Steel-concrete composite slab structure and construction method of small and medium span bridge

Abstract

The application provides a steel-concrete combined plate structure and construction method of a small and medium span bridge, relates to the technical field of small and medium span bridge erection, and comprises a concrete outer layer, a steel-concrete assembly arranged in the concrete outer layer, an upper top plate, a vertical plate, a lower top plate and a side plate arranged in the concrete outer layer, left and right sides of the lower top plate are respectively provided with a left connecting chain and a right connecting chain, the outer side of the side plate is provided with a second buffer strip, a buffer assembly is arranged at the middle position of the upper top plate, the buffer assembly comprises a buffer gap vertically penetrating through the upper top plate and the vertical plate, and a first buffer strip is arranged in the buffer gap, the problems of the bulky and poor strength of the original steel-concrete combined plate structure of the small and medium span bridge are solved, the steel-concrete assembly with a hollow structure is more light, the strength can meet the requirements, has the stress buffer deformation effect, reduces the damage to the surface of the combined plate, and the buffer has the hydrophobic function, which is multi-purpose.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of small and medium span bridge construction, in particular to a steel-concrete composite slab structure of small and medium span bridge and a construction method. BACKGROUND

[0002] There are many problems in the construction of highway bridges. The completed highway bridges often have problems within the effective period, the bridge structure is damaged or even collapses, which also shows that there are many deficiencies in the specification standards, engineering design and other aspects of highway bridges. Among the damaged bridges, the proportion of small and medium span bridges with a span of less than 40 meters accounts for more than 90% of the total number of bridges.

[0003] In recent years, due to the rapid decrease in the performance of a large number of bridges in service or even damage, the problem of bridge structure durability has been recognized and valued again. However, overall, the actual action to ensure structural durability is still very slow. In the past bridge design, a considerable part of the design did not consider structural durability. Even if it is considered, it is only a concept, such as life cycle cost, which is not fully considered in specific design. Although the current specification has some specific provisions for ensuring structural durability, it is generally rough and general. Since most of the durability determinants require the bridge to have sufficient strength, in the past, the bridge structure is generally increased by adding sufficient steel bars and sufficient concrete, which naturally leads to an increase in the weight and cost of the bridge, which is not conducive to large-scale construction requirements.

[0004] In the prior art, some researches on the construction technology of small and medium span bridges have appeared. For example, Chinese patent CN108130852A discloses a steel-concrete composite slab structure of small and medium span bridge. In this patent, the I-beam and the reinforced concrete slab are combined together to compress the height of the overall structure, so as to play the material mechanics characteristics of steel tensile and concrete compression. However, this structure cannot meet the lightweight requirement. In order to increase the strength, more concrete is used, and the pressure on the I-beam is large. Since the structure lacks a connecting structure, the strength of the connecting part is insufficient during later paving. Therefore, there is an urgent need for a steel-concrete composite slab structure of small and medium span bridge and a construction method to solve the above problems. SUMMARY

[0005] In view of the deficiencies in the prior art, the present application aims to provide a steel-concrete composite slab structure of small and medium span bridge to solve the problems in the background art. The hollow structure of the steel-concrete component is more lightweight, the strength is satisfied, and has stress buffering deformation effect, reduces the damage to the surface of the composite slab, and has the functions of buffering and hydrophobicity.

[0006] In order to achieve the above object, the present application is realized by the following technical scheme: a steel-concrete combined plate structure of a small and medium span bridge, comprising a concrete outer layer, a steel-concrete assembly is arranged inside the concrete outer layer, the steel-concrete assembly comprises an upper top plate, a vertical plate, a lower top plate and a side plate arranged inside the concrete outer layer, the upper top plate is embedded in the bottom of the concrete outer layer, the lower top plate is embedded in the top of the concrete outer layer, the vertical plate is arranged between the upper top plate and the lower top plate, the side plate is arranged on both sides of the upper top plate and the lower top plate, left and right sides of the lower top plate are respectively provided with left and right connecting chains, the outer side of the side plate is provided with a second buffer strip, a buffer assembly is arranged at the middle position of the upper top plate, the buffer assembly comprises a buffer slot vertically penetrating through the upper top plate and the vertical plate, and the buffer slot is provided with a first buffer strip.

[0007] Further, the upper top plate, the lower top plate and the side plate jointly form a rectangular frame structure, the vertical plate is perpendicular to the upper top plate, the lower top plate and the side plate, and the vertical plate is integrally connected with the upper top plate, the lower top plate and the side plate.

[0008] Further, the first buffer strip is provided with an inner recessed water storage groove at the top.

[0009] Further, the water storage groove is provided with a drainage hole penetrating through both ends.

[0010] Further, the left connecting chain and the right connecting chain are integrally connected with the lower top plate.

[0011] Further, the left connecting chain is provided with a bayonet I with an upward opening, the right connecting chain is provided with a bayonet II with a downward opening, and the bayonet I and the bayonet II are matched.

[0012] Further, the material of the concrete outer layer is C30-C50 steel fiber reinforced concrete.

[0013] Further, the thickness of the lower top plate is greater than that of the upper top plate, and the materials of the upper top plate, the vertical plate, the lower top plate and the side plate are Q345qE bridge steel plates.

[0014] Further, the bottom of the lower top plate is provided with a raised cushion block, and the cushion block is located at both ends of the lower top plate.

[0015] Another object of the present application is to provide a construction method of a steel-concrete combined plate structure of a small and medium span bridge, comprising the following steps:

[0016] S1, a plurality of steel-concrete combined plate structures of a small and medium span bridge are taken, each steel-concrete combined plate structure of a small and medium span bridge is aligned head to tail along the left and right connecting chains, and is connected by the left and right connecting chains;

[0017] S2, filling cement at the left connecting chain and the right connecting chain snap connection, the edge of the cement is flush with the edge of the side plate.

[0018] Advantages of the present application:

[0019] 1、 the upper top plate, the lower top plate and the side plate of the present application jointly form a rectangular frame structure, so that the steel-concrete composite board is hollow inside, the whole steel-concrete composite board structure is more lightweight, and the vertical plate is perpendicular to the upper top plate, the lower top plate and the side plate, thereby supporting the upper top plate and the lower top plate, so that the strength of the steel-concrete composite board structure is ensured;

[0020] 2、 when the upper top plate is subjected to downward extrusion stress, the middle position of the upper top plate will bend downward, at this time, the first buffer strip in the buffer joint is stressed and deformed, thereby buffering the extrusion stress of the upper top plate; meanwhile, the first buffer strip is provided with an inner recessed water storage tank at the top, and the two ends of the water storage tank are provided with drainage holes, so that the water on the upper top plate will flow into the water storage tank and finally be discharged along the drainage holes on both sides of the water storage tank;

[0021] 3、 the outer side of the side plate is provided with a second buffer strip, after the left connecting chain and the right connecting chain are connected, the joints will be filled with cement, at this time, the second buffer strip plays a buffering role on the two steel-concrete composite board structures, which is beneficial to the slight stress deformation of the adjacent steel-concrete composite board structures;

[0022] 4、 the steel-concrete assembly with a hollow structure is more lightweight, the strength is sufficient, and has the stress buffering deformation effect, which reduces the damage to the surface of the composite board, and the buffering and drainage functions are combined, achieving multiple purposes at once. BRIEF DESCRIPTION OF DRAWINGS

[0023] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the following drawings:

[0024] Figure 1 It is a structural schematic diagram of a steel-concrete composite board structure of a medium and small span bridge of the present application;

[0025] Figure 2 It is a front view sectional view of a steel-concrete composite board structure of a medium and small span bridge of the present application;

[0026] Figure 3 It is a right view sectional view of a steel-concrete composite board structure of a medium and small span bridge of the present application;

[0027] Figure 4 It is a use principle diagram of a steel-concrete composite board structure of a medium and small span bridge of the present application;

[0028] In the figure: 1 concrete outer layer, 2 buffer assembly, 21 hydrophobic hole, 22 first buffer strip, 23 buffer gap, 24 water storage tank, 3 second buffer strip, 4 right connecting chain, 41 second female thread, 5 left connecting chain, 6 first female thread, 7 cushion block, 8 steel-concrete assembly, 81 upper top plate, 82 vertical plate, 83 lower top plate, 84 side plate, 9 cement. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in conjunction with specific embodiments.

[0030] The present application provides a technical solution: a steel-concrete composite plate structure of a small and medium span bridge, comprising a concrete outer layer 1, a steel-concrete assembly 8 arranged inside the concrete outer layer 1, the steel-concrete assembly 8 comprising an upper top plate 81, a vertical plate 82, a lower top plate 83 and a side plate 84 arranged inside the concrete outer layer 1, the upper top plate 81 being embedded at the bottom of the concrete outer layer 1, the lower top plate 83 being embedded at the top of the concrete outer layer 1, the vertical plate 82 being arranged between the upper top plate 81 and the lower top plate 83, the side plate 84 being arranged on both sides of the upper top plate 81 and the lower top plate 83, the left and right sides of the lower top plate 83 being respectively provided with a left connecting chain 5 and a right connecting chain 4, the outer side of the side plate 84 being provided with a second buffer strip 3, and the middle position of the upper top plate 81 being provided with a buffer assembly 2, the buffer assembly 2 comprising a buffer gap 23 vertically penetrating through the upper top plate 81 and the vertical plate 82, and the buffer gap 23 being provided with a first buffer strip 22, thereby solving the problems of bulkiness and poor strength of the original steel-concrete composite plate structure of a small and medium span bridge.

[0031] The upper top plate 81, the lower top plate 83 and the side plate 84 of the present application jointly form a rectangular frame structure, so that the steel-concrete composite plate is hollow inside, the vertical plate 82 is perpendicular to the upper top plate 81, the lower top plate 83 and the side plate 84, the vertical plate 82 is integrally connected with the upper top plate 81, the lower top plate 83 and the side plate 84, and the vertical plate 82 plays a role in supporting the upper top plate 81 and the lower top plate 83.

[0032] The first buffer strip 22 of the present application is provided with an inner recessed water storage tank 24 at the top, and the water storage tank 24 is provided with hydrophobic holes 21 at both ends, so that the water on the upper top plate 81 will flow into the water storage tank 24 and finally be discharged along the hydrophobic holes 21 on both sides of the water storage tank 24.

[0033] The left connecting chain 5 and the right connecting chain 4 of the present application are integrally connected with the lower top plate 83, thereby enhancing the connecting strength of the lower top plate 83, the left connecting chain 5 is provided with a first female thread 6 with an upward opening, the right connecting chain 4 is provided with a second female thread 41 with a downward opening, the first female thread 6 is matched with the second female thread 41, and the steel-concrete composite plate structure is convenient for end-to-end splicing in the later stage.

[0034] The concrete outer layer 1 of the present application is made of C30 concrete to C50 concrete steel fiber concrete, which has good toughness and is not easy to crack.

[0035] The thickness of the lower top plate 83 is greater than that of the upper top plate 81, so that the lower top plate 83 can better bear the weight of the entire steel-concrete composite plate structure.

[0036] The bottom of the lower top plate 83 is provided with a raised cushion block 7, which is located at both ends of the lower top plate 83.

[0037] Another object of the present application is to provide a construction method of a steel-concrete composite plate structure of a small and medium span bridge, comprising the following steps:

[0038] S1, a plurality of steel-concrete composite plate structures of small and medium span bridges are taken, each steel-concrete composite plate structure of small and medium span bridge is aligned head to tail along the left connecting chain 5 and the right connecting chain 4, and is connected by the left connecting chain 5 and the right connecting chain 4.

[0039] S2, the cement 9 is filled at the buckle connection of the left connecting chain 5 and the right connecting chain 4, and the edge of the cement 9 is flush with the edge of the side plate 84.

[0040] Further description is made below in conjunction with the drawings of the specification:

[0041] Referring to Figures 1-3 A steel-concrete composite plate structure of a small and medium span bridge, comprising a concrete outer layer 1, the concrete outer layer 1 is internally provided with a steel-concrete assembly 8, the concrete outer layer 1 plays a role of protecting the internal steel-concrete assembly 8 and preventing it from rusting and corroding.

[0042] Referring to Figures 2-3 The steel-concrete assembly 8 comprises an upper top plate 81, a vertical plate 82, a lower top plate 83 and a side plate 84 arranged inside the concrete outer layer 1, the upper top plate 81 is embedded at the bottom of the concrete outer layer 1, the lower top plate 83 is embedded at the top of the concrete outer layer 1, the vertical plate 82 is arranged between the upper top plate 81 and the lower top plate 83, the side plate 84 is arranged on both sides of the upper top plate 81 and the lower top plate 83, the side plate 84 is used for supporting both sides of the steel-concrete composite plate structure, the upper top plate 81, the lower top plate 83 and the side plate 84 jointly form a rectangular frame structure, so that the steel-concrete composite plate is hollow, which makes the entire steel-concrete composite plate structure more lightweight, and the vertical plate 82 is perpendicular to the upper top plate 81, the lower top plate 83 and the side plate 84, the vertical plate 82 is integrally connected with the upper top plate 81, the lower top plate 83 and the side plate 84, and the vertical plate 82 plays a role of supporting the upper top plate 81 and the lower top plate 83, so that the strength of the steel-concrete composite plate structure is guaranteed.

[0043] Referring toFigures 1-2 The left connecting chain 5 and the right connecting chain 4 are integrally connected with the lower top plate 83, so that the connecting strength of the lower top plate 83 is enhanced; the left connecting chain 5 is provided with a bayonet 6 with an upward opening, and the right connecting chain 4 is provided with a bayonet 41 with a downward opening, the bayonet 6 and the bayonet 41 are matched, so that the steel-concrete composite slab structure is conveniently spliced at the head and tail in the later period.

[0044] Referring to Figures 1-4 The middle position of the upper top plate 81 is provided with a buffer assembly 2, the buffer assembly 2 includes a buffer slot 23 vertically penetrating the upper top plate 81 and the vertical plate 82, and a first buffer strip 22 is arranged in the buffer slot 23; when the upper top plate 81 is subjected to downward extrusion stress, the middle position of the upper top plate 81 will be bent downward at this time, and the first buffer strip 22 in the buffer slot 23 is deformed under stress, thereby buffering the extrusion stress of the upper top plate 81; the outer side of the side plate 84 is provided with a second buffer strip 3, such as Figure 4 When the left connecting chain 5 and the right connecting chain 4 are connected, the cement 9 is used for caulking, and at this time the second buffer strip 3 plays a buffering role on the two sides of the steel-concrete composite slab structure, which is beneficial to the slight stress deformation of the adjacent steel-concrete composite slab structure.

[0045] Referring to Figures 1-3 The top of the first buffer strip 22 is provided with a concave water storage groove 24, and the both ends of the water storage groove 24 are provided with drainage holes 21, so that the water accumulated on the upper top plate 81 in the later period flows into the water storage groove 24 and is finally discharged along the drainage holes 21 on both sides of the water storage groove 24.

[0046] Referring to Figures 1-3 The concrete outer layer 1 is made of C30-C50 steel fiber reinforced concrete, which has good toughness and is not easy to crack; the thickness of the lower top plate 83 is greater than that of the upper top plate 81; the materials of the upper top plate 81, the vertical plate 82, the lower top plate 83 and the side plate 84 are Q345qE bridge steel plates, which are the first choice for bridge steel materials and have good supporting strength.

[0047] Referring to Figure 1 The bottom of the lower top plate 83 is provided with a raised cushion block 7, and the cushion block 7 is located at both ends of the lower top plate 83; the cushion block 7 is used for the steel-concrete composite slab structure to lie on the pier in the later period.

[0048] As one of the embodiments of the present application: first, take a plurality of small and medium span steel-concrete composite plate structures, each small and medium span steel-concrete composite plate structure is aligned head-to-tail along the left connecting chain 5 and the right connecting chain 4, and is connected by the left connecting chain 5 and the right connecting chain 4 buckle, and the plurality of steel-concrete composite plate structures are placed on the pier along the bottom cushion 7; then fill the cement 9 at the buckle connection of the left connecting chain 5 and the right connecting chain 4, and the cement 9 is filled to be flush with the edge of the side plate 84;

[0049] The present application forms a rectangular frame structure by the upper top plate 81, the lower top plate 83 and the side plate 84, so that the steel-concrete composite plate is hollow, the whole steel-concrete composite plate structure is more lightweight, and the vertical plate 82 is perpendicular to the upper top plate 81, the lower top plate 83 and the side plate 84, which supports the upper top plate 81 and the lower top plate 83, so that the strength of the steel-concrete composite plate structure is guaranteed;

[0050] When the upper top plate 81 is subjected to downward extrusion stress, the middle position of the upper top plate 81 will bend downward, at this time the first buffer strip 22 in the buffer joint 23 is stressed and deformed, thereby buffering the extrusion stress of the upper top plate 81; at the same time, the first buffer strip 22 is provided with a concave water storage groove 24 at the top, and the water storage groove 24 is provided with a drainage hole 21 at both ends, so that the water on the upper top plate 81 flows into the water storage groove 24 and is finally discharged along the drainage hole 21 on both sides of the water storage groove 24;

[0051] The outer side of the side plate 84 is provided with a second buffer strip 3, like Figure 4 After the left connecting chain 5 and the right connecting chain 4 are connected, the cement 9 is used for filling the joint, at this time the second buffer strip 3 buffers the steel-concrete composite plate structures on both sides, which is beneficial to the slight stress deformation of the adjacent steel-concrete composite plate structures.

[0052] The above shows and describes the basic principles and main features of the present application and the advantages of the present application, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0053] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes every feature described. The specification can include implicit combinations of explicitly mentioned features and / or explicit combinations of implicitely mentioned features. Each embodiment depends on the explicit combinations of features and / or the implicit combinations of features made specifically within that embodiment, and each such embodiment can be combined with every other such embodiment to create further embodiments.

Claims

1. A steel-concrete composite slab structure for a small-to-medium span bridge, characterized by: The application relates to a concrete outer layer (1) internally provided with a steel-concrete assembly (8), wherein the steel-concrete assembly (8) comprises an upper top plate (81), a vertical plate (82), a lower top plate (83) and a side plate (84) arranged inside the concrete outer layer (1), the upper top plate (81) is embedded at the bottom of the concrete outer layer (1), the lower top plate (83) is embedded at the top of the concrete outer layer (1), the vertical plate (82) is arranged between the upper top plate (81) and the lower top plate (83), the side plate (84) is arranged on the two sides of the upper top plate (81) and the lower top plate (83), left connecting chains (5) and right connecting chains (4) are respectively arranged on the left and right sides of the lower top plate (83), second buffer strips (3) are arranged on the outer sides of the side plates (84), buffer assemblies (2) are arranged at the middle positions of the upper top plates (81), the buffer assemblies (2) comprise buffer slots (23) vertically penetrating the upper top plates (81) and the vertical plates (82), and first buffer strips (22) are arranged in the buffer slots (23).

2. The steel-concrete composite slab structure of a small-to-medium span bridge according to claim 1, characterized in that: The upper top plate (81), the lower top plate (83) and the side plate (84) jointly form a rectangular frame structure, the vertical plate (82) is perpendicular to the upper top plate (81), the lower top plate (83) and the side plate (84), and the vertical plate (82) is integrally connected with the upper top plate (81), the lower top plate (83) and the side plate (84).

3. The steel-concrete composite slab structure of a small-to-medium span bridge according to claim 1, characterized in that: The first buffer strip (22) is provided with an inner recessed water storage groove (24) at the top.

4. The steel-concrete composite slab structure of a small and medium span bridge according to claim 3, characterized in that: The water storage groove (24) is provided with water discharge holes (21) penetratingly arranged at two ends.

5. The steel-concrete composite slab structure of a small or medium span bridge according to claim 1, characterized in that: The left connecting chain (5) and the right connecting chain (4) are integrally connected with the lower top plate (83).

6. The steel-concrete composite slab structure of a small or medium span bridge according to claim 1, characterized in that: The left connecting chain (5) is provided with a first bayonet (6) with an upward opening, the right connecting chain (4) is provided with a second bayonet (41) with a downward opening, and the first bayonet (6) is matched with the second bayonet (41).

7. The steel-concrete composite slab structure of a small-to-medium span bridge according to claim 1, characterized in that: The material of the concrete outer layer (1) is C30-C50 steel fiber reinforced concrete.

8. The steel-concrete composite slab structure of a small or medium span bridge according to claim 1, characterized in that: The thickness of the lower top plate (83) is greater than that of the upper top plate (81), and the materials of the upper top plate (81), the vertical plate (82), the lower top plate (83) and the side plate (84) are Q345qE bridge steel plates.

9. The steel-concrete composite slab structure of a small-to-medium span bridge according to claim 1, characterized in that: The bottom of the lower top plate (83) is provided with a raised cushion block (7), and the cushion block (7) is located at the two ends of the lower top plate (83).

10. The construction method of a small and medium span bridge steel-concrete composite slab structure according to claim 1, characterized in that, The application further discloses a method for manufacturing the steel-concrete assembly (8), which comprises the following steps: S1, a plurality of steel-concrete assembly plates of small and medium span bridges are taken, the steel-concrete assembly plates of small and medium span bridges are aligned in a head-to-tail mode along the left connecting chain (5) and the right connecting chain (4), and the left connecting chain (5) and the right connecting chain (4) are buckled and connected; S2, cement (9) is filled at the buckled and connected positions of the left connecting chain (5) and the right connecting chain (4), and the edges of the cement (9) are flush with the edges of the side plates (84).

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