How to fix keel and concrete

In building construction, the fixation of keels and concrete is a key step to ensure the stability and safety of the structure. This link is not only related to the overall quality of the building, but also directly affects the later use and maintenance. Next, we will delve into how to effectively fix the keel and concrete from multiple aspects.

1. Keel material selection and pretreatment

The keel serves as a supporting structure, and its material selection is crucial. Usually, we choose corrosion-resistant, high-strength steel or wooden materials. Before fixing, the keel needs to be rust-removed and anti-corrosion treated, and the wooden keel needs to be dry and insect-proof. These pre-treatments can significantly improve the durability of the joists and their adhesion to the concrete.

2. Concrete foundation preparation

The concrete foundation should be smooth, solid, and free of cracks, hollows, etc. When pouring concrete, anchor bolts or steel bars can be pre-embedded to provide support points for subsequent keel fixing. After the concrete strength reaches the design requirements, the keel can be installed.

3. Fixed mode selection

Choose the appropriate fixing method according to the material of the keel and the condition of the concrete foundation. For steel keels, welding and bolting can be used; for wooden keels, nails, screws or special fixings are often used. Consider environmental factors. For example, in humid environments, anti-corrosion fixings should be used.

4. Fixed point layout

The layout of fixed points must be scientific and reasonable, not only to ensure the stability of the keel, but also to avoid excessive concentration that may cause concrete cracking. Generally, the principle of uniform distribution should be followed, and the spacing between fixed points should be determined according to the length of the keel and the stress situation.

5. Tips for installing fixtures

When installing fixings, make sure they are vertical and firm and avoid being skewed or loose. For bolted connections, nuts need to be tightened and washers added to prevent loosening; for nails and screws, appropriate lengths and specifications need to be selected to ensure penetration into the keel and deep into the concrete.

6. Secondary pouring of concrete

In some cases, in order to enhance the fixing effect between the keel and the concrete, secondary pouring can be performed. That is, after the keel is fixed, another layer of concrete is poured to completely wrap the keel. This method can significantly improve the integrity and stability of the structure.

7. Maintenance and inspection

After the fixation is completed, the concrete needs to be cured to ensure that its strength continues to increase. Regularly check the fixation of keels and concrete, and promptly detect and deal with problems such as looseness and corrosion.

8. Handling special situations

For keels of special shapes or sizes, as well as concrete foundations under complex geological conditions, special fixing measures are required. For example, use customized fixings, reinforced brackets, etc. to ensure that the fixing effect meets the design requirements.

9. Safety and environmental considerations

During the fixing process, safety operating procedures should be strictly followed to ensure the safety of construction personnel. Use environmentally friendly materials and technologies to reduce environmental impact. For example, use paint with low volatile organic compounds and adopt dust-free operations.

10. Quality acceptance and evaluation

After the fixation is completed, quality acceptance and evaluation should be carried out. Through visual inspection, tensile testing and other means, ensure that the fixing effect of the keel and concrete meets the design requirements. Unqualified parts need to be rectified in time and re-accepted.

The fixation of the keel to the concrete is a complex and meticulous process. Through scientific and reasonable efforts in material selection, pretreatment, fixation method selection, point layout, fixation installation, secondary pouring, maintenance inspection, special situation handling, and safety and environmental protection considerations, we can ensure the connection between the keel and the concrete. The fixation between them is firm and reliable, providing a strong guarantee for the safety and stability of the building.