How is the steel structure foundation checked and accepted?
When the foundation works in the handover, every time the acceptance of not less than one can form the installation unit space stiffness plinth foundation, and shall comply with the following provisions: the foundation of concrete strength to meet the design requirements; based around backfilling completed; and high standard basic symbol axis and datum point accurately, top surface of the foundation shall be complete; flat, two times of the surface water cut hair, bolt should be intact.
The column position in the column surface measuring axis of projectile.Level of plinth elevation. Concrete plinth elevation 50 ~ 60 mm for general casting (compared with steel column base design, installation in elevation) with steel plate or early adoption by plasma plate leveling.When using the steel plate support plate, steel plate area should be determined according to the fastening force and compressive strength, concrete of foundation base plate two times before grouting at the bottom of the column load and anchor bolt. The contact between the shim and the base and the bottom of the column should be smooth and tight.When the cushion plate is used, the shrinkage free mortar shall be adopted. The strength of the mortar block should be higher than that of the base concrete before the lifting of the column, and the mortar pad should have enough area to meet the requirements of the load.
Before the steel structure is installed, the location axis, the basic axis and elevation, the bolt specifications and the location of the building shall be reviewed, and the basic inspection and handover acceptance shall be carried out. If the anchor bolt needs to check the axis and elevation of each bolt, the corresponding remedial measures must be taken when the specification is exceeded. Such as increasing the size of the column bottom, re drilling on the bottom of the column according to the actual location of the bolt.
