houses. Therefore, water meters in multi-storey buildings are usually located outdoors. Usually, the water meter is located in the outdoor tube well, and the water meter is concentrated on the ground floor or each floor, and the water supply branch pipes of each floor are laid in the tube well. Whether to use a remote water meter depends on the specific situation. The advantage of remote water meter is that it can save a lot of manpower to accurately read the meter, but the disadvantage is high cost. Garden houses with perfect property management can use remote water meters, which is the direction of application and development of water meters in the future.

The second consideration is water pressure. Because garden houses are mostly multi-storey buildings, in areas where the municipal water supply network is relatively perfect, the pressure water supply of the municipal water supply network can be directly used. If the water supply pressure provided by the municipal water supply network cannot meet the requirements, the water storage regulation or pressurized water supply scheme can be selected according to the principles of hygiene, safety, economy and energy saving. Because the water in the high-level water tank and pool is easy to be polluted after long-term use, no negative pressure water supply system is adopted to pressurize the water supply network when conditions permit.

Although the non-negative pressure water supply system can make full use of the pressure of urban pipe network and save energy greatly; Avoid secondary pollution to water; Save floor space; Convenient maintenance; The operating cost is low, but its disadvantages are equally prominent, because there is generally no negative pressure water supply and no water tank. Although water can be stored, the amount is very small. Once the water supply network is cut off, users will have no water at any time; Moreover, non-negative pressure water supply equipment can easily reduce the pressure of municipal pipe network. Only when the municipal pressure is sufficient and approved by the relevant municipal units can the non-negative pressure water supply equipment be adopted. In view of the problem that non-negative pressure water supply equipment cannot store water, we can set up non-negative pressure water supply equipment, a domestic water storage tank and a group of variable frequency pumps in the domestic water supply pump room. When the municipal water supply stops, the variable frequency pump unit will pump water from the water tank and supply it to the non-negative pressure water supply equipment, and then supply water together with the non-negative pressure water supply equipment.

Whether it meets the municipal pressure or not, the variable frequency pump unit pumps water regularly every day, which can ensure the water in the water tank to be updated in time, which is conducive to the stability of water pressure during the peak hours of water use. For garden houses with relatively high quality, the above methods can also be used to ensure water quantity and water pressure.

Structural design of villa drainage system;

The stages of structural design can be roughly divided into three stages, namely, structural scheme stage, structural calculation stage and construction drawing design stage. According to the importance of the building, the seismic fortification intensity of the building location, the engineering geological survey report, the building site category and the height and number of floors of the building, the structural forms of the building (for example, brick-concrete structure, frame structure, frame-shear structure, shear wall structure, tube structure, mixed structure, etc.) are determined. , and the structural form composed of these structures). After the structural form of villa drainage system is determined, the bearing system and stress components of the structure should be arranged according to the characteristics and requirements of different structural forms.

First, the calculation of load. Loads include external loads (for example, wind load, snow load, building load, groundwater load, earthquake load, civil air defense load, etc. ) and internal loads (such as structural deadweight load, service load, decoration load, etc. ). The calculation of the above load should be based on the requirements and provisions of the load specification, and different combined value coefficients and quasi-permanent value coefficients should be used for combined calculation under different working conditions.

Second, the trial calculation of components. According to the calculated load value, the requirements of structural measures, the use requirements and the trial calculation methods recommended by various calculation manuals, the section of the component is preliminarily determined.

3. Internal force calculation, including bending moment, shear force, torque, axial pressure and tension, etc. , according to the determined component section and load value.

Fourth, the calculation of components. According to the calculated internal force of the structure and the requirements and restrictions of the code on members (such as axial compression ratio, shear span ratio, span-height ratio, cracks and deflection, etc.). ), check whether the components of structural trial calculation meet the requirements and requirements of the specification. If it does not meet the requirements, the section or layout of the parts should be adjusted until it meets the requirements.

Key points of villa drainage design

I. Drinking water

Villa decoration generally chooses water purifier or multifunctional water machine. Daily water directly related to drinking water (including living room drinking water, kitchen drinking water, bathroom bath water, water for wading household appliances, etc.). ) The water treatment demand of villa decoration can be met by the soft water system and the water purification system as a whole. Central water softener: installed on the main water pipeline to remove water, alkali and scale. Protect household appliances related to water, such as heating system, central air conditioner, water heater, washing machine, coffee machine, electric iron, etc. Central water purifier: installed in the main pipeline to purify the whole house. Remove impurities such as sediment, rust, suspended solids, bacteria and viruses from water. Kitchen water purifier: installed under the cupboard basin, it deeply removes sediment, rust, bleaching powder, suspended solids, bacteria and viruses, chemical pollutants and heavy metal pollutants. Used for boiling water, cooking, making soup, washing fruits, washing face and brushing teeth. Pipeline machine: installed in living room, bedroom and study room for direct drinking.

Second, the domestic water supply

General domestic water supply includes daily domestic water, hot water and swimming pool water. Intelligent pipe network direct water supply device is generally used to treat domestic water for villa decoration, and the optimal water supply can be set according to the maximum water consumption quota.

1. Maximum daily water consumption estimation: including water consumption quota for guest rooms, restaurants, laundry, leisure showers, entertainment, etc. Villa customers can make rough estimation according to their usual needs, and communicate with hydropower designers in detail to make reasonable solutions for villa water treatment.

2. Hot water system: Hot water generally involves guest room water, heating, leisure center and heated swimming pool. The places to be estimated include the heat consumption of guest rooms, showers, saunas, heat of vaporization loss of swimming pool water surface, conduction heat loss, conduction heat loss of pool wall and bottom, and pipeline heat loss. Calculate the total heat demand in detail according to the needs, so as to deal with the hot water system reasonably in the later stage. The heat source of hot water system for villa decoration is generally gas boiler, and each water point uses volumetric water-water heat exchanger to supply water, and different groups of heat exchangers are used according to different functions, which is convenient for management. In addition, leisure centers and swimming pools should reserve equipment rooms and pipe joints.

Third, fire water supply

1, fire hydrant water supply

The fire protection system for villa decoration is very important. Hydropower design must reserve enough water for fire hydrants. There are generally two outdoor fire hydrants. The water consumption of indoor fire hydrant is about 1.5l/s, and the fire duration is 2h. The water consumption of fire hydrants in the pool is 1.08 m2 ... The water supply mode of indoor fire hydrant water supply system generally adopts the combined water supply mode of water pump and water tank, and a fire water tank is set on the roof, and two multistage fire pumps with stable pressure and buffer are required, one for use and one for standby. Water supply for fire hydrants is generally handled reasonably by hydropower designers according to the apartment type, area and pattern of villas, and the water consumption is estimated.

2, automatic sprinkler system

The roof of automatic sprinkler system generally adopts large plate design without secondary beams, with design flow of 33L/s and fire duration of 1h, and the fire pool should reserve 120m2 of spray water. Automatic sprinkler feed pumps are generally two multi-stage fire pumps with stable pressure and buffer, one for use and one for standby.

Fourth, the drainage system

Drainage system is an important part of villa decoration water treatment system. In the design of water supply and drainage, possible changes must be fully considered, carefully analyzed and studied, and reasonable values should be provided to meet the requirements of various aspects and codes. Generally, the basement is drained by pressure, and the rest by gravity. The drainage system drains sewage and garbage, and the sewage is collected and treated by septic tank and discharged into the sewage pipeline of the community. Villa drainage, fire water should be discharged in time, at the same time to prevent flammable substances (such as oil) from flowing to other areas, affecting the safety of other areas. In general, boiler and fire water should be discharged from closed water-sealed wells. In addition, in leisure and entertainment places, the horizontal drainage pipe is relatively long, so an annular ventilation pipe must be set to balance the air pressure in the pipe and prevent the water seal from being damaged.

Summary: The relevant information about the design method of villa drainage system and the key points of villa drainage design is introduced here. I hope this article is helpful to everyone. If you still don't understand anything, you can leave a message for Bian Xiao below, and we will answer it for you as soon as possible.