A corrosion-resistant large-span prefabricated double T-plate and its connection structure

Abstract

The present invention discloses a corrosion-resistant large-span prefabricated double T-plate and a connection structure thereof, belonging to the field of building components. The double T-plate comprises two double T-plate bodies and two cross beams. The double T-plate body comprises a panel, and two ribs are integrally formed at the bottom of the panel. Side grooves are provided on the left and right sides of the upper surface of the panel, and two jacks are provided on the opposite sides of the two ribs. The various components in the present invention are relatively independent and interrelated, so that during the use of the building, if it is necessary to locally adjust or expand the structure, such as increasing the roof area, changing the installation position of equipment, etc., the operation can be carried out more conveniently, such as removing part of the panels or adjusting the connection position of the cross beams and longitudinal beams, and then re-splicing and fixing them without causing excessive damage to the entire building structure or affecting its overall stability; the connection operation between multiple double T-plate bodies and the cross beams is simple and quick, which can greatly improve the installation efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of building components, in particular to a corrosion-resistant large-span prefabricated double T-plate and a connection structure thereof. Background Art

[0002] With the development of modern construction, the number of long-span buildings such as exhibition halls, stadiums, and industrial plants continues to increase. These buildings require long-span roof structures to meet the functional requirements of large, column-free spaces. Prefabricated double-T panels, due to their excellent mechanical properties and large span capacity, have become a common component of long-span roof structures. However, achieving efficient and stable connections between prefabricated double-T panels and other structural components (such as beams) has become a key issue.

[0003] Traditional connection methods often suffer from complex installation, insufficient connection strength, and poor waterproofing, making them difficult to meet the structural integrity, stability, and durability requirements of long-span buildings. Some existing connection technologies cannot effectively constrain the displacement of prefabricated double-T panels in all directions, causing the structure to sway, deform, or even fail under load. For example, some simple lap joints are prone to slippage under horizontal forces, failing to ensure coordination between the double-T panels and the horizontal and longitudinal beams, reducing the overall structure's load-bearing capacity and seismic performance.

[0004] Waterproofing the joints of prefabricated double-T panels has always been a challenge. Traditional sealing materials and connection methods are ill-suited to the deformation and long-term weathering of long-span roofs. Using conventional sealing strips and rubber rings for sealing can easily age and crack under the influence of temperature fluctuations, wind, and sunlight, leading to rainwater leakage and compromising the normal operation of the building and the safety of internal equipment.

[0005] Traditional prefabricated double-T plates do not fully consider corrosion resistance requirements in raw material selection and preparation processes. They mostly use ordinary Portland cement and unprotected steel bars, which are easily damaged in harsh corrosive environments.

[0006] Therefore, a corrosion-resistant large-span prefabricated double T-plate and its connection structure are needed to solve the above-mentioned problems. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the present invention provides a corrosion-resistant large-span prefabricated double T-plate and a connection structure thereof, which solves the problems raised in the above-mentioned background technology.

[0008] Technical solution: To solve the above technical problems, according to one aspect of the present invention, more specifically, a corrosion-resistant large-span prefabricated double T-plate is provided, comprising a double T-plate body, characterized in that the preparation process of the double T-plate body comprises the following steps:

[0009] S1. Raw material selection and processing

[0010] Cement: Use sulfate-resistant cement; add ultrafine mineral powder and silica fume mineral admixtures to the cement;

[0011] Aggregate: Coarse aggregate should be hard and well-graded crushed stone; fine aggregate should be medium sand, and the mud content should be strictly controlled within 3% to reduce the impact of impurities on the corrosion resistance of concrete;

[0012] Admixtures: Add an appropriate amount of high-efficiency water-reducing agent to improve the workability of concrete and reduce water consumption; add air-entraining agent to introduce tiny bubbles, improve the freeze-thaw resistance and anti-permeability of concrete, and add calcium nitrite as an anti-corrosion agent;

[0013] Steel bars: stainless steel bars are used and epoxy coating is applied on the surface of the steel bars. The coating thickness should generally be between 180-300μm.

[0014] S2. Steel skeleton production: Process the corrosion-resistant steel bars into steel skeletons; first straighten and remove rust from the steel bars to ensure their straightness and surface cleanliness;

[0015] S3. Concrete mixing: First, put the aggregate, cement and admixture into the mixer and dry mix for 1-2 minutes to fully mix the materials, then add water and continue mixing for 3-5 minutes until the concrete reaches a uniform working state;

[0016] S4. Concrete pouring: Pour the mixed concrete into the mold and pour it in layers. The thickness of each layer should be controlled between 30-50cm to ensure the density of the concrete. Vibrate and compact it after correction.

[0017] S5. Curing measures: Use steam curing method, control the curing temperature between 60-80℃, and keep the relative humidity above 90%; during the curing process, control the heating and cooling speeds to no more than 15℃ / h and 10℃ / h, to avoid cracks in the concrete due to temperature stress;

[0018] S6. Demoulding: When the concrete strength reaches about 70% of the design strength, demoulding is carried out. When demoulding, the side moulds are first removed, and then the double T-plate is lifted out of the bottom mould using a lifting device.

[0019] S7. Anti-corrosion coating construction: Apply anti-corrosion coating on the surface of double T-plate to further enhance its corrosion resistance; polyurethane paint is used for anti-corrosion coating.

[0020] According to another aspect of the present invention, more specifically, a connection structure of a corrosion-resistant large-span prefabricated double T-plate is provided, comprising two double T-plate bodies and two cross beams, wherein the double T-plate body comprises a panel, and two rib beams are integrally formed at the bottom of the panel, and side grooves are provided on the left and right sides of the upper surface of the panel, and two insertion holes are provided on the opposite sides of the two rib beams, and plug cylinders are symmetrically fixed on the lower surface of the panel, and two anchor rods are fixed on the lower surface of the side groove; the two cross beams are located below the two double T-plate bodies, and a sinking groove is provided on the upper surface of the beam, and four sliders are slidably connected inside the sinking groove, and the four sliders are slidably connected inside the sinking groove. The sliders are divided into two groups, and the opposite ends of the two sliders in each group are fixed with slides, and the slides are located on the upper surface of the cross beam, and the two slides are located between the two rib beams. Two insertion rods are fixed to the opposite ends of the two slides, and fixed plates are fixed to the opposite sides of the two slides. A connecting rod is rotatably connected inside the fixing plate, and the opposite ends of the two connecting rods are rotatably connected to screw blocks, and the screw blocks are threadedly connected to the screw blocks. The bottom end of the screw passes through the lower surface of the cross beam, and two insertion rods are fixed on the upper surface of the screw block. A clamping plate is fixed to the end of the slider away from the slide;

[0021] The two adjacent side grooves are jointly provided with a puzzle panel, and a bottom plate is provided below the puzzle panel between the two panels, and a through groove 1 is provided on the lower surface of the bottom plate, and two through grooves 2 are provided on the lower surface of the bottom plate, and an inner cavity is provided inside the bottom plate, and the inner cavity is respectively connected to the two through grooves 2 and the through groove 1, and a protrusion is fixed on the top of the bottom plate, and the top of the protrusion passes through the through groove 1 to the inner cavity, and the top ends of the two anchor rods pass through the through groove 2 to the inner cavity, and a vertical rod 1 is fixed on the upper surface of the inner cavity, and the top end of the vertical rod 1 passes through the bottom of the bottom plate, and the outer surface of the vertical rod 1 is located above the protrusion and is slidably connected to a connecting frame, and a connecting rod 2 is fixed to the left and right ends of the connecting frame, and the connecting rod 2 is rotatably connected to the tenon block at one end away from the connecting frame.

[0022] Furthermore, the first plug rod is plugged into the socket, and the second plug rod is plugged into the plug tube.

[0023] Furthermore, a longitudinal beam is provided on the upper surface of the two horizontal beams, and the longitudinal beam is located below the bottom plate. A vertical rod 2 is fixed on the upper surface of the longitudinal beam, and a screw barrel is threadedly connected above the outer surface of the vertical rod 2. The inside of the screw barrel is threadedly connected to the bottom end of the vertical rod 1. The outer surface of the vertical rod 1 is located below the bottom plate and is sleeved with a bracket, and the lower surface of the bracket is in contact with the upper surface of the screw barrel.

[0024] Furthermore, bottom blocks are fixed to the front and rear ends of the longitudinal beam, and the two bottom blocks are respectively located inside the two sinking grooves.

[0025] Furthermore, the outer surface of the tenon block is in contact with the inner surface of the inner cavity, the tenon block is in a triangular prism structure, and the tenon block is located between the two anchor rods.

[0026] Furthermore, a spring is sleeved on an outer surface of the vertical rod located above the connecting frame.

[0027] Furthermore, the clamping plate is an L-shaped structure, and the inner side of the clamping plate is in contact with the outer surface of the longitudinal beam.

[0028] The corrosion-resistant large-span prefabricated double T-plate and its connection structure of the present invention have the following beneficial effects:

[0029] (1) The various components of the present invention are relatively independent and interrelated, so that if it is necessary to make local adjustments or expansions to the structure during the use of the building, such as increasing the roof area, changing the installation position of equipment, etc., it can be operated more conveniently, such as removing some panels or adjusting the connection positions of beams and longitudinal beams, and then re-splicing and fixing them, without causing excessive damage to the entire building structure or affecting its overall stability; the connection operation between multiple double T-plate bodies and beams is simple and fast, which can greatly improve the installation efficiency; for example, in the construction of the ceiling of a large industrial plant or warehouse, many prefabricated double T-plates can be quickly spliced ​​into a large-area roof component, reducing construction time and labor costs.

[0030] (2) During the use of the present invention, the main body of the double T-board is connected to the insertion rod on the crossbeam through the socket on the rib beam, and the insertion tube under the panel cooperates with the insertion rod 2, so that the double T-board can be effectively constrained in the horizontal and vertical directions, avoiding forward and backward movement and up and down shaking. The crossbeam can be connected to multiple double T-board main bodies in the front, back, left and right at the same time through structures such as the insertion rod, forming a stable spatial structural network, further enhancing the stability of the structure, so that it can withstand larger loads, such as the weight of the roof, wind and snow loads, etc.

[0031] (3) During the use of the present invention, the adjacent double T-plate bodies are sealed by the combination of the panels and the base plate; the tenon blocks under the panels interact with the anchor rods during the installation process, causing the anchor rods to bend and deform, thereby firmly connecting the panels to the two side panels. At the same time, the base plate is fixed to the longitudinal beams through the connection of the vertical rods 1, 2 and the screw barrel, and is stably placed between the panels under the support of the bracket; the sealed connection method effectively prevents the leakage of liquids such as rainwater, ensuring the dryness and safety of the interior of the building.

[0032] (4) The metal panels of the present invention have good welding properties, which provides convenience for installing photovoltaic panels, antenna equipment, etc. on the roof composed of the double T-panel main body; the supporting structure can be directly welded on the surface of the panel for fixed installation, without the need for additional complex connection operations and devices such as punching.

[0033] (5) The large-span prefabricated double-T slabs of the present invention are prepared by using sulfate-resistant cement and adding ultrafine mineral powder and silica fume mineral admixtures, which effectively fill the pores of concrete, greatly reduce the intrusion channels of corrosive media, and enhance the corrosion resistance of the concrete matrix; stainless steel bars are matched with epoxy coatings to provide double protection for the double-T slabs from the inside, effectively resisting steel bar corrosion. The composite protection measures can significantly extend the service life of the structure; calcium nitrite preservatives form a protective film inside the concrete, further preventing the erosion of external corrosive substances, so that the double-T slabs can still maintain good structural integrity in harsh chemical corrosion environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0035] Figure 1 This is a schematic diagram of the connection structure of the corrosion-resistant large-span prefabricated double T-plate;

[0036] Figure 2 This is a schematic structural diagram of the double T-plate body of the present invention;

[0037] Figure 3 It is a schematic cross-sectional view of the present invention;

[0038] Figure 4 For the present invention Figure 3 The schematic diagram of the structure after enlarging at A in the middle;

[0039] Figure 5 It is a right side cross-sectional structural schematic diagram of the present invention;

[0040] Figure 6 This is a bottom view of the bottom plate of the present invention.

[0041] In the figure: 1. Double T-plate body; 2. Panel; 3. Rib; 4. Side groove; 5. Socket; 6. Insertion tube; 7. Anchor rod; 8. Crossbeam; 9. Sink; 10. Slider; 11. Slide; 12. Insert rod 1; 13. Fixed plate; 14. Connecting rod 1; 15. Screw block; 16. Screw; 17. Insert rod 2; 18. Clamp; 19. Panel; 20. Bottom plate; 21. Through groove 1; 22. Through groove 2; 23. Protrusion; 24. Vertical rod 1; 25. Connecting frame; 26. Connecting rod 2; 27. Tenon; 28. Spring; 29. ​​Longitudinal beam; 30. Bottom block; 31. Vertical rod 2; 32. Screw tube; 33. Inner cavity; 34. Bracket. DETAILED DESCRIPTION

[0042] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that, unless there is a conflict, the embodiments and features in the embodiments of the present application can be combined with each other.

[0043] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0044] Reference Figure 2 A corrosion-resistant large-span prefabricated double-T plate includes a double-T plate body 1. The preparation process of the double-T plate body 1 is as follows:

[0045] S1. Raw material selection and processing

[0046] Cement: Use sulfate-resistant cement; the mineral components in sulfate-resistant cement can effectively resist the erosion of sulfate ions, reducing the damage to the concrete structure caused by chemical corrosion. Ultrafine mineral powder and silica fume mineral admixtures are added to the cement to fill the pores inside the concrete, improve the density of the concrete, and reduce the penetration channels of corrosive media.

[0047] Aggregate: Coarse aggregate should be hard and well-graded crushed stone; fine aggregate should be medium sand, and the mud content should be strictly controlled within 3% to reduce the impact of impurities on the corrosion resistance of concrete;

[0048] Admixtures: Add an appropriate amount of high-efficiency water-reducing agent to improve the workability of concrete and reduce water consumption; add air-entraining agent to introduce tiny bubbles to improve the freeze-thaw resistance and anti-permeability of concrete; add calcium nitrite preservative to form a protective film inside the concrete to prevent the intrusion of corrosive media;

[0049] Steel bars: stainless steel bars are used and epoxy coating is applied on the surface of the steel bars. The coating thickness should generally be between 180-300μm.

[0050] S2. Steel skeleton production: Process the corrosion-resistant steel bars into steel skeletons; first straighten and remove rust from the steel bars to ensure their straightness and surface cleanliness;

[0051] S3. Concrete mixing: First, put the aggregate, cement and admixture into the mixer and dry mix for 1-2 minutes to fully mix the materials, then add water and continue mixing for 3-5 minutes until the concrete reaches a uniform working state;

[0052] S4. Concrete pouring: Pour the mixed concrete into the mold and pour it in layers. The thickness of each layer should be controlled between 30-50cm to ensure the density of the concrete. Vibrate and compact it after correction.

[0053] S5. Curing measures: Use steam curing method, control the curing temperature between 60-80℃, and keep the relative humidity above 90%; during the curing process, control the heating and cooling speeds to no more than 15℃ / h and 10℃ / h, to avoid cracks in the concrete due to temperature stress;

[0054] S6. Demoulding: When the concrete strength reaches about 70% of the design strength, demoulding is carried out. When demoulding, the side moulds are first removed, and then the double T-plate is lifted out of the bottom mould using a lifting device.

[0055] S7. Anti-corrosion coating construction: Apply anti-corrosion coating on the surface of double T-plate to further enhance its corrosion resistance; polyurethane paint is used for anti-corrosion coating;

[0056] Based on the above preparation process, the large-span prefabricated double T-plate has good corrosion resistance.

[0057] Reference Figure 1-6 , a connection structure of a corrosion-resistant large-span prefabricated double T-plate, comprising two double T-plate bodies 1 and two cross beams 8. The double T-plate body 1 comprises a panel 2, and two rib beams 3 are integrally formed at the bottom of the panel 2. Side grooves 4 are provided on the left and right sides of the upper surface of the panel 2, and two insertion holes 5 are provided on the opposite sides of the two rib beams 3. Insert cylinders 6 are symmetrically fixed on the lower surface of the panel 2, and two anchor rods 7 are fixed on the lower surface inside the side groove 4. The anchor rods 7 are pre-buried when the double T-plate body 1 is cast; the two cross beams 8 are located below the two double T-plate bodies 1, and a sinking groove 9 is provided on the upper surface of the cross beam 8. Four sliders 10 are slidably connected inside the sinking groove 9. The four sliders 10 are divided into two groups, and the opposite ends of the two sliders 10 in each group are fixed with a slide 11. The slide 11 is located on the upper surface of the cross beam 8, and the two slides 11 are located between the two rib beams 3. Two insertion rods 12 are fixed on the opposite ends of the two slides 11, and fixed plates are fixed on the opposite sides of the two slides 11. The two ends of the two connecting rods 14 are rotatably connected to the screw block 15, and the screw block 15 is threadedly connected to the screw block 15. The bottom end of the screw 16 passes through the lower surface of the cross beam 8, and the upper surface of the screw block 15 is fixed with two plug rods 2 17. The end of the slider 10 away from the slide 11 is fixed with a card plate 18. The screw block 15 is raised by rotating the screw 16. When it rises, the plug rod 2 17 rises and is inserted into the inside of the insertion tube 6, and the sliders 10 and the slide 11 on both sides are pushed back by the connecting rod 14 to move backwards, so that the plug rod 12 is inserted into the inside of the insertion hole 5, and the moving card plate 18 limits the longitudinal beam 29. The cross beam 8 can be connected to multiple double T-plate bodies 1 in the front, back, left and right at the same time through the plug rod, so that multiple double T-plate bodies 1 are connected to form a ceiling or roof component with a larger area, providing a more convenient prefabricated splicing installation structure to improve stability and installation efficiency.

[0058] The two adjacent side grooves 4 are provided with a common puzzle board 19, and a bottom plate 20 is provided between the two panels 2 below the puzzle board 19. A through groove 1 21 is provided on the lower surface of the bottom plate 20, and two through grooves 2 22 are provided on the lower surface of the bottom plate 20. An inner cavity 33 is provided inside the bottom plate 20, and the inner cavity 33 is connected with the two through grooves 22 and the through groove 1 21 respectively. A protrusion 23 is fixed on the top of the bottom plate 20, and the top of the protrusion 23 passes through the through groove 1 21 to the inside of the inner cavity 33. The tops of the two anchor rods 7 pass through the through groove 22 to the inside of the inner cavity 33. A vertical rod 1 24 is fixed on the upper surface of the inner cavity 33. The top of the vertical rod 1 24 passes through the bottom of the bottom plate 20, and the outer surface of the vertical rod 1 24 is located at A connecting frame 25 is slidably connected above the protrusion 23, and a connecting rod 26 is fixed on the left and right ends of the connecting frame 25. The end of the connecting rod 26 away from the connecting frame 25 is rotatably connected to a tenon 27, and the two adjacent panels 2 on the left and right are connected by the puzzle 19, and the puzzle 19 connects the double T-board bodies 1 on both sides through the anchor rod 7; and when the puzzle 19 is spliced ​​with the base plate 20, the prefabricated double T-board body 1 is sealed and connected, thereby improving the waterproof effect and ensuring the surface flatness of the panel 2. When it is necessary to install photovoltaic panels and antenna equipment on the roof composed of the double T-board body 1 in the future, the metal puzzle 19 can directly weld the supporting structure on the surface of the puzzle 19 for fixed installation.

[0059] Reference Figure 2 , the plug rod 12 is plugged into the socket 5, and the plug rod 2 17 is plugged into the plug tube 6. Through the plug rod 12 and the socket 5, and the plug rod 2 17 and the plug tube 6, the double T-plate body 1 cannot move forward and backward.

[0060] Reference Figure 2 The upper surface of the two cross beams 8 is provided with a longitudinal beam 29, and the longitudinal beam 29 is located below the bottom plate 20. A vertical rod 2 31 is fixed on the upper surface of the longitudinal beam 29, and a screw barrel 32 is threadedly connected to the upper surface of the outer surface of the vertical rod 21. The inside of the screw barrel 32 is threadedly connected to the bottom end of the vertical rod 1 24. The outer surface of the vertical rod 1 24 is located below the bottom plate 20 and is sleeved with a bracket 34. The lower surface of the bracket 34 fits with the upper surface of the screw barrel 32. The vertical rod 1 24 and the vertical rod 2 31 are connected through the screw barrel 32, so that the puzzle board 19 is connected to the longitudinal beam 29, and under the support of the screw barrel 32 and the bracket 34, the bottom plate 20 is stably placed between the two panels 2.

[0061] Reference Figure 1-5 The longitudinal beam 29 is fixed with bottom blocks 30 at the front and rear ends. The two bottom blocks 30 are respectively located inside the two sinking grooves 9. The bottom blocks 30 prevent the longitudinal beam 29 from moving forward and backward when it cannot be raised, thereby stably connecting the front and rear cross beams 8.

[0062] Reference Figure 3-4The outer surface of the tenon block 27 fits with the inner surface of the inner cavity 33. The tenon block 27 has a triangular prism structure. The tenon block 27 is located between the two anchor rods 7. Under the squeezing and pushing of the tenon block 27, the rod sections of the anchor rods 7 located inside 33 on the front and rear sides are bent and deformed, so that the two anchor rods 7 cannot escape from the inner cavity 33 through the second through groove 22, thereby connecting the puzzle board 19 to the panels 2 on both sides.

[0063] Reference Figure 4 A spring 28 is sleeved on the outer surface of the vertical rod 1 24 above the connecting frame 25. When the protrusion 23 disengages from the inner cavity 33 and the connecting frame 25 loses its limit, the compressed spring 28 will push the connecting frame 25 down along the vertical rod 1 24, thereby moving the two tenons 27 away from the anchor rod 7 through the connecting rod 2 26.

[0064] Reference Figure 1 The card plate 18 is an L-shaped structure, and the inner side of the card plate 18 fits the outer surface of the longitudinal beam 29. The card plate 18 limits the longitudinal beam 29 so that it cannot move up or left and right, so that it can be placed stably.

[0065] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A corrosion-resistant large-span prefabricated double T-plate connection structure, comprising two double T-plate bodies (1) and two crossbeams (8), characterized in that: The double T-plate body (1) includes a panel (2), two ribs (3) are integrally formed at the bottom of the panel (2), side grooves (4) are provided on the left and right sides of the upper surface of the panel (2), two insertion holes (5) are provided on the opposite sides of the two ribs (3), and insert cylinders (6) are symmetrically fixed on the lower surface of the panel (2), and two anchor rods (7) are fixed on the lower surface of the side groove (4); the two cross beams (8) are located below the two double T-plate bodies (1), the upper surface of the cross beams (8) is provided with a sinking groove (9), and four sliders (10) are slidably connected inside the sinking groove (9), and the four sliders (10) are divided into two groups, and the two sliders (10) in each group are fixed with a slide (11) at the opposite ends, and the slide (11) is located on the upper surface of the crossbeam (8), the two slides (11) are located between the two rib beams (3), the two slides (11) are fixed with two insertion rods (12) at opposite ends, the two slides (11) are fixed with fixed plates (13) at opposite sides, the fixing plates (13) are internally connected to the connecting rod (14) for rotation, the two connecting rods (14) are rotatably connected to the opposite ends of the screw blocks (15), the screw blocks (15) are internally threaded with screw rods (16), the bottom ends of the screw rods (16) pass through the lower surface of the crossbeam (8), the upper surface of the screw blocks (15) are fixed with two insertion rods (17), and the end of the slider (10) away from the slide (11) is fixed with a clamping plate (18); Two adjacent side grooves (4) are provided with a common panel (19) inside, and a bottom plate (20) is provided below the panel (19) and between the two panels (2). A through groove 1 (21) is provided on the lower surface of the bottom plate (20), and two through grooves 2 (22) are provided on the lower surface of the bottom plate (20). An inner cavity (33) is provided inside the bottom plate (20), and the inner cavity (33) is respectively connected to the two through grooves 2 (22) and the through groove 1 (21). A convex block (23) is fixed on the top of the bottom plate (20), and the top of the convex block (23) passes through the through groove 1. (21) penetrates into the inner cavity (33), the top ends of the two anchor rods (7) pass through the inner cavity (33) through the through groove 2 (22), a vertical rod 1 (24) is fixed to the upper surface of the inner cavity (33), the top end of the vertical rod 1 (24) penetrates to the bottom of the bottom plate (20), the outer surface of the vertical rod 1 (24) is located above the protrusion (23) and is slidably connected to a connecting frame (25), the left and right ends of the connecting frame (25) are fixed with a connecting rod 2 (26), and the end of the connecting rod 2 (26) away from the connecting frame (25) is rotatably connected to a tenon (27).

2. The corrosion-resistant large-span prefabricated double T-plate connection structure according to claim 1, characterized in that: The first plug rod (12) is plugged into the socket (5), and the second plug rod (17) is plugged into the plug tube (6).

3. The corrosion-resistant large-span prefabricated double T-plate connection structure according to claim 1, characterized in that: A longitudinal beam (29) is provided on the upper surface of the two transverse beams (8), and the longitudinal beam (29) is located below the bottom plate (20). A second vertical rod (31) is fixed on the upper surface of the longitudinal beam (29), and a screw barrel (32) is threadedly connected above the outer surface of the second vertical rod (31). The interior of the screw barrel (32) is threadedly connected to the bottom end of the first vertical rod (24). The outer surface of the first vertical rod (24) is located below the bottom plate (20) and is sleeved with a bracket (34), and the lower surface of the bracket (34) is in contact with the upper surface of the screw barrel (32).

4. The connection structure of the corrosion-resistant large-span prefabricated double T-plate according to claim 3 is characterized by: Bottom blocks (30) are fixed to the front and rear ends of the longitudinal beam (29), and the two bottom blocks (30) are respectively located inside the two sinking grooves (9).

5. The connection structure of the corrosion-resistant large-span prefabricated double T-plate according to claim 1 is characterized by: The outer surface of the tenon block (27) fits the inner surface of the inner cavity (33), the tenon block (27) is in a triangular prism structure, and the tenon block (27) is located between the two anchor rods (7).

6. The corrosion-resistant large-span prefabricated double T-plate connection structure according to claim 1, characterized in that: The outer surface of the vertical rod (24) is located above the connecting frame (25) and is sleeved with a spring (28).

7. The connection structure of the corrosion-resistant large-span prefabricated double T-plate according to claim 3 is characterized by: The clamping plate (18) is an L-shaped structure, and the inner side of the clamping plate (18) is in contact with the outer surface of the longitudinal beam (29).

Images