There is no need to bond the anchorage and the carbon plate with structural glue before installation and construction, and the construction process is simpler.
1. Substrate quality
For most engineering structures, the base material is generally concrete. Because concrete is a heterogeneous material, there may be some deviations in the pouring and vibration of the site, so the strength of the concrete may be low. Especially for high-rise buildings, in order to ensure the fluidity of the concrete during the concrete pouring process, the slump of commercial concrete will be very large.
Some construction units add water to the concrete during pouring to increase its fluidity. The result of this situation is the stratification and segregation of concrete. In some serious cases, the strength of the concrete substrate will be far lower than the design requirements. If the anchor bolts are fixed at these positions, it may cause damage to the substrate.
In addition, cracks in reinforced concrete structures are inevitable under working conditions. Assuming that the width of the crack does not exceed a certain value, it is not necessary to consider the impact of the crack on the structure. Taking this into consideration, the designer will assume that there are cracks in the tensile zone of the reinforced concrete member when designing. When there are cracks, the principle of anchor bolt load-bearing changes significantly, because in fact the edge of the crack no longer bears the original circular tension, and the crack destroys the original bearing system, thereby reducing the bearing capacity of the entire mis-fixed system.
2. The quality of anchor glue
The physical and chemical properties of anchoring glue directly affect the anchoring effect. The widely used anchoring glue in my country is epoxy-based anchoring glue. Other types of anchoring glue are mainly inorganic anchoring glue and imported glue. There are test indicators such as durability and temperature resistance of anchoring adhesives, and east melting properties. should pass. Therefore, under the premise that the anti-aging properties of various brands of chemical anchors in my country have not been verified by actual working conditions for a long time, there are still certain hidden dangers in the large-scale use of chemical anchors.
3. Construction quality
In the actual construction process, due to various factors such as the quality of the construction personnel, the conditions of the construction site, and the limitation of the construction period, it is often impossible to implement in accordance with the relevant regulations.