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The installation plan for anchor bolts is to deal with the loosening of anchor bolts in the foundation.
When tightening the anchor bolts, the bolts may be pulled out. At this time, the bolts should be adjusted to their original position first,
and the foundation around the bolts should be shoved out in sufficient position. Then, two U-shaped steel bars in both vertical and horizontal directions should be welded on the bolts.
Finally, the pit should be cleaned with water and grouted. After the concrete solidifies to the design strength, the deviation of the live anchor bolts can be tightened.
The method for handling the deviation of the live anchor bolts is roughly the same as that of the dead anchor bolts, but the anchor bolts can be pulled out.
If the bolt is too long, a section can be cut off on the machine tool and threaded again. If the bolt is too short, it can be extended by hot forging;
If the position does not match, correct it using the bending method.
Different Types Of High Quality Anchor Bolts
The end anchoring part of the claw type anchor bolt adopts a claw type,
3 evenly distributed hooked steel bars
And welded onto the bolts.
The heat generated during the welding of hooked steel bars may have an adverse effect on the strength of bolts,
making it suitable for towers with higher load-bearing capacity
When designing, it should be noted that the claws should not exceed the concrete protective layer,
At the same time, be careful not to collide with the surrounding hoop reinforcement,
If the distance between the pawl and the surrounding steel bars is small or collides
The direction of the pawl can be adjusted during installation
To avoid collision of claw type anchor bolts in the anchoring part during burial
Based on the material, bearing capacity, and type characteristics of claw type anchor bolts,
it is recommended to use claw type anchor bolts for Grade 5.6 anchor bolts
Different Types Of High Quality Anchor Bolts
Double headed anchor bolts have threads on both ends of the bolt
Easy to assemble with high load-bearing capacity
Widely applied in engineering
The bolt anchoring part adopts an anchor hole plate type
Anchor hole plate fixed between two nuts
It can improve the pull-out resistance of anchor bolts.
The materials of anchor bolts usually include Q235, Q345, 35 grade high-quality carbon steel, 45 grade high-quality carbon steel,
40Cr alloy structural steel, and 42CM0 alloy structural steel. Among them, Q235 steel is a commonly used choice,
which can be used directly without the need for heat treatment process. After heat treatment and tempering,
the surface hardness of Q235 steel can reach 1300HV, which exceeds the hardness of high-speed steel in metallurgical industry.
In addition, the material of the anchor bolts can also be selected according to the specific usage environment and requirements.
1. Fixed anchor bolts, also known as short anchor bolts, are poured together with the foundation to secure equipment without strong vibration and impact.
2. The movable anchor bolt, also known as the long anchor bolt, is a detachable anchor bolt used to fix heavy machinery equipment that has strong vibration and impact during operation.
3. Expansion anchor anchor bolts are often used to fix simple or auxiliary equipment that is stationary.
The installation of expansion anchor anchor bolts should meet the following requirements:
the distance from the center of the bolt to the edge of the foundation should not be less than 7 times the diameter of the expansion anchor anchor bolts;
The foundation strength for installing expansion anchor anchor anchor bolts shall not be less than 10MPa;
There should be no cracks at the drilling site, and attention should be paid to preventing collisions between the drill bit and the steel bars and buried pipes in the foundation;
The drilling diameter and depth should match the expansion anchor anchor anchor bolts,
4. Adhesive anchor bolts are a commonly used type of anchor bolt in recent years, and their methods and requirements are the same as those of expansion anchor anchor bolts. But when bonding, pay attention to blowing out the debris inside the hole and not getting damp.
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