The tensile capacity of the anchor bolt is the tensile […]
The tensile capacity of the anchor bolt is the tensile capacity of the round steel itself, and the size equal to the cross-sectional area multiplied by the design value of tensile strength (140MPa) is the allowable tensile capacity during design.
When installing anchor screws and mechanical components on concrete foundations, the J-shaped and L-shaped ends of this type of screw are buried in the concrete for use. It can fasten the machine to the ground. Generally used in railways, highways, power companies, cement plants, mines, bridges, automobiles, motorcycles, boiler steel structures, tower cranes, large-span steel structures and large buildings, etc. Anchor bolts can be divided into fixed anchor bolts, movable anchor bolts, expansion anchor anchor bolts and adhesive anchor bolts.
1. Fixed anchor bolts are also called short anchor bolts, which are poured together with the foundation to fix equipment without strong vibration and impact.
2. Movable anchor bolts, also called long anchor bolts, are detachable anchor bolts used to fix heavy machinery and equipment that have strong vibration and impact during work.
3. Expansion anchor anchor bolts are often used to fix simple static equipment or auxiliary equipment. The installation of anchor bolts should meet the following requirements:
(1) The distance from the bolt center to the edge of the foundation is not less than 7 times the diameter of the anchor bolt of the expansion anchor;
(2) The foundation strength for installing expansion anchor anchor bolts shall not be less than 10MPa;
(3) There should be no cracks at the drilled hole, and attention should be paid to prevent the drill bit from colliding with the steel bar and buried pipe in the foundation.
4. The bonding anchor bolt is a kind of anchor bolt commonly used in recent years, and its method and requirements are the same as the expansion anchor anchor bolt. But pay attention to blowing the sundries in the hole when bonding, and not get damp.
The quality of the anchor bolts directly affects the quality of equipment installation. Some equipment has strict requirements on the accuracy of elevation and location, especially for linkage equipment with a high degree of automation. Therefore, after the anchor bolts are buried and before the equipment is installed, they must be inspected and corrected. When a deviation occurs, it should be dealt with according to the actual situation of the equipment, and different processing methods should be adopted.