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Anchor bolt is generally made of Q235 steel, Namely the, light circle. The strength of the rebar (Q345) is large, Do not screw nut round easily. The light circle for anchor bolt, The depth is generally 25 times of its diameter, Then make a 120mm about a long degree bend hook. If the 90 bolt diameter is large (such as 45mm) buried deep too deep, You can weld the square plate in the end of the bolt., Namely to, do a big head can (but also have certain requirements Both deep and). Curved hooks are designed to guarantee the friction between bolts and foundation., Do not cause the bolt to pull out the damage,
Classification:
Anchor bolt can be divided into fixed anchor bolts, bolts anchor, activities expansion anchor bolt and anchor bolt bonding. anchor The
Uses:
1, fixed bolt is also called short anchor bolt It's, with the foundation. Equipment, used for fixing no strong vibration and impact. the,
2, the anchor bolt is also called the long bolt is a kind of removable anchor bolt, heavy mechanical equipment used for the fixation of heavy mechanical equipment with strong vibration and impact..
3, anchor anchor bolt is often used in simple equipment or auxiliary fixed equipment Bilge static. anchor anchor installation should meet the following requirements: bolt expanding
(1) anchor bolt diameter bolt center to the edge of the base distance of not less than expansion 7 times;
(2) on the strength of the anchor bolt installation of expansion anchor shall not be less than 10MPa based;
(3) is no crack in the borehole Attention, to prevent the drill and the foundation of the steel there, collision. pipe,
(4) hole diameter and depth should be matched with the expansion anchor bolt. the
4. As a kind of adhesive anchor bolt anchor bolts used in recent years, the methods and requirements of the same expansion foot bolt anchorage. But when the bonding, the hole debris as well net, and can not be affected with moisture.,
Method Installation
1 time buried method: when pouring concrete The, embedded anchor bolts. When the tower is overturned and controlled The, anchor bolt should adopt an embedded method. One,
2, reserved hole and equipment in place, clean the holes., the anchor bolts in Kong Zhong, the equipment location is then poured with the no based fine stone concrete which is higher than the base level, Tamping compaction.,
An embedded anchor bolt center to the edge of the base distance shall not be less than 4D (D is the diameter of the anchor bolts), and should not be less than 150mm (D is less than or equal to 20 should not be less than 100mm), the half of the width of the anchor plate is not less than 50mm, when the above requirements can not meet, appropriate measures should be taken. Strengthen.,
Bolt diameter should not be less than 20mm structure. anchor
When subjected to earthquake, double nut fixation should be used, or use other measures against loosening.. But the anchorage length of the anchor bolt should be non seismic anchorage length increased..