How to find the slope of gutter drainage?
In the construction process of polyethylene film greenhouse, effective drainage system is a crucial part, especially the design of gutter drainage system. A reasonable drainage slope can not only prevent water accumulation, but also ensure the rapid discharge of rainwater and avoid damage to the structure. So how to find a good slope of polyethylene film greenhouse gutter drainage?
First of all, the design slope of the gutter is generally high in the middle and low on both sides, so as to facilitate the flow of rain to both sides and discharge. As a rule of thumb, the slope of a gutter should be set between 2.5 and 4 ‰. However, the determination of the specific slope also takes into account the maximum rainfall in the area to ensure that the drainage system can work effectively in extreme weather conditions.
In order to find the right slope for gutter drainage, there are three common methods:
1. Cutting the main column after the foundation is leveled: This method first requires the level of the foundation, and then cuts the main column according to the required slope. The advantage of this method is that it is highly accurate and can meet specific slope requirements. However, the operation process is more complicated and requires more labor and time.
2. Foundation slope finding method: When pouring the foundation, find the required slope directly on the foundation. This method can determine the drainage slope at the early stage of construction and reduce the workload of subsequent adjustment, but the construction accuracy is higher.
3. Embedded iron slope finding method: After leveling the foundation, the screws of embedded iron four corner bolts are 12-14 cm, and the height of the bolts is adjusted to reach the height required by the column. The advantages of this method are high efficiency, flexibility and labor saving, and it is a more common practice at present. By flexibly adjusting the height of the bolt, the required slope can be quickly and accurately found, which greatly improves the construction efficiency.
In practice, the embedded iron slope finding method is widely used because of its high efficiency and flexibility. By flexibly adjusting the height of the bolt, the required slope can be quickly and accurately found, which greatly improves the construction efficiency. In addition, the embedded iron can also be adjusted according to the actual situation to adapt to climate change and changes in the polyethylene film greenhouse structure.
