A corrugated steel plate profile support system and construction method

Abstract

The present invention relates to the technical field of bridges, and specifically to a corrugated steel plate profiled steel support system and a construction method; the support system is installed between the webs of the main beams, and the corrugated steel plates and the bridge deck concrete cast on the corrugated steel plates are supported by the support system, and the characteristics are: the support system is composed of a number of transverse square steels and longitudinal square steels installed with each other, the two ends of the transverse square steels are connected between the main beam top plate and the main beam web by connecting plates, the corrugated steel plates are placed on the main beam top plate and the longitudinal square steels, and the bridge deck concrete is cast on the corrugated steel plates. The corrugated steel plate profiled steel support system has the characteristics of simple structure, lightness, reliability, and easy installation. Without greatly increasing the amount of materials and construction measures, it provides effective support for the weaker corrugated steel plates, and ensures the structural performance of the corrugated steel plate composite bridge deck. The system can be widely used in the support structure of various types of corrugated steel plate composite panels.

Description

Technical Field

[0001] The invention relates to the technical field of bridges, and in particular to a corrugated steel plate steel support system and a construction method. Background Art

[0002] Corrugated steel sheet is a steel sheet formed by cold-bending a coated sheet or a plated sheet by roller pressing to form a corrugated cross-section along the width of the sheet. Corrugated steel sheet is widely used in the fields of industrial and civil construction and road and bridge engineering construction. The thickness of the corrugated steel sheet is relatively thin, with a common thickness of 0.4 to 1.6 mm; when used in load-bearing structures, the thickness reaches 2 to 3 mm or more. At present, the commonly used cross-section forms of corrugated steel sheet in the composite bridge deck of corrugated steel sheet are open type and closed type.

[0003] The combination of corrugated steel sheet and concrete can be used as a composite floor or composite bridge deck, which saves the need for formwork erection. As a load-bearing structure, it has good structural performance and is widely used in composite structures. The combined effect between corrugated steel sheet and concrete is mainly achieved by the longitudinal shear strength along the force direction of the plate generated by the bonding effect between them. The combined effect with concrete plays the advantages of steel plate tensile resistance and concrete compression resistance, and can also improve the section stiffness. In engineering practice, corrugated steel sheet is mostly used as a permanent formwork and as a safety reserve for the structure.

[0004] Composite bridge decks made of corrugated steel plates have the characteristics of fast construction, material saving, light structure and beautiful appearance. Especially when composite bridge decks made of corrugated steel plates are used together with steel box girders, the economic benefits are remarkable. They are widely used in current engineering practices. However, the design and construction of composite bridge decks must be within a reasonable span range, otherwise the composite bridge decks will be deformed too much and prone to cracking.

[0005] Traditional corrugated steel plates have relatively small spans, so there is no intermediate support system, or the support structure is too complicated, which can easily cause the deformation of the corrugated steel plates, waste of materials, and cumbersome construction. When open-type corrugated steel plates are used as the bridge deck structure of composite beams, and the distance between the main beams is large, if the intermediate support system is not used, the strength and rigidity of the corrugated steel plates themselves cannot bear all the post-poured concrete loads. Therefore, the concrete on the corrugated steel plates is often poured in two times in the project. When the strength of the first-phase concrete poured reaches the design requirements, the remaining second-phase concrete is poured. Although this construction method is feasible, it also increases the construction process, prolongs the construction period, and significantly reduces the construction quality assurance. Summary of the invention

[0006] In order to overcome the shortcomings of the existing corrugated steel plate installation, the present invention provides a corrugated steel plate profiled steel support system and a construction method. The corrugated steel plate profiled steel support system has the characteristics of simple structure, lightness, reliability, easy installation, etc., and provides effective support for the weaker corrugated steel plates without greatly increasing the amount of materials and construction measures, thereby ensuring the structural performance of the corrugated steel plate composite bridge deck. The system can be widely used in the support structure of various types of corrugated steel plate composite panels, expanding the use scope of the corrugated steel plates, and enabling the corrugated steel plates to fully play the role of the bottom mold of the cast-in-place bridge deck, thereby having a good application prospect.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] A corrugated steel plate support system is provided, wherein the support system is installed between the webs of the main beams, and the corrugated steel plates and the bridge deck concrete 9 poured on the corrugated steel plates are supported by the support system. The support system is composed of a plurality of transverse square steels 1 and longitudinal square steels 2 installed with each other, wherein the two ends of the transverse square steels 1 are connected between the main beam top plate 5 and the main beam webs through connecting plates 4, and the corrugated steel plates are placed on the main beam top plate 5 and the longitudinal square steels 2, and the bridge deck concrete 9 is poured on the corrugated steel plates.

[0009] The transverse square steel 1 and the longitudinal square steel 2 are welded and connected through a saddle-shaped connecting plate 3 . The transverse square steel 1 is welded at the opening of the saddle-shaped connecting plate 3 , and a longitudinal square steel 2 is welded at each of the two side limbs of the saddle-shaped connecting plate 3 .

[0010] A rubber pad 7 is installed on the saddle-shaped connecting plate 3 , and after installation, the height of the rubber pad 7 is the same as the height of the longitudinal square steel 2 .

[0011] The two ends of the transverse square steel 1 are nested and welded with connecting plates 4, and the transverse square steel 1 and the main beam top plate 5 and the main beam web are welded and fixed by the connecting plates 4.

[0012] The corrugated steel sheet includes an open corrugated steel sheet 6-1 and a closed corrugated steel sheet 6-2.

[0013] The main beam web includes a main beam corrugated web 8-1 and a main beam straight web 8-2.

[0014] A construction method of a corrugated steel plate steel support system comprises the following steps:

[0015] S1, vertically weld the connecting plate 4 to the bottom surface of the main beam top plate 5 and the side surface of the main beam web;

[0016] S2, embed the transverse square steel 1 into the connecting plates 4 on both sides and weld them;

[0017] S3, put the open side of the saddle-shaped connecting plate 3 on the mid-span position of the transverse square steel 1;

[0018] S4, repeat the above steps to arrange multiple transverse square steels 1 between the main beam top plates 5;

[0019] S5, welding the longitudinal square steel 2 to the saddle-shaped connecting plates 3 of two adjacent transverse square steels 1;

[0020] S6, installing rubber pad 7;

[0021] S7. Lay corrugated steel plates between the main beam top plates 5, and pour the bridge deck concrete 9 on the corrugated steel plates at one time.

[0022] The beneficial effects of the present invention are:

[0023] 1) The corrugated steel plate support system provided by the present invention has a simple structure and clear force. Without greatly increasing the amount of materials and construction measures, it provides effective support for the weaker corrugated steel plate and ensures the structural performance of the corrugated steel plate composite plate.

[0024] 2) The corrugated steel plate support system provided by the present invention has flexible and diverse usage forms and can be widely used in various types of corrugated steel plate composite bridge decks, including open-type corrugated steel plates and closed-type corrugated steel plates. The support system can be changed to longitudinal support or transverse support according to the type of corrugated steel plate and the direction of force. It has good applicability and versatility. At the same time, it adopts steel components, which are easy to manufacture and reliable in connection, can reduce costs, and produce better economic and technical benefits.

[0025] 3) The corrugated steel plate steel support system and construction method provided by the present invention greatly simplify the construction process of the composite beam, so that the corrugated steel plate composite bridge deck can be cast in one go, ensuring the construction quality. In addition, the corrugated steel plate steel support system has less welding workload, and the rods are easy to hoist, the assembly is simple, the construction steps are few, and the construction speed is fast, which improves the assembly construction efficiency of the composite bridge. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a stereogram of embodiment 1 of the present invention;

[0027] Figure 2 is a cross-sectional schematic diagram of embodiment 1 of the present invention;

[0028] Figure 3 It is a plan view of embodiment 1 of the present invention;

[0029] Figure 4 It is a plan view of the intermediate support connection of Example 1 of the present invention;

[0030] Figure 5 It is a schematic elevation view of the intermediate support connection of Example 1 of the present invention;

[0031] Figure 6 The open type corrugated steel plate composite bridge deck of embodiment 1 of the present invention;

[0032] Figure 7 Schematic diagram of the steel section and connecting plate of Example 1 of the present invention;

[0033] Figure 8 is a cross-sectional schematic diagram of embodiment 2 of the present invention;

[0034] Fig. 9 It is a plan view of Embodiment 2 of the present invention;

[0035] Fig.10 The closed-type corrugated steel plate composite bridge deck of Example 2 of the present invention;

[0036] As shown in the figure: 1. Horizontal square steel; 2. Longitudinal square steel; 3. Saddle-shaped connecting plate; 4. Main beam connecting plate; 5. Main beam top plate; 6-1. Open type corrugated steel plate; 6-2. Closed type corrugated steel plate; 7. Rubber pad; 8-1. Main beam corrugated web; 8-2. Main beam straight web; 9. Bridge deck concrete. DETAILED DESCRIPTION

[0037] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific embodiments:

[0038] Example 1

[0039] The present invention provides a corrugated steel plate support system and a construction method, the embodiment of the present invention comprises a transverse square steel 1; a longitudinal square steel 2; a saddle-shaped connecting plate 3; a main beam connecting plate 4; a main beam top plate 5; an open-type corrugated steel plate 6-1; a rubber pad 7; a main beam corrugated web 8-1; a bridge deck concrete 9; Figures 1 to 7 shown.

[0040] The corrugated steel plate steel support system and construction method described in the present invention are suitable for steel-concrete composite structure bridges with double main beams or multiple main beams. In this embodiment, a corrugated web steel box composite beam with a span of 30m is used in the form of a double main beam, and the distance between the two main beams is 3.5m. An open-type corrugated steel plate composite bridge deck is used between the main beam boxes. The open-type corrugated steel plates are arranged horizontally, and the bridge deck concrete needs to be poured once after the main beams are erected. In order to solve the problem that the strength and rigidity of the open-type corrugated steel plates between the boxes are not enough to withstand the wet weight of the concrete poured once, the corrugated steel plate steel support system described in this embodiment is set between the boxes to simplify the construction process and improve the quality of the composite bridge deck.

[0041] The main supporting structure of the corrugated steel plate support system described in this embodiment is a cross-shaped structure formed by multiple horizontally arranged square steels 1 and one vertically continuously arranged square steel 2.

[0042] Among them, the longitudinal square steel 2 directly bears the construction load transmitted by the concrete bridge deck 9 to the open corrugated steel plate 6-1, the top edge of the longitudinal square steel 2 is tightly fitted with the bottom edge of the open corrugated steel plate 6-1, and the longitudinal square steel 2 is placed in the mid-span position of the open corrugated steel plate 6-1.

[0043] Among them, the adjacent two sides of the longitudinal square steel 2 are overlapped on the transverse square steel 1 through the saddle-shaped connecting plate 3, and the overlap length is 50mm. The open side of the saddle-shaped connecting plate 3 is sleeved on the transverse square steel 1 and placed in the mid-span position of the transverse square steel 1.

[0044] Among them, the longitudinal square steel 2 is a rectangular steel with a height of 120mm, a width of 80mm, a wall thickness of 6mm and a length of 2260mm; the transverse square steel 1 is 100mm high, 100mm wide, and a wall thickness of 6mm. The arrangement spacing of the transverse square steel 1 in the transverse bridge direction is 2400mm.

[0045] Among them, the opening width of the saddle-shaped connecting plate 3 is 100mm, the height is 90mm, the extended limb width is 60mm, and the plate thickness is 10mm; the inner diameter of the saddle-shaped connecting plate 3 is consistent with the outer diameter of the transverse square steel 1, so that the saddle-shaped connecting plate 3 can fit tightly on the transverse square steel 1 and be welded to the transverse square steel 1.

[0046] The saddle-shaped connecting plate 3 is a cast steel component and can be uniformly customized in the factory according to the specified size.

[0047] The transverse square steel 1 of the corrugated steel plate support system described in this embodiment is welded to the main beam top plates 5 on both sides by the main beam connecting plates 4. The main beam connecting plates 4 are vertically welded to the bottom of the main beam top plates 5. The transverse square steel 1 is cut with a notch at the end so that the main beam connecting plates 4 are inserted into the transverse square steel 1 and welded to it.

[0048] Among them, the main beam connecting plate 4 is formed by cutting a corner of a rectangular steel plate, with a height of 200mm, a width of 150mm, and a plate thickness of 10mm. The top edge and side edges of the main beam connecting plate 4 are vertically welded to the main beam top plate 5 and the main beam corrugated web 8-1 of the corrugated web steel box main beam.

[0049] The longitudinal square steel 2 and the transverse square steel 1 of the corrugated steel plate support system described in this embodiment are of different heights and form a gap at the intersection in the middle of the span. A rubber pad 7 with the same height as the gap is pasted to the gap between two adjacent longitudinal square steels 2.

[0050] Among them, the length of the rubber pad 7 is 140mm, the width is the same as the longitudinal square steel 2, both are 80mm, and the thickness is 20mm. After the rubber pad 7 is installed at the notch, the top edges of the longitudinal square steel 2 are made at the same height to form a continuous supporting structure.

[0051] The construction method of a corrugated steel plate steel support system described in this embodiment is:

[0052] 1. Vertically weld the main beam connecting plate to the bottom surface of the main beam top plate and the side surface of the main beam corrugated web;

[0053] 2. Hoist the transverse square steel 1, insert the transverse square steel 1 with notches cut at the ends into the main beam connecting plates 4 on both sides of the main beam, and weld them together with the main beam connecting plates 4 after positioning;

[0054] 3. Put the open side of the saddle-shaped connecting plate 3 on the mid-span position of the transverse square steel 1 and weld it to it;

[0055] 4. Repeat the above steps to arrange multiple transverse square steels 1 between the main beams at the specified spacing;

[0056] 5. Overlap the longitudinal square steel 2 on the saddle-shaped connecting plates 3 of two adjacent transverse square steels 1 and weld them together;

[0057] 6. Install the rubber pad 7 at the middle support;

[0058] 7. Lay the box-type open-type corrugated steel plates 6-1 between the main beam top plates 5, and pour the bridge deck concrete 9 on the open-type corrugated steel plates 6-1 in one go, thereby completing the construction of the corrugated steel plate combined bridge deck.

[0059] Example 2

[0060] The present invention provides a corrugated steel plate support system and a construction method, the embodiment of the present invention comprises a transverse square steel 1; a longitudinal square steel 2; a saddle-shaped connecting plate 3; a main beam connecting plate 4; a main beam top plate 5; a closed-end corrugated steel plate 6-2; a rubber pad 7; a main beam straight web 8-2; a bridge deck concrete 9; Figures 8 to 10 shown.

[0061] The corrugated steel plate steel support system and construction method described in the present invention are suitable for steel-concrete composite structure bridges with double main beams or multiple main beams. In this embodiment, a steel box composite beam with a span of 40m is used in the form of double main beams, and the distance between the two main beams is 7.5m. A closed-type corrugated steel plate composite bridge deck is used between the main beam boxes. The closed-type corrugated steel plates are arranged horizontally, and the bridge deck concrete needs to be poured once after the main beams are erected. In order to solve the problem that the strength and rigidity of the closed-type corrugated steel plates between the boxes are not enough to withstand the wet weight of the concrete poured once, the corrugated steel plate steel support system described in this embodiment is set between the boxes to simplify the construction process and improve the construction quality of the composite bridge deck.

[0062] The main supporting structure of the corrugated steel plate support system described in this embodiment is a tic-tac-toe cross structure formed by multiple horizontally arranged square steels 1 and two longitudinally continuously arranged square steels 2.

[0063] Among them, two longitudinal square steels 2 are arranged at the three-point points of the transverse square steel 1 between the boxes to provide two continuous supports for the closed-end corrugated steel plate.

[0064] Among them, the longitudinal square steel 2 directly bears the construction load transmitted by the concrete bridge deck 9 to the closed corrugated steel plate 6-2. The top edge of the longitudinal square steel 2 is tightly fitted with the bottom edge of the closed corrugated steel plate 6-2, and the lateral spacing between the two longitudinal square steels 2 is 2.5m.

[0065] Among them, the longitudinal square steels 2 on the adjacent two sides are overlapped on the transverse square steel 1 through the saddle-shaped connecting plate 3, and the overlap length is 50 mm. The open side of the saddle-shaped connecting plate 3 is sleeved on the transverse square steel 1 and placed at the three-point position of the transverse square steel 1.

[0066] Among them, the longitudinal square steel 2 is a rectangular steel with a height of 170mm, a width of 80mm, a wall thickness of 6mm and a length of 2260mm; the transverse square steel 1 is 150mm high, 100mm wide, and 10mm thick. The arrangement spacing of the transverse square steel 1 in the transverse bridge direction is 2400mm.

[0067] Among them, the opening width of the saddle-shaped connecting plate 3 is 100mm, the height is 160mm, the extended limb width is 60mm, and the plate thickness is 10mm; the inner diameter of the saddle-shaped connecting plate 3 is consistent with the outer diameter of the transverse square steel 1, so that the saddle-shaped connecting plate 3 can fit tightly on the transverse square steel 1 and be welded to the transverse square steel 1.

[0068] The saddle-shaped connecting plate 3 is a cast steel component and can be uniformly customized in the factory according to the specified size.

[0069] The transverse square steel 1 of the corrugated steel plate support system described in this embodiment is welded to the main beam top plates 5 on both sides by the main beam connecting plates 4. The main beam connecting plates 4 are vertically welded to the bottom of the main beam top plates 5. The transverse square steel 1 is cut with a notch at the end so that the main beam connecting plates 4 are inserted into the transverse square steel 1 and welded to it.

[0070] Among them, the main beam connecting plate 4 is formed by cutting a corner of a rectangular steel plate, with a height of 300mm, a width of 200mm, and a plate thickness of 20mm. The top edge and side edges of the main beam connecting plate 4 are vertically welded to the main beam top plate 5 and the main beam straight web 8-2 of the steel box main beam.

[0071] The longitudinal square steel 2 and the transverse square steel 1 of the corrugated steel plate support system described in this embodiment are of different heights and form a gap at the intersection in the middle of the span. A rubber pad 7 with the same height as the gap is pasted to the gap between two adjacent longitudinal square steels 2.

[0072] Among them, the length of the rubber pad 7 is 190mm, the width is the same as the longitudinal square steel 2, both are 80mm, and the thickness is 20mm. After the rubber pad 7 is installed at the notch, the top edges of the longitudinal square steel 2 are made at the same height to form a continuous supporting structure.

[0073] The construction method of a corrugated steel plate steel support system described in this embodiment is:

[0074] 1. Weld the main beam connecting plate 4 to the bottom surface of the main beam top plate 5 and the side surface of the main beam straight web plate 8-2;

[0075] 2. Hoist the transverse square steel 1, insert the transverse square steel 1 with notches cut at the ends into the main beam connecting plates 4 on both sides of the main beam, and weld them together with the main beam connecting plates 4 after positioning;

[0076] 3. Put the open side of the saddle-shaped connecting plate 3 on the mid-span position of the transverse square steel 1 and weld it to it;

[0077] 4. Repeat the above steps to arrange multiple transverse square steels 1 between the main beams at the specified spacing;

[0078] 5. Overlap the longitudinal square steel 2 on the saddle-shaped connecting plates 3 of two adjacent transverse square steels 1 and weld them together;

[0079] 6. Install rubber pads 7 at the intersection of the longitudinal and transverse square steel supports;

[0080] 7. Lay the box-type closed-end corrugated steel plates 6-2 between the main beam top plates 5, and pour the bridge deck concrete 9 on the closed-end corrugated steel plates 6-2 in one go, thus completing the construction of the corrugated steel plate combined bridge deck.

[0081] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0082] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A corrugated steel plate support system, the support system is installed between the webs of the main beam, and the corrugated steel plate and the bridge deck concrete poured on the corrugated steel plate are supported by the support system, characterized in that: The support system is composed of a plurality of transverse square steels and longitudinal square steels installed mutually, the two ends of the transverse square steels are connected between the main beam top plate and the main beam web plate through a connecting plate, a corrugated steel plate is placed on the main beam top plate and the longitudinal square steels, and the bridge deck concrete is poured on the corrugated steel plate; The transverse square steel and the longitudinal square steel are welded and connected through a saddle-shaped connecting plate, a transverse square steel is welded at the opening of the saddle-shaped connecting plate, and a longitudinal square steel is welded at the two side limbs of the saddle-shaped connecting plate; The saddle-shaped connecting plate is provided with a rubber pad, and after installation, the height of the rubber pad is the same as the height of the longitudinal square steel; The two ends of the transverse square steel are embedded and welded with connecting plates, and the transverse square steel and the main beam top plate and the main beam web are welded and fixed by the connecting plates.

2. A corrugated steel plate support system according to claim 1, characterized in that: The corrugated steel sheet includes an open corrugated steel sheet and a closed corrugated steel sheet.

3. The corrugated steel plate support system according to claim 1, characterized in that: The main beam web includes a main beam corrugated web and a main beam straight web.

4. A construction method of a corrugated steel plate support system according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Vertically weld the connecting plate to the bottom surface of the main beam top plate and the side surface of the main beam web plate; S2. Insert the transverse square steel into the connecting plates on both sides and weld them; S3. Put the open side of the saddle-shaped connecting plate on the mid-span position of the transverse square steel; S4. Repeat the above steps to arrange multiple transverse square steels between the main beam top plates; S5. Weld the longitudinal square steel to the saddle-shaped connecting plates of two adjacent transverse square steels; S6. Install rubber pads; S7. Lay corrugated steel plates between the main beam top plates and pour the bridge deck concrete on the corrugated steel plates in one go.

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