Steel corrugated plate-concrete connecting system

Abstract

The utility model relates to a steel corrugated plate-concrete connecting system which comprises steel corrugated plates, shearing force connecting pieces and filling concrete. The shearing force connecting piece comprises an anti-pulling steel bar, a lap joint transverse bar, a pre-welding pressing piece and an upper pressing nut. The lower part of the anti-pulling steel bar is provided with a bar body, and the upper end is a multi-shaped anti-pulling head; a transverse rib is arranged in the middle of the rod body, a pre-welding pressing piece and external threads are arranged on the lower portion of the rod body, and an upper pressing nut and an anti-disengaging nut are arranged through the external threads; the shearing force connecting pieces are installed at the bottoms of wave troughs of the steel corrugated plates through through holes, the pre-welding pressing pieces abut against the upper end faces of the steel corrugated plates, the upper pressing nuts abut against the lower end faces of the steel corrugated plates, and the lap joint transverse ribs abut against the two sides of the wave troughs and are welded and fixed. And the concrete is filled to cover the multi-shaped anti-pulling head of the shear connector, so that the binding force and the anti-pulling performance of the steel corrugated plate and the concrete are enhanced. The utility model discloses. An efficient and reliable steel corrugated plate-concrete connecting system is provided, and the shearing force transmission performance and the structural stability are remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel corrugated plates, and specifically, to a steel corrugated plate-concrete connection system. Background Art

[0002] Steel corrugated plates are a new type of building material widely used in engineering fields such as bridges, culverts, tunnels, and underground pipe galleries. Steel corrugated plates have high strength and good adaptability to deformation, and can effectively resist external loads and environmental changes. However, with the increase in the scale and complexity of projects, the single steel corrugated plate structure gradually exposes problems of insufficient tensile and compressive performance when applied to larger spans and thicker soil layers.

[0003] In order to improve the bearing capacity of the steel corrugated plate structure, common methods are to increase the thickness of the steel corrugated plate or adopt a multi-layer structure. Although these methods can improve the strength of the structure to a certain extent, they also bring problems such as increased material consumption, increased construction complexity, and increased costs. Therefore, the steel corrugated plate-concrete composite structure has become an important solution. By jointly acting the steel corrugated plate and concrete, the advantages of both can be fully exerted, and the strength and stiffness of the overall structure can be significantly improved.

[0004] In the steel corrugated plate-concrete composite structure, shear connectors, as key components, play the roles of connecting the steel corrugated plate and concrete, transferring shear force, and enhancing the stability of the overall structure. At present, commonly used shear connectors mainly include stud connectors and profiled steel connectors. These connectors are usually fixed on the steel corrugated plate by welding or mechanical connection methods and are poured in concrete to form a whole. However, traditional shear connectors are not applicable to steel corrugated plates because the corrugated structure of steel corrugated plates makes the welding process complex and prone to welding defects, reducing the reliability of the connection.

[0005] Therefore, there is an urgent need for an improved steel corrugated plate-concrete connection system to further improve the shear force transfer performance and overall stability of the steel corrugated plate-concrete composite structure. Summary of the Invention

[0006] The utility model proposes a steel corrugated plate-concrete connection system to solve the problems in the prior art.

[0007] To achieve the above object, the technical solution proposed by the utility model is:

[0008] A steel corrugated plate - concrete connection system includes a steel corrugated plate, shear connectors, and filled concrete; the shear connectors include anti - pull steel bars, overlapping transverse bars, pre - welded pressing pieces, and upper pressing nuts. The anti - pull steel bars include a rod body at the lower part and a multi - shaped anti - pull head at the upper end of the rod body. A transverse bar is arranged in the middle of the rod body, a pre - welded pressing piece is arranged at the lower part of the rod body, an external thread is arranged at the lower part of the rod body, and an upper pressing nut is arranged on the lower part of the rod body through the external thread. The upper pressing nut is located below the pre - welded pressing piece;

[0009] A number of through - holes are opened at the bottoms of several wave troughs of the steel corrugated plate, and the shear connectors are connected in the through - holes. The lower part of the rod body of the shear connector passes through the through - hole, the pre - welded pressing piece abuts against the upper end face of the steel corrugated plate, the upper pressing nut is arranged at the lower part of the rod body, and the upper pressing nut abuts against the lower end face of the steel corrugated plate. The overlapping transverse bar abuts against both sides of the wave trough of the steel corrugated plate;

[0010] The filled concrete is located above the steel corrugated plate and covers the multi - shaped anti - pull head of the shear connector.

[0011] Further, the multi - shaped anti - pull head is an L - shaped structure.

[0012] Further, the multi - shaped anti - pull head is a T - shaped structure.

[0013] Further, the multi - shaped anti - pull head is a cross - shaped structure.

[0014] Further, a sealing gasket is arranged between the pre - welded pressing piece and the steel corrugated plate.

[0015] Further, after the overlapping transverse bar abuts against both sides of the wave trough of the steel corrugated plate, it is welded and fixed.

[0016] Further, the upper pressing nut is a self - locking nut.

[0017] Further, within the wave trough bottom, the several through - holes are evenly distributed along the extending direction of the wave trough.

[0018] Further, an anti - detachment nut is arranged above the pre - welded pressing piece.

[0019] Further, the waveform of the steel corrugated plate is a sine wave form, a triangular corrugation form, a trapezoidal corrugation form, or a right - angled corrugation form.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The utility model provides an efficient and reliable steel corrugated plate-concrete connection system, which significantly improves the shear transfer performance and structural stability. By adopting the design of anti-pulling steel bars and their multi-shaped anti-pulling heads, the bonding force and anti-pulling performance between the steel corrugated plate and the concrete are enhanced; the use of overlapping transverse ribs and pre-welded pressing pieces further improves the strength and stability of the connection. At the same time, a sealing gasket is arranged between the pre-welded pressing piece and the steel corrugated plate to prevent concrete leakage; in one embodiment of the utility model, the self-locking nut effectively prevents the loosening of the connecting piece during use, ensuring the long-term stability of the structure; the shear connectors are evenly distributed along the wave troughs, optimizing the load transfer effect; in addition, the various waveform designs of the steel corrugated plate of the utility model can adapt to different engineering requirements, further improving the overall structural performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. is a schematic structural view of the shear connector in Embodiment 1 of the utility model;

[0023] Figure 2 FIG. is a schematic structural view of the shear connector in Embodiment 2 of the utility model;

[0024] Figure 3 is Figure 2 front view of;

[0025] Figure 4 FIG. is a schematic connection view of the shear connector in Embodiment 2 of the utility model and the steel corrugated plate;

[0026] Figure 5 is Figure 4 side view of.

[0027] In the figure, 1-steel corrugated plate, 2-shear connector, 201-anti-pulling steel bar, 202-overlapping transverse rib, 203-pre-welded pressing piece, 204-anti-loosening nut 205-upper pressing nut, 206-L-shaped anti-pulling head, 207-T-shaped anti-pulling head. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are given in the drawings. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present utility model can be understood more thoroughly and comprehensively.

[0029] In the description of this patent, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this patent.

[0030] In the description of this patent, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "joined", "set" shall be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0031] Embodiment 1:

[0032] The embodiment of the present utility model provides a steel corrugated plate-concrete connection system, which includes a steel corrugated plate, shear connectors, and filled concrete. In this embodiment, a steel corrugated plate with a sinusoidal wave form is selected, the plate thickness is 6 mm, the height of the wave crest and wave trough is 50 mm, and the wavelength is 200 mm. A number of through holes with a diameter of 20 mm are opened at the bottom of each wave trough of the steel corrugated plate. The through holes are evenly distributed along the extension direction of the wave trough, with a spacing of 150 mm, and the shear connectors 2 are arranged in the through holes.

[0033] See Figure 1 , in this embodiment, the shear connector 2 includes a pull-out steel bar 201, a lap transverse bar 202, a pre-welded pressing sheet 203, and an upper pressing nut 205. The length of the pull-out steel bar 201 is 300 mm, the diameter of the lower rod body is 16 mm, and a T-shaped pull-out head 207 is provided at the upper end. Each arm length of the T-shaped pull-out head 207 is 50 mm and is integrally formed with the rod body. A transverse bar with a diameter of 10 mm is arranged in the middle of the rod body, and the length of the transverse bar is 150 mm. After passing through the pull-out steel bar, it is welded and fixed. The pre-welded pressing sheet 203 is a circular sheet with a diameter of 40 mm and a thickness of 6 mm, which is welded on the rod body. The surface of the pre-welded pressing sheet 203 is provided with a concave-convex friction surface structure to increase the contact area and friction force with the steel corrugated plate. The upper pressing nut 205 is a self-locking nut with a diameter of 20 mm, which is installed on the external thread at the lower part of the pull-out steel bar and is located below the pre-welded pressing sheet 203.

[0034] Pass the uplift steel bar of the shear connector through the through-hole at the bottom of the trough of the steel corrugated plate, make the pre-welded pressing piece abut against the upper end face of the steel corrugated plate, and by tightening the upper pressing nut, make the upper pressing nut in close contact with the lower end face of the steel corrugated plate to ensure that the shear connector is firmly fixed on the steel corrugated plate. After the overlapping transverse bars are abutted against both sides of the trough of the steel corrugated plate, they are welded and fixed to further enhance the connection strength and stability between the shear connector and the steel corrugated plate.

[0035] Above the installed steel corrugated plate and shear connector, concrete is poured. High-performance concrete with a compressive strength of more than 40 MPa is selected to ensure that the concrete covers all the multi-shaped uplift heads of the shear connectors and is completely embedded in the concrete to form an integral structure. At the same time, a sealing gasket is placed between the pre-welded pressing piece and the steel corrugated plate to prevent slurry leakage during the concrete pouring process.

[0036] After the concrete pouring is completed, standard curing is carried out to ensure a firm bond between the concrete, the steel corrugated plate and the shear connector, forming a high-strength integral structure. Through these steps, the steel corrugated plate-concrete connection system provided by the present utility model, by using the design of uplift steel bars and multi-shaped uplift heads, the use of overlapping transverse bars and pre-welded pressing pieces, combined with self-locking nuts and uniformly distributed through-holes, significantly improves the bonding force, uplift resistance and structural stability between the steel corrugated plate and the concrete, and is applicable to engineering applications such as bridges, tunnels, and underground pipe galleries.

[0037] Embodiment 2:

[0038] See Figure 1 and Figure 2 As shown in and, another embodiment of the present utility model provides a steel corrugated plate-concrete connection system, which includes a steel corrugated plate 1, a shear connector 2 and filled concrete; the same as Embodiment 1, the steel corrugated plate 1 with a sine wave form is selected, the plate thickness is 6 mm, the height of the wave crest and the wave trough is 50 mm, and the wavelength is 200 mm; a number of through-holes with a diameter of 20 mm are opened at the bottom of each trough of the steel corrugated plate 1, and the through-holes are evenly distributed along the extension direction of the trough, with a spacing of 150 mm, and the shear connector 2 is arranged in the through-holes.

[0039] See Figure 3 and Figure 4, in this embodiment, the shear connector 2 includes an uplift steel bar 201, a lapping transverse bar 202, a pre-welded pressing piece 203, an anti-loosening nut 204, and an upper pressing nut 205; the length of the uplift steel bar 201 is 300 mm, the diameter of the lower bar body is 16 mm, and an L-shaped uplift head 206 is provided at the upper end. The bending arm length of the L-shaped uplift head 206 is 50 mm and is integrally formed with the bar body. A lapping transverse bar 202 with a diameter of 10 mm is provided in the middle of the bar body. The lapping transverse bar 202 has a length of 150 mm, passes through the bar body and is fixed by welding; the pre-welded pressing piece 203 is a square piece with a side length of 30 mm and a thickness of 6 mm. After installing the anti-loosening nut 204, it is welded to the bar body. The surface of the pre-welded pressing piece 203 is provided with a concave-convex friction surface structure to increase the contact area and friction force with the steel corrugated plate.

[0040] Pass the uplift steel bar of the shear connector 2 through the through hole at the bottom of the wave trough of the steel corrugated plate 1, so that the pre-welded pressing piece 203 abuts against the upper end surface of the steel corrugated plate; an external thread is preset at the lower part of the uplift steel bar 201, and the anti-loosening nut 204 and the upper pressing nut 205 are sequentially arranged through the external thread; the anti-loosening nut 204 is located above the pre-welded pressing piece 203, and the upper pressing nut 205 is located below the pre-welded pressing piece 203. By tightening the upper pressing nut 205, the upper pressing nut 205 is in close contact with the lower end surface of the steel corrugated plate 1 to ensure that the shear connector is firmly fixed on the steel corrugated plate; after the lapping transverse bar 202 abuts against both sides of the wave trough of the steel corrugated plate 1, it is welded and fixed to further enhance the connection strength and stability between the shear connector 2 and the steel corrugated plate 1.

[0041] Above the installed steel corrugated plate 1 and shear connector 2, concrete is poured. High-performance concrete with a compressive strength of more than 40 MPa is selected to ensure that the concrete covers all the L-shaped uplift heads 206 of the shear connectors 2 and is completely embedded in the concrete to form an integral structure; at the same time, in this embodiment, a sealing gasket is placed between the pre-welded pressing piece 203 and the steel corrugated plate 1 to prevent slurry leakage during the concrete pouring process.

[0042] After the concrete pouring is completed, standard curing is carried out to ensure the firm combination between the concrete, the steel corrugated plate and the shear connector, and a high-strength integral structure is formed; through these steps, the steel corrugated plate-concrete connection system provided in this embodiment, by using the design of the L-shaped uplift head and the anti-loosening nut, further improves the bonding force, uplift performance and structural stability between the steel corrugated plate and the concrete, and is applicable to engineering applications such as bridges, tunnels, and underground pipe galleries.

[0043] Specifically, in a certain tunnel reinforcement project, the steel corrugated plate-concrete connection system of this embodiment was adopted. Due to the influence of long-term loads and geological movements on the tunnel structure, structural cracks and deformations occurred. By installing steel corrugated plates on the inner wall of the tunnel and using the above shear connectors, concrete was filled in the gap between the inner wall of the tunnel and the steel corrugated plates to form a tight bond, constituting an integrated reinforcement system. After standard curing, a firm bond was formed between the concrete, the steel corrugated plates, and the shear connectors, effectively improving the overall strength and stability of the tunnel structure and successfully achieving tunnel reinforcement.

[0044] For those of ordinary skill in the art of this technology, without departing from the principle of this utility model, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of this utility model.

Claims

1. A steel corrugated plate-concrete connection system, characterized in that: It comprises a steel corrugated plate, a shear connector and filled concrete; the shear connector comprises an anti-pulling steel rod, overlapping transverse reinforcement, a pre-welded pressing plate and an upper pressing nut; the anti-pulling steel rod comprises a rod body at the bottom and a multi-shaped anti-pulling head at the upper end of the rod body; a transverse reinforcement is arranged at the middle of the rod body; a pre-welded pressing plate is arranged at the bottom of the rod body; an external thread is arranged at the bottom of the rod body; an upper pressing nut is arranged at the bottom of the rod body through the external thread; and the upper pressing nut is located below the pre-welded pressing plate; A plurality of through holes are provided at the bottom of the plurality of troughs of the steel corrugated plate, the shear connector is connected in the through holes, the lower part of the rod body of the shear connector passes through the through holes, the pre-welded pressing sheet is pressed against the upper end surface of the steel corrugated plate, an upper pressing nut is provided at the lower part of the rod body, the upper pressing nut is pressed against the lower end surface of the steel corrugated plate, and the overlapping transverse ribs are pressed against both sides of the trough of the steel corrugated plate; The filling concrete is located above the steel corrugated plate and covers the multi-shaped anti-pullout heads of the shear connector.

2. The steel corrugated plate-concrete connection system according to claim 1, characterized in that: The multi-shaped anti-pulling head is an L-shaped structure.

3. The steel corrugated plate-concrete connection system according to claim 1, characterized in that: The multi-shaped anti-pulling head is a T-shaped structure.

4. The steel corrugated plate-concrete connection system according to claim 1, characterized in that: The multi-shaped anti-pulling head is a cross-shaped structure.

5. The steel corrugated plate-concrete connection system according to claim 1, characterized in that: A sealing gasket is arranged between the pre-welded pressing sheet and the steel corrugated plate.

6. The steel corrugated plate-concrete connection system according to claim 1, characterized in that: The overlapping transverse ribs are pressed against both sides of the trough of the steel corrugated plate and then welded and fixed.

7. The steel corrugated plate-concrete connection system according to claim 1, characterized in that: The upper pressure nut is a self-locking nut.

8. The steel corrugated plate-concrete connection system according to claim 1, characterized in that: In the bottom of the trough, the plurality of through holes are evenly distributed along the extension direction of the trough.

9. The steel corrugated plate-concrete connection system according to claim 1, characterized in that: An anti-dropping nut is arranged above the pre-welding pressing sheet.

10. The steel corrugated plate-concrete connection system according to claim 1, characterized in that: The waveform of the steel corrugated plate is a sinusoidal wave form, a triangular wave form, a trapezoidal wave form or a right-angle wave form.

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