Structural steel and foundation embedded connection structure

The pre-embedded connection structure is formed by integral pouring of prefabricated components and the base plate. The prefabricated component is a reinforced concrete connection block with a connecting steel plate on the upper surface, and the reinforced concrete connection block is surrounded by reserved steel bars connected with the internal reinforcement of the foundation. A plurality of structural steel connecting screws penetrating through the prefabricated components are arranged within the scope of the connecting steel plates, and the lower parts of the connecting screws extend into the foundation.

The pre-embedded connection structure between the steel structure and the foundation according to the requirements, is characterized in that the reserved steel bar can be formed by extending the reserved extension length of the main steel bar in the prefabricated component to pass through the two sides of the prefabricated component, or a separate reinforcement can be horizontally penetrated through the whole prefabricated block made of components.

The pre-embedded connection structure between the structural steel and the foundation is characterized in that the connecting screw adopts a fully threaded stud, the length required for connecting the steel structure is reserved on the upper part of the connecting steel plate, and the horizontal adjustment nut is set on the lower surface of the prefabricated component to extend into the foundation A layer of positioning nuts is provided at the end of the connecting screw.

The pre-embedded connection structure between the structural steel and the foundation is characterized in that the connection between the reinforced concrete connection blocks of the prefabricated components and the connecting steel plates is reinforced by prestressed bolts. Vibration holes and exhaust holes that penetrate up and down are reserved on the prefabricated components. The lower surface and side of the reinforced concrete connecting block are in the shape of alveolar, and the bottom of the connecting steel plate is welded with connecting short ribs.

The prefabricated component required is characterized in that the prestressed bolts are arranged at the four corners and the middle of the connecting steel plates, the bolts are embedded in the reinforced concrete connecting blocks, and the nuts on the connecting steel plates can be tightened to apply prestress to the reinforced concrete connecting blocks and the connecting steel plates.

The prefabricated component according to the requirements is characterized in that the short connecting bars are evenly arranged on the lower surface of the connecting steel plate, inserted into the reinforced concrete connecting block, and connected with the main reinforcement of the reinforced concrete connecting block.

The construction method of the structural steel and the pre-embedded connection structure of the foundation mainly includes the following steps:

1. Treatment of connecting steel plate: Cut the steel plate according to the design requirements, and respectively set vibrating holes, vent holes and various bolt holes on it, and weld and connect short ribs on one side.

2. Preparation of prefabricated components: Place the connecting steel plates on the production table, place the short ribs facing upwards, set up the formwork, bind the steel bars of the reinforced concrete connecting blocks, and pre-embed plastic pipes as vent holes and vibration holes.

3. Pouring prefabricated components: After positioning the prestressed bolts and connecting screws, pour concrete into the mold (the connecting steel plate is at the bottom), vibrate properly and then maintain.

4. Formwork removal and edge trimming: After the concrete reaches the design strength requirements, the formwork is removed, the vent holes and the concrete at the vibrating hole holes are repaired to prevent the holes from being blocked, and the alveolar surface of the reinforced concrete connection block is repaired.

5. Install prefabricated components: By adjusting the height of the horizontal adjustment nut and positioning nut on the lower extension of the connecting screw, ensure that the prefabricated components are placed horizontally and accurately positioned on the steel bars in the foundation floor.

6. Pouring the foundation: pouring the foundation floor concrete, through the vibrating holes reserved on the prefabricated components, the concrete under the prefabricated components is vibrated compactly, and the air bubbles in the lower part are discharged through the vent holes to ensure that the old and new concrete are tightly bonded.

7. Finishing work: After the concrete maintenance of the foundation floor is completed, use concrete recharge vents and vibration holes with higher strength, wipe off the attachments on the surface of the connecting steel plate, and adjust the prestressed bolts and nuts.

According to the construction method described in the requirements, it is characterized in that the prefabricated components are poured upside down, that is, the connecting steel plate is placed on the bottom, and the reinforced concrete connecting section is poured on the upper part.

The required construction method is characterized in that strip-shaped wooden blocks are nailed on the top of the inner interval of the prefabricated component formwork, and holes are reserved according to the extension position of the reserved steel bars.