Steel Structure Foundation 日本

Steel structure foundation It's made of reinforced concrete, and it takes about a month to dig and level the ground.

Then the anchor bolts were lowered into the foundation, concrete was added, and it was expected to take about 15 days.

Finally, the steel column is connected with anchor bolt, and the foundation part is completed.

Anchor bolts are generally made of Q235 steel, that is, light round. Rebar (Q345) is strong, and the thread of the nut is not easy to make. For the light roundl anchor bolt, the burial depth is generally 25 times its diameter, and then make a 90-degree bending hook about 120mm long. If the diameter of the bolt is large (such as 45mm) and the depth is too deep, you can weld the square plate at the end of the bolt, that is, make a big head on it (but there are certain requirements). The buried depth and bent hook are to ensure the friction between the bolt and the foundation, so that the bolt will not be pulled out and damaged.

The Using

It is poured with the foundation to hold the equipment without strong vibration and shock

How construction

One time embedding method: When pouring concrete, the anchor bolts are buried. When the tower is controlled by overturning, the anchor bolt should be buried once.

The steel column is then connected to the anchor bolt.

Connected two type.

1. Fixed column base: Anchors are bolted on the outside of the flange, usually not less than 4. The force between the members can be divided into vertical force, horizontal force and bending moment. Rigid joint makes the steel plate not easy to cause damage, and the structural cracks gather together through rigid joint, which can play the role of warning of damage and increase safety.

2. Hinge bolt:anchors on the inside of the flange, generally two or four. Flexible connection, can only transfer shear force, can not transfer the role of bending moment. With the rotation of the hinge, the force is mainly acted on the hinge center, so that the structure at both ends of the four sides of the pressure, can play a good pressure division.

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