Continuous reinforcement structure of arch bridge deck, reinforcement structure of arch bridge deck and construction method

Abstract

The present application relates to a continuous reinforcement structure for an arch bridge deck, an arch bridge deck reinforcement structure and a construction method, which includes a connection mechanism, a continuous structure for the bridge deck, a steel mesh and a plurality of embedded bars; the connection mechanism is used to be laid on two adjacent simply supported longitudinal beams; the continuous structure for the bridge deck includes a concrete layer cast on the connection mechanism and the simply supported longitudinal beams, and a paving layer cast on the concrete layer; the steel mesh is arranged in the concrete layer and connected to the connection mechanism; one end of a plurality of embedded bars is connected to the steel mesh, and among all the embedded bars, the other end of a part of the embedded bars is used to be embedded in one of the two simply supported longitudinal beams, and the other end of another part of the embedded bars is used to be embedded in the other of the two simply supported longitudinal beams. The present application can solve the problem of the difficulty of construction and high cost in replacing the simply supported longitudinal beams with continuous beams in the related art.

Description

Technical Field

[0001] The present application relates to the technical field of bridge structure construction, and in particular to an arch bridge deck continuous reinforcement structure, an arch bridge deck reinforcement structure and a construction method. Background Art

[0002] Arch bridges have many advantages such as simple structure, strong spanning capacity, convenient material acquisition, and beautiful appearance. They are widely used in modern bridge engineering. Figure 1 As shown, the common structure of the arch bridge deck structure at present is to adopt the form of longitudinal and transverse beams, that is, a number of simply supported longitudinal beams 2 with smaller spans are placed on the arch bridge cross beam 14, and the vehicle load is transmitted to the simply supported longitudinal beams 2 through the bridge deck, and then to the arch bridge cross beam 14, and then to the main arch 16 through the columns or hangers 15 connected to the arch bridge cross beam 14. In order to ensure the smoothness of the bridge deck, this type of arch bridge often adopts the form of continuous bridge deck, that is, while the longitudinal beams are kept simply supported, the bridge deck pavement is connected into one, but due to the large deformation of the continuous bridge deck structure at the connection of adjacent simply supported longitudinal beams 2, the bearing capacity of the continuous bridge deck structure is limited, and the traffic load is increasing day by day, resulting in cracks and damages at the continuous part of the arch bridge deck.

[0003] According to the stress characteristics of the arch bridge, the ideal way to completely solve the above-mentioned defects is to replace the simply supported longitudinal beam 2 with a continuous beam, but it is difficult to directly construct a continuous beam, and there are still gaps between the joints of the continuous beam, and the defects in the gaps cannot be avoided. For an arch bridge that has already suffered from defects, replacing the simply supported longitudinal beam 2 with a continuous beam also faces the problems of high cost and difficult construction. Summary of the invention

[0004] The embodiments of the present application provide an arch bridge deck continuous reinforcement structure, an arch bridge deck reinforcement structure and a construction method to solve the problem of great construction difficulty and high cost in replacing simply supported longitudinal beams with continuous beams in related technologies.

[0005] In a first aspect, a continuous reinforcement structure for an arch bridge deck is provided, comprising:

[0006] A connecting mechanism, which is used for laying on two adjacent simply supported longitudinal beams;

[0007] A continuous bridge deck structure, comprising a concrete layer cast on the connection mechanism and the simply supported longitudinal beam, and a pavement layer cast on the concrete layer;

[0008] A steel mesh, which is arranged in the concrete layer and connected to the connecting mechanism;

[0009] A plurality of embedded bars have one end connected to the steel mesh, and among all the embedded bars, the other end of a portion of the embedded bars is used to be embedded in one of the two simply supported longitudinal beams, and the other end of another portion of the embedded bars is used to be embedded in the other of the two simply supported longitudinal beams.

[0010] In some embodiments, the connecting mechanism includes a plate body and a plurality of connecting members, wherein the connecting members are connected in parallel and at intervals to the plate surface of the plate body away from the simply supported longitudinal beam, the plate body is provided with a first hole for the embedded reinforcement to pass through, and the connecting member is provided with a plurality of second holes distributed along its length direction, the second hole is used for one of the transverse reinforcement and the longitudinal reinforcement of the steel mesh to pass through, and the space clamped between the plate body and two adjacent connecting members is used for the other of the transverse reinforcement and the longitudinal reinforcement of the steel mesh to pass through.

[0011] In some embodiments, the bridge deck continuous structure further includes a connecting layer, which is disposed on a side of the connecting mechanism away from the concrete layer and is used to connect the connecting mechanism and the simply supported longitudinal beam.

[0012] In some embodiments, the bridge deck continuous structure further includes a waterproof layer, and the waterproof layer is located between the concrete layer and the pavement layer.

[0013] In a second aspect, an arch bridge deck reinforcement structure having the above-mentioned arch bridge deck continuous reinforcement structure is provided, comprising:

[0014] Two simply supported longitudinal beams arranged in sequence along the longitudinal direction of the bridge, the connecting mechanism being laid on the two simply supported longitudinal beams; and,

[0015] A portion of the embedded steel bars is implanted into one of the two simply supported longitudinal beams, and another portion of the embedded steel bars is implanted into the other of the two simply supported longitudinal beams.

[0016] In some embodiments, a beam end seam is formed between the two simply supported longitudinal beams, and the beam end seam is filled with a buffer.

[0017] In a third aspect, a construction method of the above-mentioned arch bridge deck reinforcement structure is provided, which comprises the following steps:

[0018] Chiseling away the original continuous bridge deck structure on two adjacent simply supported longitudinal beams to expose the surface of the simply supported longitudinal beams;

[0019] Positioning and drilling holes on the simply supported longitudinal beam and implanting reinforcing bars;

[0020] Laying a connection mechanism and passing the embedded reinforcement through the connection mechanism;

[0021] Laying a steel mesh and connecting the steel mesh to a connecting mechanism and embedded steel bars;

[0022] pouring of concrete layers;

[0023] A paving layer is poured on the concrete layer.

[0024] In some embodiments, after implanting the reinforcing bars and before laying the connecting mechanism, the following steps are also included:

[0025] A connecting layer is laid on the simply supported longitudinal beam.

[0026] In some embodiments, before pouring the paving layer on the concrete layer, the following steps are also included:

[0027] A waterproof layer is poured on the concrete layer.

[0028] In some embodiments, before laying the connection mechanism, the following steps are also included:

[0029] Chiseling away the original concrete between two adjacent simply supported longitudinal beams to obtain a beam end seam;

[0030] A buffer is filled in the end seam of the beam.

[0031] The beneficial effects of the technical solution provided by this application include:

[0032] The embodiments of the present application provide a continuous reinforcement structure for an arch bridge deck, an arch bridge deck reinforcement structure and a construction method. The reinforcement structure provided in the embodiments of the present application, through the cooperation of a connecting mechanism, a steel mesh and embedded steel bars, fixedly connects the continuous structure of the bridge deck with two adjacent simply supported longitudinal beams as a whole. Through local reinforcement, the simply supported longitudinal beams of the entire bridge are connected as a whole to jointly bear the force, so that their longitudinal force form is close to that of the continuous beam, and the connecting mechanism is safe and reliable, which significantly enhances the continuous strength and stiffness of the bridge deck, avoids cracking and damage, improves the mechanical properties and durability of the continuous structure of the bridge deck, and at the same time improves the smoothness of the bridge deck and driving comfort.

[0033] The connection mechanism provided in the embodiment of the present application enhances the tensile strength of the continuous structure of the arch bridge deck, ensuring that the continuous structure of the bridge deck does not suffer from cracking, damage, and other defects during use.

[0034] When the reinforcement structure provided in the present application is applied to an arch bridge, it is only necessary to chisel out the original continuous structure of the bridge deck of the arch bridge and carry out construction on the original simply supported longitudinal beams, thereby avoiding replacing the simply supported longitudinal beams with continuous beams, thereby reducing the construction difficulty and cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 It is a schematic diagram of an arch bridge structure in the related technology;

[0037] Figure 2 A three-dimensional diagram of the arch bridge deck reinforcement structure provided in an embodiment of the present application;

[0038] Figure 3 A cross-sectional view of the arch bridge deck reinforcement structure provided in an embodiment of the present application;

[0039] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0040] Figure 5 A schematic diagram of a connection mechanism provided in an embodiment of the present application.

[0041] In the figure: 1. connecting mechanism; 10. plate body; 11. connecting piece; 12. first hole; 13. second hole; 14. arch bridge crossbeam; 15. hanger; 16. main arch; 2. simply supported longitudinal beam; 3. concrete layer; 4. pavement layer; 5. steel mesh; 6. embedded reinforcement; 7. connecting layer; 8. waterproof layer; 9. buffer. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0043] The embodiment of the present application provides a continuous reinforcement structure for an arch bridge deck, which can solve the problem of great construction difficulty and high cost in replacing simply supported longitudinal beams with continuous beams in the related art.

[0044] See also Figure 2 , Figure 3 and Figure 4 As shown, an embodiment of the present application provides a continuous reinforcement structure for the deck of an arch bridge, which includes a connecting mechanism 1, a continuous structure of the deck, a steel mesh 5 and a plurality of embedded steel bars 6. The connecting mechanism 1 is used to be laid on two adjacent simply supported longitudinal beams 2. During construction, it only needs to cover the ends of the two adjacent simply supported longitudinal beams 2 that are close to each other, and there is no need to fully cover the entire simply supported longitudinal beams 2; the continuous structure of the deck includes a concrete layer 3 cast on the connecting mechanism 1 and the simply supported longitudinal beams 2, and a pavement layer 4 cast on the concrete layer 3; the steel mesh 5 is arranged in the concrete layer 3 and is connected to the connecting mechanism 1; one end of a plurality of embedded steel bars 6 is connected to the steel mesh 5, and among all the embedded steel bars 6, the other end of a part of the embedded steel bars 6 is used to be implanted in one of the two simply supported longitudinal beams 2, and the other end of another part of the embedded steel bars 6 is used to be implanted in the other of the two simply supported longitudinal beams 2.

[0045] The reinforcement structure provided in the embodiment of the present application, through the cooperation of the connecting mechanism 1, the steel mesh 5 and the embedded steel bars 6, fixedly connects the bridge deck continuous structure with the two adjacent simply supported longitudinal beams 2 into a whole, and through local reinforcement, the simply supported longitudinal beams 2 of the entire bridge are connected as a whole to jointly participate in the force, so that the longitudinal force form is close to that of the continuous beam, and the connecting mechanism 1 is safe and reliable, which significantly enhances the strength and rigidity of the bridge deck continuity, avoids cracking and damage, improves the mechanical properties and durability of the bridge deck continuous structure, and at the same time improves the smoothness of the bridge deck and driving comfort.

[0046] The connecting mechanism 1 provided in the embodiment of the present application enhances the tensile strength of the continuous structure of the arch bridge deck, ensuring that the continuous structure of the bridge deck does not suffer from cracking, damage, and other defects during use.

[0047] When the reinforcement structure provided in the present application is applied to an arch bridge, it is only necessary to chisel out the original continuous structure of the bridge deck of the arch bridge and carry out construction on the original simply supported longitudinal beam 2, thereby avoiding replacing the simply supported longitudinal beam with a continuous beam, thereby reducing the construction difficulty and cost.

[0048] In the present application, the concrete layer 3 is the main load-bearing layer. According to the actual load requirements, ordinary concrete materials or ultra-high performance concrete materials can be selected for pouring. If the ordinary concrete material has insufficient performance, under the action of traffic load, ordinary concrete as the material of the continuous structure of the bridge deck will cause cracking, damage and other defects in the continuous structure of the bridge deck. In this case, it is necessary to select ultra-high performance concrete materials for pouring. Since the coarse aggregate is removed from the ultra-high performance concrete layer material and steel fiber is added, the structural cracks of the ultra-high performance concrete under load can be effectively suppressed, and the material strength and durability are greatly improved, thereby avoiding the continuous structure of the bridge deck from being damaged under the action of vehicle load.

[0049] In the present application, the thickness of the concrete layer 3 cast by ultra-high performance concrete material is 60-120 mm. The spacing between the transverse and longitudinal steel bars of the steel mesh 5 is 50-100 mm. The steel mesh 5 is welded to the embedded steel bars 6.

[0050] Ultra-high performance concrete material is used, which has low shrinkage and can effectively reduce shrinkage cracks in the ultra-high performance concrete layer. It has the characteristics of no steaming and curing, is easy to construct, and avoids steaming and curing cracks.

[0051] In the present application, the pavement layer 4 is made of asphalt concrete with a thickness of 40 to 60 mm. The material is consistent with the asphalt concrete pavement material of other parts of the arch bridge, and the visual effect of the bridge deck is coherent and consistent.

[0052] In some preferred embodiments, see Figure 5As shown, the connecting mechanism 1 includes a plate body 10 and a plurality of connecting members 11, the connecting members 11 are connected in parallel and at intervals on the plate surface of the plate body 10 away from the simply supported longitudinal beam 2, the plate body 10 is provided with a first hole 12 for the embedded reinforcement 6 to pass through, the connecting member 11 is provided with a plurality of second holes 13 distributed along its length direction, the second hole 13 is used for one of the transverse reinforcement and the longitudinal reinforcement of the steel mesh 5 to pass through, and the space clamped between the plate body 10 and two adjacent connecting members 11 is used for the other of the transverse reinforcement and the longitudinal reinforcement of the steel mesh 5 to pass through.

[0053] In this embodiment, see Figure 2 As shown, the transverse reinforcement of the reinforcement mesh 5 passes through the second hole 13 of the connector 11 to achieve the connection between the concrete layer 3 and the simply supported longitudinal beam 2. The height of the connector 11 is 5 to 10 mm lower than the thickness of the concrete layer 3. The thickness of the connector 11 is 8 to 12 mm, the spacing of the second holes 13 is consistent with the spacing of the transverse reinforcement of the reinforcement mesh 5, and the diameter of the second hole 13 is larger than the diameter of the reinforcement used in the reinforcement mesh 5.

[0054] The connecting piece 11 connects the plate body 10 and the concrete layer 3 into one. The plate body 10 is made of steel plate, which needs to be sandblasted and rust-removed, with a cleanliness level of Sa2.5 and a surface roughness of 25-50 μm.

[0055] In this embodiment, the connector 11 is a PBL connector.

[0056] In some preferred embodiments, see Figure 3 and Figure 4 As shown, the bridge deck continuous structure further includes a connection layer 7, which is arranged on the side of the connection mechanism 1 away from the concrete layer 3 and is used to connect the connection mechanism 1 and the simply supported longitudinal beam 2. The connection layer 7 can be made of epoxy resin or quick-setting mortar, which plays a leveling role on the one hand and a connecting role on the other.

[0057] In some preferred embodiments, see Figure 3 and Figure 4 As shown, the bridge deck continuous structure further includes a waterproof layer 8 , which is located between the concrete layer 3 and the pavement layer 4 .

[0058] In some preferred embodiments, see Figure 3 and Figure 4 As shown, an embodiment of the present application also provides an arch bridge deck reinforcement structure, which includes two simply supported longitudinal beams 2 arranged in sequence along the longitudinal direction of the bridge and the above arch bridge deck continuous reinforcement structure, wherein the connecting mechanism 1 is laid on the two simply supported longitudinal beams 2; and wherein a portion of the embedded steel bars 6 are implanted into one of the two simply supported longitudinal beams 2, and another portion of the embedded steel bars 6 are implanted into the other of the two simply supported longitudinal beams 2.

[0059] In some preferred embodiments, see Figure 3 and Figure 4 As shown, a beam end seam is formed between the two simply supported longitudinal beams 2, and a buffer 9 is filled in the beam end seam. The buffer 9 has the following functions: first, filling between the two simply supported longitudinal beams 2 can prevent the two simply supported longitudinal beams 2 from colliding due to deformation; second, filling the beam end seam to prevent debris from entering the corroded structure. The buffer 9 can be made of polyvinyl chloride foam board, or polyurethane foam sealant, etc.

[0060] In some preferred embodiments, see Figure 2 , Figure 3 and Figure 4 As shown, the embodiment of the present application also provides a construction method for an arch bridge deck reinforcement structure, which comprises the following steps:

[0061] S1: chiseling away the original continuous bridge deck structure and the upper pavement on two adjacent simply supported longitudinal beams 2 to expose the surface of the simply supported longitudinal beams 2;

[0062] S2: Positioning and drilling holes on the simply supported longitudinal beam 2, injecting glue and implanting the rebar 6;

[0063] S3: The connection mechanism 1 is subjected to sandblasting and rust removal treatment, and the cleanliness after sandblasting is required to reach Sa2.5 level and the surface roughness is required to reach 25-50 μm, the connection mechanism 1 is laid, and the embedded steel bar 6 passes through the connection mechanism 1;

[0064] S4: Laying the steel mesh 5 and connecting the steel mesh 5 with the connecting mechanism 1 and the embedded steel bars 6;

[0065] S5: pouring concrete layer 3. During the construction process, the concrete layer 3 is vibrated and leveled in time to ensure that the concrete layer 3 is dense and has no holes, and the surface is smoothed in time; after the construction is completed, the surface of the concrete layer 3 is covered with a curing film and cured at room temperature for 7 days. During the curing period, a proper amount of water is sprayed on the surface of the curing film; after the curing is completed, the curing facilities are removed, and the surface of the concrete layer 3 is shot blasted to a depth of 0.5 to 0.8 mm;

[0066] S6: pouring the paving layer 4 on the concrete layer 3 and compacting it.

[0067] In some preferred embodiments, see Figure 4 As shown, after implanting the reinforcing bars 6 and before laying the connecting mechanism 1 , the following steps are also included: laying the connecting layer 7 on the simply supported longitudinal beam 2 .

[0068] In some preferred embodiments, see Figure 4 As shown, before pouring the paving layer 4 on the concrete layer 3 , the following steps are also included: pouring a waterproof layer 8 on the concrete layer 3 .

[0069] In some preferred embodiments, see Figure 4As shown, before laying the connection mechanism 1, the following steps are also included: chiseling away the original concrete between two adjacent simply supported longitudinal beams 2 to obtain a beam end seam; and filling the beam end seam with a buffer 9.

[0070] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0071] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0072] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A construction method for an arch bridge deck reinforcement structure, characterized in that: The arch bridge deck reinforcement structure comprises an arch bridge deck continuous reinforcement structure and two simply supported longitudinal beams (2) arranged in sequence along the longitudinal direction of the bridge. The arch bridge deck continuous reinforcement structure comprises: A connecting mechanism (1) is laid on two adjacent simply supported longitudinal beams (2); A continuous bridge deck structure, comprising a concrete layer (3) cast on the connection mechanism (1) and the simply supported longitudinal beam (2), and a pavement layer (4) cast on the concrete layer (3); A steel mesh (5) disposed in the concrete layer (3) and connected to the connecting mechanism (1); A plurality of embedded bars (6), one end of which is connected to the steel mesh (5), and among all the embedded bars (6), the other end of a portion of the embedded bars (6) is embedded in one of the two simply supported longitudinal beams (2), and the other end of another portion of the embedded bars (6) is embedded in the other of the two simply supported longitudinal beams (2); The connecting mechanism (1) comprises a plate body (10) and a plurality of connecting members (11), wherein the connecting members (11) are connected in parallel and at intervals to the plate surface of the plate body (10) away from the simply supported longitudinal beam (2), the plate body (10) is provided with a first hole (12) for the embedded reinforcement (6) to pass through, the connecting member (11) is provided with a plurality of second holes (13) distributed along its length direction, the second hole (13) is used for one of the transverse reinforcement and the longitudinal reinforcement of the reinforcement mesh (5) to pass through, and the space clamped between the plate body (10) and two adjacent connecting members (11) is used for the other of the transverse reinforcement and the longitudinal reinforcement of the reinforcement mesh (5) to pass through. The construction method comprises the following steps: Chiseling away the original continuous bridge deck structure on two adjacent simply supported longitudinal beams (2) to expose the surface of the simply supported longitudinal beams (2); Positioning and drilling holes on the simply supported longitudinal beam (2) and implanting reinforcing bars (6); Laying a connection mechanism (1) and passing the embedded reinforcement (6) through the connection mechanism (1); Laying a steel mesh (5), and connecting the steel mesh (5) to a connecting mechanism (1) and embedded steel bars (6); pouring a concrete layer (3); A paving layer (4) is poured on the concrete layer (3).

2. The construction method according to claim 1, characterized in that: The bridge deck continuous structure also includes a connection layer (7), which is arranged on a side of the connection mechanism (1) away from the concrete layer (3) and is used to connect the connection mechanism (1) and the simply supported longitudinal beam (2).

3. The construction method according to claim 1, characterized in that: The bridge deck continuous structure also includes a waterproof layer (8), and the waterproof layer (8) is located between the concrete layer (3) and the pavement layer (4).

4. The construction method according to claim 1, characterized in that: A beam end seam is formed between the two simply supported longitudinal beams (2), and a buffer (9) is filled in the beam end seam.

5. The construction method according to claim 1, characterized in that: After implanting the reinforcing bar (6) and before laying the connecting mechanism (1), the following steps are also included: A connecting layer (7) is laid on the simply supported longitudinal beam (2).

6. The construction method according to claim 1, characterized in that: Before pouring the paving layer (4) on the concrete layer (3), the following steps are also included: A waterproof layer (8) is poured on the concrete layer (3).

7. The construction method according to claim 1, characterized in that: Before laying the connection mechanism (1), the following steps are also included: Chiseling away the original concrete between two adjacent simply supported longitudinal beams (2) to obtain a beam end seam; A buffer (9) is filled in the beam end seam.

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