Multi-azimuth anti-floating device for hollow slab girder

Abstract

A multi-azimuth anti-floating device for a hollow slab girder comprises a steel outer mold, a foam core mold, a reinforcement cage, an ejector rod and a plurality of limiting rods, the reinforcement cage comprises a reinforcement inner cage and a reinforcement outer cage which are both formed by binding or welding reinforcement after being spliced in a staggered mode, the reinforcement inner cage is arranged in the reinforcement outer cage, and the reinforcement inner cage and the reinforcement outer cage are relatively fixed; the foam core mold is arranged in the steel bar inner cage, the steel outer molds are arranged on the two sides of the steel bar inner cage, a plurality of connecting columns are arranged on the tops of the steel outer molds, horizontal connecting holes are formed in the connecting columns, the limiting rod stretches across the upper portion of the steel bar inner cage, and the two ends of the limiting rod are inserted into the two coaxial connecting holes respectively. And the ejector rod is arranged between the limiting rod and the reinforcement cage. The limiting rod stretches across the upper portion of the reinforcement cage, and the ejector rod is arranged between the limiting rod and the reinforcement cage, so that the whole reinforcement cage is in a downward pressing and fixing state, the reinforcement cage cannot float upwards due to buoyancy of a foam core mold during pouring, and the thickness of a protection layer of a bottom plate of the reinforcement cage is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of hollow slab beam casting, in particular to a multi-directional anti-floating device for hollow slab beams. Background Art

[0002] like Figure 1 As shown in the figure, during the casting of hollow slab beams, the method currently generally relies on layered casting of concrete and the deadweight of the steel cage to offset the floating of the core mold during the casting process. This method has the following problems: ① The casting speed is slow, and it needs to be cast in layers. After each layer is initially set, the lower layer is cast, which causes stratification and slow casting progress; ② During the casting process, the steel cage and the foam core mold move, and the linear shape and spatial position of the foam core mold are difficult to guarantee; ③ The local floating of the steel cage during the casting process causes the thickness of the steel protection layer of the hollow slab bottom plate to be uneven, and the discrete type is large; ④ In the original design, the annular stirrups are in contact with the foam core mold, and the force-bearing area is small. The annular stirrups at the top plate are easily squeezed into the foam core mold, resulting in insufficient thickness of the top plate. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model aims to provide a multi-directional anti-floating device for a hollow slab beam.

[0004] In order to solve the above problems, the utility model adopts the following technical solutions:

[0005] A multi-directional anti-floating device for a hollow slab beam comprises a steel outer formwork, a foam core formwork, a steel cage, a top rod and a plurality of limit rods, wherein the steel cage comprises a steel inner cage and a steel outer cage, and both are made by staggered overlapping and then binding or welding of steel bars, the steel inner cage is arranged inside the steel outer cage and the two are relatively fixed, the foam core formwork is arranged inside the steel inner cage, the steel outer formwork is arranged on both sides of the steel cage, a plurality of connecting columns are arranged on the top of the steel outer formwork, horizontal connecting holes are opened on the connecting columns, the connecting columns on the steel outer formworks on both sides of the steel cage are aligned with each other, wherein the connecting holes on any two mutually aligned connecting columns are coaxial with each other, the limit rod spans over the steel cage and its two ends are respectively inserted into two mutually coaxial connecting holes, the top rod is arranged between the limit rod and the steel cage, its upper end abuts against the bottom of the limit rod, and its lower end abuts against the top of the steel cage.

[0006] Preferably, the connecting columns and limiting rods are arranged at intervals of 1 m.

[0007] Preferably, the top rod includes a cross rod and a vertical rod, the lower end of the vertical rod is connected to the center of the cross rod, the two form a T-shaped connection, the cross rod is horizontally abutted against the top of the steel cage, and the upper end of the vertical rod is provided with a V-shaped support, and the V-shaped opening of the V-shaped support is upwardly abutted against the bottom of the limit rod.

[0008] Preferably, the steel outer formwork includes an upper formwork and a lower formwork, the lower formwork is wider than the upper formwork, and the two are connected by a chamfered formwork, the upper end of the chamfered formwork is inclined toward one side of the steel cage, the steel outer cage includes a top steel mesh, a bottom steel mesh and two side steel meshes, which are connected to each other in a rectangular shape, the side steel meshes include an upper web steel mesh and a lower web steel mesh, a chamfered surface steel mesh is connected between the upper web steel mesh and the lower web steel mesh, the chamfered surface steel mesh is parallel to the chamfered formwork, a plurality of first pads are connected to the chamfered surface steel mesh, and the first pads abut between the chamfered surface steel mesh and the chamfered formwork.

[0009] Preferably, the first pad is in the shape of a circular disc with a first fixing hole in the middle thereof. The first pad is sleeved on the steel bars of the chamfered surface steel mesh through the first fixing hole, and the edge of the first pad abuts against the chamfered template.

[0010] Preferably, a second pad is connected to the upper web reinforcement mesh and / or the lower web reinforcement mesh, and the second pad abuts between the upper template and the upper web reinforcement mesh and / or between the lower template and the lower web reinforcement mesh.

[0011] Preferably, the second pad is a circular disc with a second fixing hole in the middle. The second pad is sleeved on the steel bars of the upper web steel mesh and / or the lower web steel mesh through the second fixing hole, and the edge of the second pad abuts against the upper template and / or the lower template.

[0012] Preferably, the inner steel cage includes annular stirrups and a plurality of longitudinal horizontal bars, the bottom of the annular stirrups is connected to the bottom steel mesh, the top of the annular stirrups is arc-shaped, the foam core mold is placed below the top of the annular stirrups, the axial direction of the longitudinal horizontal bars is parallel to the axial direction of the foam core mold, and a plurality of longitudinal horizontal bars are evenly distributed along the arc-shaped top of the annular stirrups and abut against the annular stirrups and the foam core mold.

[0013] Preferably, the longitudinal horizontal ribs are steel bars with a diameter of 20 mm.

[0014] Preferably, the annular stirrup is a U-shaped steel bar, and the U-shaped opening is tied or welded to the bottom steel mesh downward, and the lower end of the annular stirrup is provided with an upwardly bent hook, and the hook is hung on the steel bar of the bottom steel mesh.

[0015] Beneficial effects of the utility model

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] The utility model arranges a plurality of connecting columns on the top of the steel outer formwork, and horizontal connecting holes are opened on the connecting columns. A limiting rod spans the top of the steel cage, and the two ends are respectively inserted into two coaxial connecting holes. A top rod is arranged between the limiting rod and the steel cage, and the upper end thereof abuts against the bottom of the limiting rod, and the lower end abuts against the top of the steel cage, so that the steel cage is in a downwardly pressed and fixed state as a whole, so that the steel cage will not float up due to the buoyancy of the foam core formwork during pouring, thereby ensuring the thickness of the protective layer of the bottom plate of the steel cage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Casting formwork and reinforcement cage for existing hollow slab beams;

[0019] Figure 2 It is a structural schematic diagram of the utility model;

[0020] Figure 3 It is a schematic diagram of the parts explosion of the utility model;

[0021] Figure 4 It is the front view of the utility model;

[0022] Figure 5 for Figure 3 A partial enlarged view of the middle A area;

[0023] Figure 6 for Figure 3 A partial enlarged view of area B. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0025] In the description of the present invention, it should be noted that the terms "upper / lower end", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "setting / sleeving", "sleeve connection", "connection", etc. should be understood in a broad sense. For example, "connection" 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.

[0027] See also Figure 2-6 The utility model provides a technical solution: a multi-directional anti-floating device for a hollow slab beam, comprising a steel outer formwork 1, a foam core formwork 2, a steel cage 3, a top rod 6 and a plurality of limit rods 7, wherein the steel cage 3 comprises a steel inner cage and a steel outer cage, and both are made by interlacing and assembling steel bars and then bundling or welding them, the steel inner cage is arranged inside the steel outer cage and the two are relatively fixed, the foam core formwork 2 is arranged inside the steel inner cage, the steel outer formwork 1 is arranged on both sides of the steel cage 3, a plurality of connecting columns 11 are arranged on the top of the steel outer formwork 1, horizontal connecting holes 12 are opened on the connecting columns 11, the connecting columns 11 on both sides of the steel cage 3 are aligned with each other, wherein the connecting holes 12 on any two mutually aligned connecting columns 11 are coaxial with each other, the limit rod 7 spans over the steel cage 3 and the two ends are respectively inserted into the two coaxial connecting holes 12, the top rod 6 is arranged between the limit rod 7 and the steel cage 3, the upper end thereof abuts against the bottom of the limit rod 7, and the lower end abuts against the top of the steel cage 3. The utility model arranges a plurality of connecting columns 11 on the top of the steel outer mold 1, and a horizontal connecting hole 12 is opened on the connecting column 11. The limiting rod 7 spans the top of the steel cage 3, and the two ends are respectively inserted into two coaxial connecting holes 12. The top rod 6 is arranged between the limiting rod 7 and the steel cage 3, and the upper end thereof abuts against the bottom of the limiting rod 7, and the lower end abuts against the top of the steel cage 3, so that the steel cage 3 is in a downwardly pressed and fixed state as a whole, so that the steel cage 3 will not float up due to the buoyancy of the foam core mold 2 during pouring, thereby ensuring the thickness of the protective layer of the bottom plate of the steel cage 3.

[0028] Furthermore, the connection columns 11 and the limit rods 7 are arranged at intervals of 1 m to ensure the overall linear shape of the steel cage 3 .

[0029] Furthermore, the top rod 6 includes a cross rod 61 and a vertical rod 62, the lower end of the vertical rod 62 is connected to the center of the cross rod 61, and the two form a T-shaped connection. The cross rod 61 is horizontally abutted against the top of the steel cage 3, and the upper end of the vertical rod 62 is provided with a V-shaped support 63. The V-shaped opening of the V-shaped support 63 abuts upward against the bottom of the limiting rod 7, thereby increasing the contact area between the upper and lower ends of the top rod 6 and the limiting rod 7 and the steel cage 3, so that it is stably connected between the two to prevent sliding and deviation.

[0030] Further, the steel outer mold 1 includes an upper mold 13 and a lower mold 14, the lower mold 14 is wider than the upper mold 13, and the two are connected by a chamfered template 15, the upper end of the chamfered template 15 is inclined toward one side of the steel cage 3, the steel outer cage includes a top steel mesh 51, a bottom steel mesh 55 and two side steel meshes, which are connected to each other in a rectangular shape, and the side steel meshes include an upper web steel mesh 52 and a lower web steel mesh 53, and the upper web steel mesh 52 and the lower web steel mesh 53 are connected There is a chamfered steel mesh 54, which is parallel to the chamfered template 15. A plurality of first pads 81 are connected to the chamfered steel mesh 54, which abuts between the chamfered steel mesh 54 and the chamfered template 15, so as to be supported between the steel cage 3 and the steel outer mold 1 through the first pads 81. Since the upper end of the chamfered template 15 is inclined toward the side of the steel cage 3, the first pads 81 can clamp the steel cage 3, thereby preventing the steel cage 3 from floating up and ensuring the thickness of the protective layer of the bottom plate and side plates of the steel cage 3.

[0031] Furthermore, the first pad 81 is in the shape of a circular disk, and a first fixing hole is provided in the middle thereof. The first pad 81 is sleeved on the steel bars of the chamfered surface steel mesh 54 through the first fixing hole, and the edge of the first pad 81 abuts on the chamfered angle template 15. By providing the first fixing hole, it is convenient to install the first pad 81 on the chamfered surface steel mesh 54. Specifically, in the present utility model, the thickness of the first pad 81 abutting between the chamfered surface steel mesh 54 and the chamfered angle template 15 is 32 mm, which ensures the thickness of the concrete protective layer, and the first pad 81 uses the same concrete as that used when casting the hollow slab beam, so that the first pad 81 is cast in the hollow slab beam and formed as a whole.

[0032] Furthermore, a second pad 82 is connected to the upper web reinforcement mesh 52 and / or the lower web reinforcement mesh 53, and the second pad 82 abuts between the upper template 13 and the upper web reinforcement mesh 52 and / or between the lower template 14 and the lower web reinforcement mesh 53, thereby preventing the reinforcement cage 3 from moving left and right.

[0033] Furthermore, the second pad 82 is in the shape of a circular disk, and a second fixing hole is provided in the middle thereof. The second pad 82 is sleeved on the steel bars of the upper web reinforcement mesh 52 and / or the lower web reinforcement mesh 53 through the second fixing hole, and the edge of the second pad 82 abuts on the upper formwork 13 and / or the lower formwork 14. By providing the second fixing hole, it is convenient to install the second pad 82 on the steel bars of the upper web reinforcement mesh 52 and / or the lower web reinforcement mesh 53. Specifically, in the utility model, the thickness of the second pad 82 abutting between the upper formwork 13 and the upper web reinforcement mesh 52 and / or between the lower formwork 14 and the lower web reinforcement mesh 53 is 32 mm, which ensures the thickness of the concrete protective layer, and the second pad 82 uses the same concrete as that used when casting the hollow slab beam, so that the second pad 82 is cast in the hollow slab beam and formed as a whole.

[0034] Furthermore, the inner steel cage includes an annular hoop 41 and a plurality of longitudinal horizontal ribs 42. The bottom of the annular hoop 41 is connected to the bottom steel mesh 55. The top of the annular hoop 41 is arc-shaped. The foam core mold 2 is placed below the top of the annular hoop 41. The axial direction of the longitudinal horizontal ribs 42 is parallel to the axial direction of the foam core mold 2. A plurality of longitudinal horizontal ribs 42 are evenly distributed along the arc-shaped top of the annular hoop 41 and abut against the annular hoop 41 and the foam core mold 2, so that the longitudinal horizontal ribs 42 are in contact with the foam core mold 2, increasing the contact force area between the foam core mold 2 and the steel bar, and the axial direction of the longitudinal horizontal ribs 42 is parallel to the axial direction of the foam core mold 2, accurately controlling the position line of the foam core mold 2 to ensure that the top plate thickness is qualified.

[0035] Specifically, the longitudinal horizontal ribs 42 are steel bars with a diameter of 20 mm.

[0036] Furthermore, the annular stirrup 41 is a U-shaped steel bar, and the U-shaped opening is tied or welded downward on the bottom steel mesh 55. The lower end of the annular stirrup 41 is provided with an upwardly bent hook 411, and the hook 411 is hung on the steel bars of the bottom steel mesh 55 to ensure a firm connection between the inner steel cage and the outer steel cage.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. 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 sentence "includes an element defined by ... does not exclude the existence of other identical elements in the process, method, article or device including the element".

[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-directional anti-floating device for hollow slab beams, characterized in that: The invention comprises a steel outer formwork (1), a foam core formwork (2), a steel cage (3), a top rod (6) and a plurality of limit rods (7); the steel cage (3) comprises a steel inner cage and a steel outer cage, and both are made by interlacing and assembling steel bars and then bundling or welding them; the steel inner cage is arranged inside the steel outer cage and the two are relatively fixed; the foam core formwork (2) is arranged inside the steel inner cage; the steel outer formwork (1) is arranged on both sides of the steel cage (3); a plurality of connecting columns (11) are arranged on the top of the steel outer formwork (1); the connecting columns (11) are arranged on the top of the steel outer formwork (1); and the connecting columns (11) are arranged on the top of the steel outer formwork (1). ) is provided with a horizontal connection hole (12), the connection columns (11) on the steel outer molds (1) on both sides of the steel cage (3) are aligned with each other, wherein the connection holes (12) on any two mutually aligned connection columns (11) are coaxial with each other, the limit rod (7) spans the top of the steel cage (3) and the two ends are respectively inserted into the two coaxial connection holes (12), the top rod (6) is arranged between the limit rod (7) and the steel cage (3), the upper end of which abuts against the bottom of the limit rod (7) and the lower end abuts against the top of the steel cage (3).

2. The multi-directional anti-floating device for hollow slab beam according to claim 1 is characterized in that: The connecting columns (11) and the limiting rods (7) are arranged at intervals of 1 m.

3. The multi-directional anti-floating device for hollow slab beam according to claim 2 is characterized in that: The top rod (6) comprises a cross rod (61) and a vertical rod (62), the lower end of the vertical rod (62) is connected to the center of the cross rod (61), and the two form a T-shaped connection, the cross rod (61) is horizontally abutted against the top of the steel cage (3), and the upper end of the vertical rod (62) is provided with a V-shaped support (63), and the V-shaped opening of the V-shaped support (63) is upwardly abutted against the bottom of the limit rod (7).

4. The multi-directional anti-floating device for hollow slab beam according to claim 1, characterized in that: The steel outer formwork (1) comprises an upper formwork (13) and a lower formwork (14), wherein the lower formwork (14) is wider than the upper formwork (13), and the two are connected by a chamfered angle formwork (15), wherein the upper end of the chamfered angle formwork (15) is inclined toward one side of the steel cage (3), and the steel outer cage comprises a top steel mesh (51), a bottom steel mesh (55) and two side steel meshes, which are connected to each other in a rectangular shape, wherein the side steel meshes comprise an upper web steel mesh (52) and a lower web steel mesh (53), wherein a chamfered surface steel mesh (54) is connected between the upper web steel mesh (52) and the lower web steel mesh (53), wherein the chamfered surface steel mesh (54) is parallel to the chamfered angle formwork (15), and wherein a plurality of first pads (81) are connected to the chamfered surface steel mesh (54), wherein the first pads (81) are abutted between the chamfered surface steel mesh (54) and the chamfered angle formwork (15).

5. The multi-directional anti-floating device for hollow slab beams according to claim 4 is characterized in that: The first pad (81) is in the shape of a circular disk with a first fixing hole in the middle thereof. The first pad (81) is sleeved on the steel bars of the chamfered surface steel mesh (54) through the first fixing hole, and the edge of the first pad (81) abuts against the chamfered template (15).

6. The multi-directional anti-floating device for hollow slab beams according to claim 4 is characterized in that: A second pad (82) is connected to the upper web reinforcement mesh (52) and / or the lower web reinforcement mesh (53), and the second pad (82) abuts between the upper template (13) and the upper web reinforcement mesh (52) and / or between the lower template (14) and the lower web reinforcement mesh (53).

7. The multi-directional anti-floating device for hollow slab beam according to claim 6, characterized in that: The second pad (82) is in the shape of a circular disk with a second fixing hole in the middle thereof. The second pad (82) is sleeved on the steel bars of the upper web steel mesh (52) and / or the lower web steel mesh (53) through the second fixing hole, and the edge of the second pad (82) abuts against the upper formwork (13) and / or the lower formwork (14).

8. The multi-directional anti-floating device for hollow slab beams according to claim 4, characterized in that: The steel inner cage comprises an annular stirrup (41) and a plurality of longitudinal horizontal bars (42); the bottom of the annular stirrup (41) is connected to the bottom steel mesh (55); the top of the annular stirrup (41) is in an arc shape; the foam core mold (2) is placed below the top of the annular stirrup (41); the axial direction of the longitudinal horizontal bar (42) is parallel to the axial direction of the foam core mold (2); and the plurality of longitudinal horizontal bars (42) are evenly distributed along the arc shape of the top of the annular stirrup (41) and abut against the annular stirrup (41) and the foam core mold (2).

9. The multi-directional anti-floating device for hollow slab beams according to claim 8, characterized in that: The longitudinal horizontal ribs (42) are steel bars with a diameter of 20 mm.

10. The multi-directional anti-floating device for hollow slab beam according to claim 8, characterized in that: The annular stirrup (41) is a U-shaped steel bar, and the U-shaped opening is tied or welded to the bottom steel mesh (55) with the opening facing downward. The lower end of the annular stirrup (41) is provided with an upwardly bent hook (411), and the hook (411) is hung on the steel bars of the bottom steel mesh (55).

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