With the development of cities, there are fewer and fewer cities providing land, and the proportion of cars per capita in China is showing a significant growth trend. In order to solve more parking problems on limited land, the drains in the basement parking lot will become An integral part of a building. A basement parking lot is a building that is used to park various types of motor vehicles in the ground. It is mainly composed of parking spaces, passages, ramps or mechanical hoisting rooms, entrances, and shunting sites. When designing each basement parking lot, we must pay attention to the design of the drainage ditch. This article focuses on the selection suggestions and installation precautions for the basement parking lot drainage ditch.

Resin drainage ditch high load rating, drainage efficiency is very suitable for the basement parking lot, the basement parking lot drainage ditch setting is very important for garage drainage, especially for multi-storey car layers, setting should generally be based on the shape of the garage, rational layout, Therefore, while designing the direction of the drainage ditch in the basement parking lot, the number of submersible sewage pumps will be increased and the number of power supply and distribution systems and automatic control systems will be increased. At the same time, due to the setting of the resin drainage ditch, the bottom floor of the structural floor will be dug deep. Processing, while increasing the cost, also increases the workload and maintenance costs of future property management. When setting up the resin drainage ditch, the concrete thickness of the floor of the underground parking lot should be used as far as possible to arrange the resin drainage ditch. For example, the thickness of the basement parking lot is usually 500-600mm, and the distance between the upper and lower reinforcing bars and the protective layer is 250mm. There is also a space of 205-350mm, which allows the buried drainage pipe to pass through. This height should be used in the design. The slope of the buried buried pipe should be minimized as much as possible. The minimum design gradient of the buried buried pipe should be used to extend the length of the buried buried pipe. Expand the catchment area of catchment wells.

In the installation of drains in the basement parking lot, special attention should also be paid to the following points:

1. Every two resin gutters have a male and female trough design. There should be no settling seams, expansion joints or deformation joints in the water receiving area. According to the “Design Code for Building Water Supply and Drainage”, the drainage pipes in the building must not pass through the above slits. .

2. Each fire prevention zone must be equipped with a separate water collection well so as to avoid direct passage of the pipe through the fire prevention zone. Once a fire occurs, although the fire shutter blocks the two fire zones, hidden dangers are buried under the floor of the garage.

3. In the sheltered underground garage, the water collection wells should be set independently in each air defense unit. Drainage and direct-buried pipes should not cross the protection unit, and the direct-drainage pipes cannot pass through the human defense area and the non-human defense area.

4. The design of water collection wells The main collection wells mainly have the planar dimensions of collection, storage, and regulation of collecting wells. For underground garages, there are generally not many restrictions, as long as they can meet the requirements for submerged sewage pump installation and civil construction. With the operation of the template, the depth of the well can be divided into three parts:

4.1 Submerged parts: below the minimum water mark

For small-power submersible pumps, their motors have no water-cooled jacket cooling device, and rely on submerged sewage cooling, this part of the height is the submersible pump protection height, this value is generally specified in the submersible sewage pump specification for each model For a submersible pump of about 2.2kW, its height is about 300-400mm.

4.2 Adjustment section: effective height

Basement parking lot drainage ditch flow instability, in order to ensure that the submersible sewage pump does not damage the motor due to frequent start and stop, according to the "building water supply and drainage design specifications" requirements, this part of the volume of water storage should not be less than the largest pump in the well under automatic control state 5min The amount of water. At the same time, this height will play a decisive role in the design depth of catchment wells. In the design, to meet the sensitive requirements of the control equipment, the height is usually compressed as much as possible, and the total depth of the water collecting well is reduced by 500 to 600 mm to facilitate the structural design and appropriately reduce the cost.

4.3 Super high section

Generally take 30 ~ 400mm, this part must meet the requirements of the control system device and the thickness of the cover plate.