Groove-shaped composite beam cast-in-place bridge deck slab construction formwork support

Abstract

The utility model discloses a groove-shaped composite beam cast-in-place bridge deck slab construction formwork support which comprises a steel beam box chamber, support mechanisms and formwork mechanisms, the two support mechanisms are arranged on the two sides of a steel beam web of the steel beam box chamber, each formwork mechanism comprises a box chamber inner bottom die, a transverse stiffening mechanism, a cantilever bottom die and a cantilever side die, the box chamber inner bottom die is arranged at the upper end of the steel beam box chamber, and the transverse stiffening mechanism is arranged on the lower end of the box chamber. The transverse stiffening mechanism is installed at the lower end of the bottom die in the box chamber, two cantilever bottom dies are arranged on the outer edge of the bottom edge of the concrete bridge deck slab cantilever, a cantilever side die is arranged at the end, away from the bottom die in the box chamber, of each cantilever bottom die, and the cantilever bottom dies are installed on the support mechanism. After the support mechanism and the formwork mechanism are installed in the steel beam box chamber, the support mechanism and the formwork mechanism can be hoisted together with the steel beam box chamber, the construction procedure of erecting a ground support is reduced, the ground support is not involved in the whole bridge deck slab construction process, the whole bridge deck slab construction process is completed on the upper structure of a bridge, construction is fast, and the space below the bridge is not occupied; the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering construction, in particular to a template support for construction of a trough-shaped composite beam cast-in-place bridge deck. Background Art

[0002] Steel-concrete composite beam refers to a composite structure that uses shear connectors to combine structural components such as steel plate beams, steel box beams, steel trusses and reinforced concrete into a composite cross-section to work together. In recent years, steel-concrete composite beams have been increasingly widely used in urban overpasses and building structures in my country. The cross-sectional form has also been expanded from the earlier single steel plate beam to steel box beams and steel trough beams. Among them, the steel trough composite beam has the characteristics of beautiful structural appearance and small amount of steel, and is widely used in urban bridge design. The bridge deck of the steel-concrete composite beam is a reinforced concrete structure. During the pouring process of the bridge deck, before the strength is formed, scaffolding needs to be erected on the construction site to support the bridge deck formwork. The construction process is complicated and requires high-altitude operations, which has poor safety, a great impact on the traffic under the bridge, and high construction costs. Therefore, a trough composite beam cast-in-place bridge deck construction formwork support is proposed. Utility Model Content

[0003] The utility model aims to provide a formwork support for construction of a trough-shaped composite beam cast-in-place bridge deck, which is used to solve the above-mentioned technical problems.

[0004] The technical solution adopted by the utility model is as follows:

[0005] A formwork support for the construction of a trough-shaped composite beam cast-in-place bridge deck comprises a steel beam box chamber, a support mechanism and a formwork mechanism. Two support mechanisms are provided on both sides of the steel beam web of the steel beam box chamber. The formwork mechanism comprises a box chamber inner bottom formwork, a transverse stiffening mechanism, a cantilever arm bottom formwork and a cantilever arm side formwork. The box chamber inner bottom formwork is arranged at the upper end of the steel beam box chamber, the transverse stiffening mechanism is installed at the lower end of the box chamber inner bottom formwork, two cantilever arm bottom formworks are provided at the outer edge of the bottom side of the cantilever arm of the concrete bridge deck, and one cantilever arm side formwork is provided at each cantilever arm bottom formwork's end away from the box chamber inner bottom formwork, and the cantilever arm bottom formwork is installed on the support mechanism.

[0006] Preferably, the outer dimensions of the cantilever bottom formwork and the outer dimensions of the cantilever side formwork match the outer dimensions of the concrete bridge deck cantilever.

[0007] Preferably, the outer dimensions of the bottom formwork inside the box chamber match the linear dimensions of the concrete deck of the bridge inside the box chamber.

[0008] Preferably, it also includes a steel beam top plate, and the steel beam top plate is arranged between the box chamber bottom formwork and the cantilever arm bottom formwork.

[0009] Preferably, it also includes steel-concrete connecting parts, and a plurality of the steel-concrete connecting parts are respectively provided on the inner bottom formwork of the box chamber, the bottom formwork of the cantilever arm and the side formwork of the cantilever arm.

[0010] As a further preference, the steel beam box chamber includes a steel beam cross-diaphragm and a steel beam top plate, two steel beam cross-diaphragms are arranged between the two steel beam webs, and a steel beam top plate is respectively arranged at the upper end of each steel beam web and the two steel beam cross-diaphragms.

[0011] As a further preference, the support mechanism includes a first diagonal brace, a second diagonal brace and a longitudinal support rod, one end of several of the first diagonal brace rods and several of the second diagonal brace rods are respectively connected to the web of the steel beam, the other end of each of the first diagonal brace rods is respectively connected to the lower side of the other end of a second diagonal brace rod, several of the longitudinal support rods are arranged at the upper ends of several of the second diagonal brace rods, and the cantilever arm bottom mold is arranged at the upper ends of several of the longitudinal support rods.

[0012] As a further preference, it also includes a first support pad, a second support pad and a third support pad, wherein the first support pad is respectively arranged between one end of the first diagonal brace rod and the web of the steel beam and between one end of the second diagonal brace rod and the web of the steel beam, the second support pad is arranged between the other end of the first diagonal brace rod and the second diagonal brace rod, and the third support pad is arranged between the second diagonal brace rod and the longitudinal support rod.

[0013] As a further preference, the first diagonal brace and the second diagonal brace are both directly opposite to the steel beam cross diaphragm.

[0014] The above technical solution has the following advantages or beneficial effects:

[0015] In the utility model, after the support mechanism and the formwork mechanism are installed in the steel beam box chamber, they can be hoisted together with the steel beam box chamber, reducing the construction process of erecting ground supports. No ground supports are involved in the entire bridge deck construction process, and all are completed on the bridge superstructure. The construction is fast and does not occupy the space under the bridge. The support mechanism can be disassembled and reused repeatedly, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the formwork support for the construction of a cast-in-place bridge deck of a medium-trough composite beam of the utility model;

[0017] Figure 2 It is a top view of the support mechanism and the steel beam box chamber in the utility model;

[0018] Figure 3 for Figure 1 The enlarged view of point A in the middle;

[0019] Figure 4for Figure 1 The enlarged view of point B in the middle;

[0020] Figure 5 This is the front view of multiple steel beam box chambers combined.

[0021] In the figure: 1. Steel beam box chamber; 11. Steel beam top plate; 12. Steel beam web plate; 13. Steel beam cross diaphragm; 2. Support mechanism; 21. First diagonal brace; 22. Second diagonal brace; 23. Longitudinal support rod; 24. First support pad; 25. Second support pad; 26. Third support pad; 3. Formwork mechanism; 31. Box chamber bottom formwork; 32. Horizontal stiffening mechanism; 33. Cantilever arm bottom formwork; 34. Cantilever arm side formwork; 35. Steel-concrete connector. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Figure 1 This is a front view of the formwork support for the construction of a cast-in-place bridge deck of a medium-trough composite beam of the utility model; Figure 2 It is a top view of the support mechanism and the steel beam box chamber in the utility model; Figure 3 for Figure 1 The enlarged view of point A in the middle; Figure 4 for Figure 1 The enlarged view of point B in the middle; Figure 5 For the front view of multiple steel beam box chambers, see Figures 1 to 5 As shown, a preferred embodiment is shown, which shows a formwork support for the construction of a cast-in-situ bridge deck of a trough-shaped composite beam, including a steel beam box chamber 1, a support mechanism 2 and a formwork mechanism 3. Two support mechanisms 2 are provided on both sides of the steel beam box chamber 1. The formwork mechanism 3 includes a box chamber bottom form 31, a transverse stiffening mechanism 32, a cantilever arm bottom form 33 and a cantilever arm side form 34. The box chamber bottom form 31 is provided at the upper end of the steel beam box chamber 1, and the transverse stiffening mechanism 32 is installed at the lower end of the box chamber bottom form 31. Two cantilever arm bottom forms 33 are provided on both sides of the box chamber bottom form 31. Each cantilever arm bottom form 33 is provided with a cantilever arm side form 34 at one end away from the box chamber bottom form 31, and the cantilever arm bottom form 33 is installed on the support mechanism 2. In this embodiment, a steel beam top plate 11 is also included, and a steel beam top plate 11 is provided between the box chamber bottom form 31 and the cantilever arm bottom form 33. Among them, the bottom formwork 31 in the box chamber is the concrete formwork for the bridge deck in the box chamber, which is arranged on the inner side of the upper end of the steel beam box chamber 1, and the outer dimensions of the bottom formwork 31 in the box chamber match the linear dimensions of the concrete of the bridge deck in the box chamber. The transverse stiffening mechanism 32 can be a transverse stiffening rib, which is provided with a plurality of transverse stiffening ribs, evenly distributed at the lower end of the bottom formwork 31 in the box chamber, and welded to the lower end of the bottom formwork 31 in the box chamber, so as to increase the overall rigidity of the bottom formwork 31 in the box chamber and prevent the bottom formwork 31 in the box chamber from buckling and deformation. Among them, the two ends of the bottom formwork 31 in the box chamber are placed on the steel beam top plate 11, and are connected to the steel beam top plate 11 through fillet welds. A certain gap should be reserved between the transverse stiffening mechanism 32 and the steel beam top plate 11 for easy installation.

[0026] In this embodiment, the cantilever side formwork 34 is arranged on both sides of the steel beam box chamber 1, and its outer dimensions match the linear dimensions of the concrete cantilever. The cantilever bottom formwork 33 is welded to the cantilever side formwork 34. The cantilever bottom formwork 33 is placed on the steel beam top plate 11 and is connected to the steel beam top plate 11 by welding.

[0027] Furthermore, as a preferred embodiment, it also includes steel-concrete connectors 35, and a plurality of steel-concrete connectors 35 are respectively provided on the box interior bottom form 31, the cantilever arm bottom form 33 and the cantilever arm side form 34. The steel-concrete connectors 35 in this embodiment use cylindrical head welding nails to avoid conflicts with the steel bars in the bridge deck. The steel-concrete connectors 35 are arranged on the inner side of the box interior bottom form 31, the cantilever arm bottom form 33 and the cantilever arm side form 34, and are welded to the box interior bottom form 31, the cantilever arm bottom form 33 and the cantilever arm side form 34, so that the box interior bottom form 31, the cantilever arm bottom form 33 and the cantilever arm side form 34 are combined with concrete, and the box interior bottom form 31, the cantilever arm bottom form 33 and the cantilever arm side form 34 are prevented from falling off during the operation of the bridge.

[0028] Further, as a preferred embodiment, the steel beam box chamber 1 includes a steel beam web 12, a steel beam diaphragm 13 and a steel beam top plate 11. Two steel beam diaphragms 13 are arranged between the two steel beam webs 12. A steel beam top plate 11 is arranged at the upper end of each steel beam web 12 and the two steel beam diaphragms 13. The steel beam web 12, the steel beam diaphragm 13 and the steel beam top plate 11 are welded together. Figure 2 As shown, two steel beam top plates 11 are provided.

[0029] Further, as a preferred embodiment, the support mechanism 2 includes a first diagonal brace 21, a second diagonal brace 22 and a longitudinal brace 23, one end of a plurality of first diagonal brace 21 and a plurality of second diagonal brace 22 are respectively connected to the web 12 of the steel beam, the other end of each first diagonal brace 21 is respectively connected to the lower side of the other end of a second diagonal brace 22, a plurality of longitudinal brace 23 are arranged at the upper ends of a plurality of second diagonal brace 22, and the cantilever arm bottom mold 33 is arranged at the upper ends of a plurality of longitudinal brace 23. Among them, the first diagonal brace 21, the second diagonal brace 22 and the longitudinal brace 23 can adopt H-shaped steel or rolled steel with higher bearing capacity and better stability. Secondly, the first diagonal brace 21, the second diagonal brace 22 and the web 12 of the steel beam are distributed in a triangular shape, which has stronger stability.

[0030] Further, as a preferred embodiment, it also includes a first support pad 24, a second support pad 25 and a third support pad 26, wherein a first support pad 24 is respectively provided between one end of the first diagonal brace 21 and the web 12 of the steel beam and between one end of the second diagonal brace 22 and the web 12 of the steel beam, a second support pad 25 is provided between the other end of the first diagonal brace 21 and the second diagonal brace 22, and a third support pad 26 is provided between the second diagonal brace 22 and the longitudinal brace 23. Among them, the first diagonal brace 21 and the second diagonal brace 22 are welded to the corresponding first support pad 24, and the first support pad 24 is connected to the web 12 of the steel beam by bolts. The first diagonal brace 21 is welded to the first support pad 24, the second support pad 25 is bolted to the second diagonal brace 22, the third support pad 26 is connected to the second diagonal brace 22, and the third support pad 26 is bolted to the longitudinal brace 23. Bolt holes are pre-opened on the first support pad 24, the second support pad 25, the third support pad 26, the steel beam web 12, the second diagonal brace 22 and the longitudinal support rod 23 for cooperation with the bolts.

[0031] Furthermore, as a preferred embodiment, the first diagonal brace 21 and the second diagonal brace 22 are both directly opposite to the steel beam cross diaphragm 13, which can prevent the steel beam web 12 from buckling and deformation, and the inclination rate of the second diagonal brace 22 is consistent with the slope of the lower edge of the concrete cantilever (the inclination rate of the cantilever bottom formwork 33).

[0032] In this embodiment, the first diagonal support rod 21, the second diagonal support rod 22 and the longitudinal support rod 23 form a support mechanism 2, and the box chamber bottom mold 31, the transverse stiffening mechanism 32, the cantilever arm bottom mold 33 and the cantilever arm side mold 34 form a template mechanism 3. The support mechanism 2 provides support for the template mechanism 3, avoiding the need to set up scaffolding under the bridge and saving space under the bridge. The first diagonal support, the second diagonal support and the longitudinal support are detachable and can be repeatedly reused, saving costs.

[0033] In this embodiment, after the support mechanism 2 and the formwork mechanism 3 are installed on the steel beam box chamber 1, they can be hoisted together with the steel beam box chamber 1, thereby reducing the construction process of setting up ground supports.

[0034] In this embodiment, the cantilever bottom formwork 33 and the cantilever side formwork 34 are bridge deck cantilever concrete formworks, which are arranged on both sides of the steel beam box chamber 1, and the outer dimensions match the linear dimensions of the concrete cantilever.

[0035] In this embodiment, the steel beam box chamber 1 may be provided with a plurality of steel beam boxes. Figure 5 As shown, the number of bottom molds 31 and transverse stiffening mechanisms 32 in the steel beam box chamber 1 can be increased according to the number of steel beam box chambers 1.

[0036] When in use, the first diagonal brace 21 and the second diagonal brace 22 can be installed first, and the first diagonal brace 21 and the second diagonal brace 22 can be installed on the steel beam web 12 at the position corresponding to the steel beam cross partition 13, and then the longitudinal support rod 23 can be installed, and then the box chamber bottom formwork 31, the transverse stiffening mechanism 32, the cantilever arm bottom formwork 33 and the cantilever arm side formwork 34 can be installed, and finally the steel-concrete connecting piece 35 can be installed. After the installation is completed, the support mechanism 2 and the formwork mechanism 3 and the steel beam box chamber 1 are hoisted to the designated position, and concrete is poured in the space formed by the box chamber bottom formwork 31, the transverse stiffening mechanism 32, the cantilever arm bottom formwork 33 and the cantilever arm side. After the concrete solidifies, the formwork mechanism 3 and the support mechanism 2 can be removed.

[0037] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A formwork support for cast-in-place bridge deck construction of a trough-shaped composite beam, characterized in that: It includes a steel beam box chamber, a support mechanism and a formwork mechanism. Two support mechanisms are provided on both sides of the steel beam web of the steel beam box chamber. The formwork mechanism includes a box chamber bottom formwork, a transverse stiffening mechanism, a cantilever bottom formwork and a cantilever side formwork. The box chamber bottom formwork is arranged at the upper end of the steel beam box chamber. The transverse stiffening mechanism is installed at the lower end of the box chamber bottom formwork. Two cantilever bottom formworks are provided at the outer edge of the bottom side of the cantilever of the concrete bridge deck. One cantilever side formwork is provided at each cantilever bottom formwork's end away from the box chamber bottom formwork. The cantilever bottom formwork is installed on the support mechanism.

2. The trough composite beam cast-in-place bridge deck construction formwork support as claimed in claim 1, characterized in that: The outer dimensions of the cantilever bottom formwork and the outer dimensions of the cantilever side formwork match the outer dimensions of the concrete bridge deck cantilever.

3. The formwork support for cast-in-situ bridge deck construction of a trough-shaped composite beam as claimed in claim 1, characterized in that: The outer dimensions of the bottom formwork inside the box chamber match the linear dimensions of the concrete slab of the bridge inside the box chamber.

4. The formwork support for cast-in-situ bridge deck construction of a trough-shaped composite beam as claimed in claim 1, characterized in that: It also includes a steel beam top plate, which is arranged between the box chamber bottom formwork and the cantilever arm bottom formwork.

5. The formwork support for cast-in-situ bridge deck construction of a trough composite beam as claimed in claim 1, characterized in that: It also includes steel-concrete connecting parts, and a plurality of the steel-concrete connecting parts are respectively provided on the bottom mold inside the box chamber, the bottom mold of the cantilever arm and the side mold of the cantilever arm.

6. The formwork support for cast-in-situ bridge deck construction of a trough composite beam as claimed in claim 4, characterized in that: The steel beam box chamber includes a steel beam cross-diaphragm and a steel beam top plate. Two steel beam cross-diaphragms are arranged between the two steel beam webs. A steel beam top plate is respectively arranged at the upper end of each steel beam web and the two steel beam cross-diaphragms.

7. The formwork support for cast-in-situ bridge deck construction of a trough composite beam as claimed in claim 6, characterized in that: The support mechanism includes a first diagonal brace, a second diagonal brace and a longitudinal brace. One end of several of the first diagonal braces and several of the second diagonal braces are respectively connected to the web of the steel beam, and the other end of each of the first diagonal braces is respectively connected to the lower side of the other end of a second diagonal brace. Several of the longitudinal support rods are arranged at the upper ends of several of the second diagonal braces, and the cantilever bottom mold is arranged at the upper ends of several of the longitudinal support rods.

8. The formwork support for cast-in-situ bridge deck construction of a trough composite beam as claimed in claim 7, characterized in that: It also includes a first support pad, a second support pad and a third support pad. The first support pad is respectively arranged between one end of the first diagonal brace and the web of the steel beam and between one end of the second diagonal brace and the web of the steel beam. The second support pad is arranged between the other end of the first diagonal brace and the second diagonal brace, and the third support pad is arranged between the second diagonal brace and the longitudinal support rod.

9. The formwork support for cast-in-situ bridge deck construction of a trough composite beam as claimed in claim 7, characterized in that: The first diagonal brace and the second diagonal brace are both directly opposite to the steel beam diaphragm.

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