A connection structure at the corner of the top slab of the straight section and the climbing section of the entrance / exit

Abstract

This utility model discloses a connection structure at the corner of the top slabs of a straight section and an inclined section at an entrance / exit. It includes a straight section top slab and an inclined section top slab, with a top welding structure, a concave-convex connection structure, and a bottom welding structure provided between them. A precision-rolled threaded steel connecting assembly is installed in the concave-convex connection structure. This utility model uses a connector to fix the precision-rolled threaded steel between the straight section top slab and the inclined section top slab, and uses a reaction anchor to fix the precision-rolled threaded steel extending beyond the top slab, providing a reaction force connection to fix the straight section top slab and the inclined section top slab. Compared with using cast-in-place corner top slabs, this utility model saves construction time and shortens the project period. Compared with prefabricated corner irregular formwork, it saves the manufacturing cost and difficulty of irregular formwork.

Description

Technical Field

[0001] This utility model belongs to the technical field of prefabricated underground structure engineering, specifically relating to a connection structure at the corner of the top plate of the straight section and the climbing section of the entrance / exit. Background Technology

[0002] The roof slab, as a major component of the entrance and exit of a prefabricated subway station, is not only the main load-bearing component of the entrance and exit but also the primary seismic energy dissipation component. Due to the segmented prefabrication of the straight and sloping sections of the roof slab at the entrance and exit of the prefabricated subway station, the reliability of the connection at the joint between the straight and sloping sections of the roof slab directly has a decisive impact on the overall structure, load-bearing capacity, and deformation capacity of the prefabricated subway station.

[0003] In designing the connection methods for standard and ascending sections, common methods include: 1) Cast-in-place connection between straight and ascending sections. This method requires extensive scaffolding to support the formwork, impacting construction time. 2) Precast integral components between straight and ascending sections, making the corner connection a single unit. This method requires custom-made irregular-shaped formwork, which is difficult to manufacture and increases prefabrication costs. Furthermore, the finished product may not meet usage requirements. Both connection methods have their own problems. Summary of the Invention

[0004] This utility model is proposed to solve the problems existing in the prior art. Its purpose is to provide a connection structure at the corner of the top plate of the straight section and the climbing section of the entrance / exit.

[0005] The technical solution of this utility model is: a connection structure at the corner of the top plate of the straight section and the climbing section of the entrance and exit, including the top plate of the straight section and the top plate of the climbing section, and a top welding structure, a concave-convex connection structure and a bottom welding structure are provided between the top plate of the straight section and the top plate of the climbing section, and a fine-rolled threaded steel connecting component is installed in the concave-convex connection structure.

[0006] Furthermore, the concave-convex connection structure includes a longitudinal connecting tenon formed at the side end of the flat section top plate and a longitudinal connecting tenon formed at the side end of the climbing section top plate. The longitudinal connecting tenon and the longitudinal connecting tenon are in corresponding positions and have corresponding shapes, forming a concave-convex socket structure.

[0007] Furthermore, a pre-reserved hand hole is formed in the groove bottom of the longitudinal connecting tenon, and a straight section of fine-rolled threaded steel and a ramp section of fine-rolled threaded steel are connected in the pre-reserved hand hole. The straight section of fine-rolled threaded steel is set in the top plate of the straight section, and the ramp section of fine-rolled threaded steel passes through the top plate of the ramp section.

[0008] Furthermore, a pre-drilled hole for a precision-rolled threaded steel bar is formed in the top plate of the ramp section, through which the precision-rolled threaded steel bar of the ramp section passes.

[0009] Furthermore, the protruding section of the fine-rolled threaded steel bar in the climbing section is equipped with a reaction anchor for fixing.

[0010] Furthermore, a water-stop strip groove is provided between the top plate of the straight section and the top plate of the sloping section.

[0011] Furthermore, the water-stop strip groove has at least two grooves, located near the upper and lower ends of the top plate of the straight section, respectively.

[0012] Furthermore, the top welding structure includes angle steel at the top edge joint of the top plate of the straight section and the top corner of the top plate of the climbing section, and the corresponding angle steel at the top edge joint is welded and fixed.

[0013] Furthermore, the bottom welding structure includes angle steel at the bottom edge joint of the top plate of the straight section and the bottom corner of the top plate of the climbing section, and the corresponding bottom edge joint angle steel is welded and fixed.

[0014] The beneficial effects of this utility model are as follows:

[0015] This utility model uses a connector to fix the fine-rolled threaded steel between the top plate of the straight section and the top plate of the climbing section, and uses a reaction anchor to fix the fine-rolled threaded steel extending outside the top plate, providing a reaction force connection to fix the top plate of the straight section and the top plate of the climbing section, thus fixing the top plate of the straight section and the top plate of the climbing section.

[0016] Compared with using cast-in-place corner slabs, this utility model saves the construction time of cast-in-place slabs and shortens the project period. Compared with precast corner irregular formwork, it saves the production cost and difficulty of irregular formwork. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of the connection between the corner structure of the precast top slab of the straight section and the climbing section of this utility model;

[0018] Figure 2 This is a top view of the connection between the corner structure of the precast top slab of the straight section and the climbing section of this utility model;

[0019] Among them, 1 is angle steel; 2 is anchor head; 3 is fine-rolled threaded steel for climbing section; 4 is steel plate for pre-embedded welded anchor seat; 5 is angle steel at bottom edge joint; 6 is angle steel at top edge joint; 7 is vent hole; 8 is grouting hole; 9 is groove of waterstop strip; 10 is longitudinal connecting tenon; 11 is longitudinal connecting tenon; 12 is reserved hole for fine-rolled threaded steel; 13 is reserved hand hole; 14 is connector; 15 is connecting anchor head; 16 is pad plate; 17 is fine-rolled threaded steel for straight section; 18 is top plate for straight section; 19 is top plate for climbing section. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0021] like Figures 1 to 2 As shown, a connection structure at the corner of the top plate of the straight section and the ramp section of the entrance / exit includes a top plate 18 of the straight section and a top plate 19 of the ramp section. A top welding structure, a concave-convex connection structure, and a bottom welding structure are provided between the top plate 18 of the straight section and the top plate 19 of the ramp section. A precision-rolled threaded steel connecting component is installed in the concave-convex connection structure.

[0022] The concave-convex connection structure includes a longitudinal connecting tenon 10 formed at the side end of the flat section top plate 18 and a longitudinal connecting tenon 11 formed at the side end of the climbing section top plate 19. The longitudinal connecting tenon 10 and the longitudinal connecting tenon 11 are in corresponding positions and have corresponding shapes, forming a concave-convex socket structure.

[0023] A pre-reserved hand hole 13 is formed in the groove bottom of the longitudinal connecting tenon 10. A straight section fine-rolled threaded steel bar 17 and an inclined section fine-rolled threaded steel bar 3 are connected in the pre-reserved hand hole 13. The straight section fine-rolled threaded steel bar 17 is set in the top plate 18 of the straight section, and the inclined section fine-rolled threaded steel bar 3 passes through the top plate 19 of the inclined section.

[0024] A pre-drilled threaded steel hole 12 is formed in the top plate 19 of the climbing section, and the pre-drilled threaded steel 3 of the climbing section passes through the pre-drilled threaded steel hole 12.

[0025] The protruding section of the fine-rolled threaded steel bar 3 in the climbing section is equipped with a reaction anchor for fixing.

[0026] A water-stop strip groove 9 is provided between the top plate 18 of the straight section and the top plate 19 of the climbing section.

[0027] The water-stop strip groove 9 consists of at least two grooves, located near the upper and lower ends of the top plate 18 of the straight section, respectively.

[0028] The top welded structure includes angle steel 6 at the top edge joint of the top corner of the straight section top plate 18 and the climbing section top plate 19, and the corresponding top edge joint angle steel 6 is welded and fixed.

[0029] The bottom welding structure includes angle steel 5 at the bottom edge joint of the top plate 18 of the straight section and the bottom corner of the top plate 19 of the climbing section, and the corresponding bottom edge joint angle steel 5 is welded and fixed.

[0030] Specifically, such as Figure 1 As shown, after the inclined section fine-rolled threaded steel bar 3 passes through the reserved hole 12 of the fine-rolled threaded steel bar, one end of the inclined section fine-rolled threaded steel bar 3 is connected to the straight section fine-rolled threaded steel bar 17 in the reserved hand hole 13.

[0031] More specifically, the protruding section of the straight section of the fine-rolled threaded steel bar 17 forms a connecting anchor head 15, which is fixed to the reserved hand hole 13 via a pad 16. The connecting anchor head 15 is connected to the inclined section of the fine-rolled threaded steel bar 3 via a connector 14. The connector 14 connects the straight section of the fine-rolled threaded steel bar 17 and the inclined section of the fine-rolled threaded steel bar 3.

[0032] Specifically, the reaction anchor includes an angle steel 1, through which the finely rolled threaded steel 3 of the climbing section can pass and be fixed by the anchor head 2. The finely rolled threaded steel 3 of the climbing section extends through the steel plate 4 of the pre-embedded welded anchor to the outside of the top plate 19 of the climbing section, where it is fixed and protected by the angle steel 1, and the external anchor head 2 is used to tighten and fix the threaded steel 3.

[0033] Specifically, the angle steel 1, the anchor head 2, and the steel plate 4 for the pre-embedded welded anchor seat form a reaction anchor seat, which provides reaction force for the fine-rolled threaded steel 3 of the climbing section and fixes the top plate 18 of the straight section and the top plate 19 of the climbing section.

[0034] Specifically, an exhaust hole 7 is formed in the top plate 19 of the climbing section. The exhaust hole 7 is connected to the reserved hole 12 of the fine rolled threaded steel, and the upper end of the exhaust hole 7 is connected to the top of the top plate 19 of the climbing section.

[0035] Specifically, a grouting hole 8 is formed in the straight section top plate 18. The lower end of the grouting hole 8 is connected to the reserved hand hole 13, and the upper end of the grouting hole 8 is connected to the top of the straight section top plate 18. The grouting hole 8 is used for grouting the reserved hand hole 13.

[0036] A connection structure at the corner of the top slab of the straight section and the climbing section of the entrance / exit includes a top slab 18 of the straight section, a top slab 19 of the climbing section, and a reaction anchor. Using this connection structure can accelerate construction progress, improve efficiency, and ensure safe and reliable node connections.

[0037] The following is a method for assembling the connection structure at the corner of the top slab of the straight section and the ramp section of the entrance / exit:

[0038] First, the manufacturer welds the angle steel 1 of the reaction anchor to the steel plate 4 for the pre-embedded welded anchor.

[0039] Then, after the flat section top plate 18 is installed, assuming the climbing section top plate 19 is in the designated position, the climbing section fine thread steel 3 is inserted into the fine thread steel reserved hole 12 and securely connected to the connector 14 in the reserved hand hole 13.

[0040] Then, prestress is applied to the precision-rolled threaded steel using specialized machinery, and after a period of time, the precision-rolled threaded steel 3 of the climbing section is fixed using matching anchor heads;

[0041] Finally, the construction of the connection structure at the corner of the prefabricated top slab of the straight section and the ramp section of the prefabricated entrance and exit was completed, and the installation of the top slab of the ramp section continued.

[0042] This utility model uses a connector to fix the fine-rolled threaded steel between the top plate of the straight section and the top plate of the climbing section, and uses a reaction anchor to fix the fine-rolled threaded steel extending outside the top plate, providing a reaction force connection to fix the top plate of the straight section and the top plate of the climbing section, thus fixing the top plate of the straight section and the top plate of the climbing section.

[0043] Compared with using cast-in-place corner slabs, this utility model saves the construction time of cast-in-place slabs and shortens the project period. Compared with precast corner irregular formwork, it saves the production cost and difficulty of irregular formwork.

Claims

1. A connection structure at the corner of the top plate of the straight section and the ramp section of an entrance / exit, comprising a top plate of the straight section (18) and a top plate of the ramp section (19), characterized in that: A top welding structure, a concave-convex connection structure, and a bottom welding structure are provided between the top plate of the straight section (18) and the top plate of the climbing section (19). A fine-rolled threaded steel connecting component is installed in the concave-convex connection structure.

2. The connection structure at the corner of the top plate of the straight section and the climbing section of the entrance / exit as described in claim 1, characterized in that: The concave-convex connection structure includes a longitudinal connecting tenon (10) formed at the side end of the flat section top plate (18) and a longitudinal connecting tenon (11) formed at the side end of the climbing section top plate (19). The longitudinal connecting tenon (10) and the longitudinal connecting tenon (11) are in corresponding positions and have corresponding shapes, forming a concave-convex socket structure.

3. The connection structure at the corner of the top plate of the straight section and the climbing section of the entrance / exit as described in claim 2, characterized in that: A reserved hand hole (13) is formed in the groove bottom of the longitudinal connecting tenon (10). A straight section fine-rolled threaded steel bar (17) and an inclined section fine-rolled threaded steel bar (3) are connected in the reserved hand hole (13). The straight section fine-rolled threaded steel bar (17) is set in the top plate (18) of the straight section, and the inclined section fine-rolled threaded steel bar (3) passes through the top plate (19) of the inclined section.

4. The connection structure at the corner of the top plate of the straight section and the climbing section of the entrance / exit as described in claim 3, characterized in that: A pre-drilled threaded steel hole (12) is formed in the top plate (19) of the climbing section, and the pre-drilled threaded steel (3) of the climbing section passes through the pre-drilled threaded steel hole (12).

5. The connection structure at the corner of the top plate of the straight section and the climbing section of the entrance / exit as described in claim 4, characterized in that: The protruding section of the fine-rolled threaded steel bar (3) in the climbing section is equipped with a reaction anchor for fixing.

6. The connection structure at the corner of the top plate of the straight section and the climbing section of the entrance / exit as described in claim 1, characterized in that: A water-stop strip groove (9) is provided between the top plate of the straight section (18) and the top plate of the climbing section (19).

7. The connection structure at the corner of the top plate of the straight section and the climbing section of the entrance / exit as described in claim 6, characterized in that: The water-stop strip groove (9) consists of at least two grooves, located near the upper and lower ends of the top plate (18) of the straight section.

8. The connection structure at the corner of the top plate of the straight section and the climbing section of the entrance / exit according to claim 1, characterized in that: The top welding structure includes angle steel (6) at the top corner of the top edge joint of the top plate (18) of the straight section and the top plate (19) of the climbing section, and the corresponding angle steel (6) at the top edge joint is welded and fixed.

9. The connection structure at the corner of the top plate of the straight section and the climbing section of the entrance / exit according to claim 1, characterized in that: The bottom welding structure includes angle steel (5) set at the bottom corner of the top plate (18) of the straight section and the top plate (19) of the climbing section, and the corresponding bottom corner angle steel (5) is welded and fixed.

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