Force transfer rod front support for false joint of airport concrete pavement

Abstract

The utility model relates to an airport concrete pavement false seam dowel bar front support, and relates to the technical field of road construction equipment, the airport concrete pavement false seam dowel bar front support comprises two sets of front support cross bars arranged in parallel, and each set of front support cross bars is provided with a plurality of front support supporting legs; the front support supporting legs are arranged at equal intervals in the length direction of the front support transverse rod, the front support supporting legs bypass the upper portion of the front support transverse rod and are fixedly connected to the front support transverse rod, and a plurality of front support vertical rods are fixedly connected to the front support transverse rod. The front support vertical rods correspond to the front support supporting legs in a one-to-one mode, and gaps used for containing dowel bar bodies are reserved between the front support supporting legs and the front support vertical rod supports. The concrete vibrating device has the effect that the situation that the dowel bar horizontally shifts during concrete vibrating is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of road construction equipment, and particularly relates to a pre-embedded bracket for dowel bars of false joints on airport concrete pavements. Background Art

[0002] A dowel bar refers to a round steel bar arranged at the center of the plate thickness at a certain distance along the transverse joints of a cement concrete pavement slab. One end of it is fixed in one side slab, and the other end can slide in the adjacent side slab. Its function is to transfer the traffic load between two pavement slabs and prevent uneven settlement, increase the stress transfer between adjacent concrete blocks to prevent large local stress on the concrete pavement, and transfer stress so that adjacent concrete blocks bear the load together. Its depth is generally half of the thickness of the concrete pavement slab.

[0003] When carrying out continuous concrete pouring construction, usually after the paving is completed, an anti-theft device for dowel bars of airport runway cement concrete pavements is immediately used, usually an anti-theft dowel bar bracket and a vibration motor connection device, to vibrate the dowel bars to the designed positions of the pavement slabs.

[0004] In related technologies, the installation of dowel bars usually adopts the construction method of vibrating and inserting dowel bars after pouring. The above construction method is extremely likely to cause quality problems such as the displacement of dowel bars and the failure of dowel bars to reach the designed positions, which will lead to risks such as tearing and slab breakage of the pavement slab width during the later pavement construction process, affecting the durability of the cement concrete pavement. Utility Model Content

[0005] In order to reduce the horizontal displacement of dowel bars during concrete vibration, the present application provides a pre-embedded bracket for dowel bars of false joints on airport concrete pavements.

[0006] The pre-embedded bracket for dowel bars of false joints on airport concrete pavements provided by the present application adopts the following technical solutions:

[0007] A pre-embedded bracket for dowel bars of false joints on airport concrete pavements includes two groups of parallel pre-embedded bracket cross bars. A plurality of pre-embedded bracket support legs are provided on each group of the pre-embedded bracket cross bars. The pre-embedded bracket support legs are arranged at equal intervals along the length direction of the pre-embedded bracket cross bars. The pre-embedded bracket support legs bypass the upper part of the pre-embedded bracket cross bars and are fixedly connected to the pre-embedded bracket cross bars. A plurality of pre-embedded bracket vertical bars are fixedly connected to the pre-embedded bracket cross bars. The pre-embedded bracket vertical bars correspond to the pre-embedded bracket support legs one by one. A gap for placing the dowel bar body is left between the pre-embedded bracket support legs and the pre-embedded bracket vertical bars.

[0008] By adopting the above technical solution, before the pavement concrete is poured, it is necessary to determine the layout spacing of the dowel bars and the size of the pavement slabs according to the elevation map of the pavement blocks and the size map of the pavement blocks, so as to determine the setting method and specific size of the false joint dowel bar front support of the pavement, prepare materials in advance, and prepare to make the front support in advance. During the concrete pouring, directly place the front support at the designed position of the dowel bar, then place the dowel bar body between the vertical rod of the front support and the support leg of the front support, and limit the movement of the dowel bar through the vertical rod of the front support and the support leg of the front support. Subsequently, carry out concrete pouring, and use a vibrating rod to perform point vibration treatment within 20 cm before and after the dowel bar, and it is not allowed to use row vibration. Thus, the vertical rod of the front support and the support leg of the front support will jointly control the horizontal position of the dowel bar, reducing the occurrence of horizontal deviation of the dowel bar during concrete vibration.

[0009] Optionally, each group of the front support crossbars is provided with two, and the two front support crossbars are arranged in parallel and at the same height.

[0010] By adopting the above technical solution, on the premise of considering the economic cost, the two front support crossbars can provide a placement plane for the ends of the dowel bar body, improving the stability of the dowel bar body on the front support crossbars.

[0011] Optionally, the front support crossbar is provided with a fixing component for fixing the front support vertical rod on the front support crossbar, and the front support vertical rod is fixed on the front support crossbar through the fixing component.

[0012] By adopting the above technical solution, the disassembly of the front support vertical rod on the front support crossbar can be realized through the fixing component, which is convenient for the transportation of this device and at the same time convenient for replacing the front support crossbar.

[0013] Optionally, the fixing component includes a plurality of countersunk bolts, and the countersunk bolts correspond to the front support crossbars one by one, and the countersunk bolts are simultaneously threadedly connected to the front support vertical rod and the front support crossbar.

[0014] By adopting the above technical solution, by rotating the countersunk bolt, the rod part of the countersunk bolt can be disengaged from the front support crossbar, and thus the fixation of the front support vertical rod on the front support crossbar can be quickly cancelled.

[0015] Optionally, a plurality of threaded holes for threaded connection of the countersunk bolts are formed on the front support crossbar, and the plurality of threaded holes are arranged at equal intervals along the length direction of the front support crossbar.

[0016] By adopting the above technical solution, by threadedly connecting the countersunk bolts into the threaded holes at different positions, the distance between the front support vertical rod and the front support leg can be changed.

[0017] Optionally, a protective stud is threadedly connected in the threaded hole, and a cross slot is formed at one end of the protective stud away from the bottom of the threaded hole.

[0018] By adopting the above technical solution, the threaded hole can be protected by the protective stud, and at the same time, the front support cross bar provided with the threaded hole can also be strengthened. During use, only an external tool needs to be used to rotate the protective stud through the cross slot to disengage the protective stud from the threaded hole.

[0019] In summary, the present application includes at least one of the following beneficial technical effects:

[0020] 1. Improving the bearing capacity and durability of the pavement: The bearing capacity of the overall structure is improved, enabling the pavement to withstand greater traffic loads, helping to disperse stress and reduce stress concentration, thereby extending the service life of the pavement;

[0021] 2. Facilitating construction and maintenance: The installation process of the load transfer bars of the front support is relatively simple and easy to operate. Moreover, during the maintenance and repair of the pavement, the presence of the load transfer bars helps the bonding of new and old pavement materials, improving the repair effect;

[0022] 3. Improving the construction quality: The accurate installation of the load transfer bars helps to improve the overall construction quality of the pavement and reduce possible subsequent quality problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the overall structural schematic diagram of Embodiment 1 of the present application;

[0024] Figure 2 is the overall structural schematic diagram of Embodiment 2 of the present application;

[0025] Figure 3 is Figure 2 the partial enlarged schematic diagram of part A in

[0026] In the figure, 1 is the front support cross bar; 11 is the threaded hole; 2 is the front support leg; 3 is the front support vertical bar; 4 is the load transfer bar body; 6 is the fixing component; 61 is the countersunk head bolt; 7 is the protective stud; 71 is the cross slot. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] The following Figure 1 - Figure 3 , further describes the present application in detail.

[0028] Embodiment 1: A front support for load transfer bars in a false joint of an airport concrete pavement, referring to Figure 1 , includes two groups of parallel front support cross bars 1, and the number of front support cross bars 1 in each group is set to two. The two front support cross bars 1 are parallel and at the same height.

[0029] Each front support cross bar 1 is provided with a plurality of front support legs 2, and the front support legs 2 are arranged in a convex shape. The middle section of the front support leg 2 bypasses the upper part of the front support cross bar 1 and the front support leg 2 is welded to the front support cross bar 1. The plurality of front support legs 2 are arranged at equal intervals along the length direction of the front support cross bar 1.

[0030] A plurality of front support vertical bars 3 are fixedly connected to two front support cross bars 1 of the same group, and the front support vertical bars 3 are fixedly connected to the front support cross bars 1 by welding. The front support vertical bars 3 are arranged perpendicular to the front support cross bars 1. The front support vertical bars 3 correspond to the front support legs 2 one by one, and a gap for placing the force transmission rod body 4 is left between the front support leg 2 and the front support vertical bar 3, and the force transmission rod body 4 is placed in this gap.

[0031] The implementation principle of Embodiment 1 is: Place the force transmission rod body 4 between the front support vertical bar 3 and the front support leg 2, and limit the movement of the force transmission rod body 4 through the front support vertical bar 3 and the front support leg 2. Then, concrete is poured. At this time, the front support vertical bar 3 and the front support leg 2 will jointly control the horizontal position of the force transmission rod body 4.

[0032] Embodiment 2

[0033] The difference from Embodiment 1 is: Refer to Figure 2 and Figure 3 , a fixing component 6 for fixing the front support vertical bar 3 on the front support cross bar 1 is provided on the front support cross bar 1, and the front support vertical bar 3 is fixed on the front support cross bar 1 through the fixing component 6. In this embodiment, the fixing component 6 includes a plurality of countersunk head bolts 61, and the countersunk head bolts 61 correspond to the front support cross bar 1 one by one. The countersunk head bolts 61 are threadedly connected to the upper end of the front support vertical bar 3, and a plurality of threaded holes 11 for the countersunk head bolts 61 to be threadedly connected are opened on the front support cross bar 1. The plurality of threaded holes 11 are arranged at equal intervals along the length direction of the front support cross bar 1. The rod portion of the countersunk head bolt 61 passes through the front support vertical bar 3 and is threadedly connected to one of the plurality of threaded holes 11 threaded on the front support cross bar 1.

[0034] In order to improve the strength of the front support cross bar 1 provided with the threaded holes 11, a protective stud 7 is threadedly connected to each of the threaded holes 11 not threadedly connected with the countersunk head bolts 61, and a cross groove 71 is opened at one end of the protective stud 7 away from the bottom of the threaded hole 11.

[0035] The implementation principle of Embodiment 2 is as follows: By rotating the countersunk bolt 61, the rod portion of the countersunk bolt 61 is disengaged from the threaded hole 11, thereby realizing the disassembly of the vertical rod 3 of the front bracket on the cross bar 1 of the front bracket. At the same time, the countersunk bolt 61 can be threadedly connected to the threaded holes 11 at different positions, thereby changing the distance between the vertical rod 3 of the front bracket and the support leg 2 of the front bracket, and further adapting to the force transmission rod body 4 with different diameters.

[0036] The embodiments of the specific implementation manners are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A front bracket of a false joint dowel rod for an airport concrete pavement, characterized in that: The invention comprises two groups of front bracket cross bars (1) arranged in parallel, each group of the front bracket cross bars (1) is provided with a plurality of front bracket support legs (2), the front bracket support legs (2) are arranged equidistantly along the length direction of the front bracket cross bars (1), the front bracket support legs (2) bypass the upper part of the front bracket cross bars (1) and are fixedly connected to the front bracket cross bars (1), the front bracket cross bars (1) are fixedly connected with a plurality of front bracket vertical bars (3), the front bracket vertical bars (3) correspond to the front bracket support legs (2) one by one, and a gap for accommodating a force transmission rod body (4) is reserved between the front bracket support legs (2) and the front bracket vertical bars (3) brackets.

2. The airport concrete pavement false joint dowel rod front bracket according to claim 1, characterized in that: Each group of the front support cross bars (1) is provided with two, and the two front support cross bars (1) are arranged in parallel and at the same height.

3. The airport concrete pavement false joint dowel rod front bracket according to claim 1, characterized in that: The front support vertical rod (3) is welded to the front support cross rod (1).

4. The airport concrete pavement false joint dowel rod front bracket according to claim 1, characterized in that: The front bracket support leg (2) is welded to the front bracket cross bar (1).

5. The airport concrete pavement false joint dowel rod front bracket according to claim 1, characterized in that: The front support cross bar (1) is provided with a fixing assembly (6) for fixing the front support vertical bar (3) on the front support cross bar (1); the front support vertical bar (3) is fixed to the front support cross bar (1) via the fixing assembly (6).

6. The airport concrete pavement false joint dowel rod front bracket according to claim 5, characterized in that: The fixing assembly (6) comprises a plurality of countersunk bolts (61), each of the countersunk bolts (61) corresponding to the front bracket cross bar (1) one by one, and the countersunk bolts (61) are simultaneously threadedly connected to the front bracket vertical bar (3) and the front bracket cross bar (1).

7. The airport concrete pavement false joint dowel rod front bracket according to claim 6, characterized in that: The front bracket cross bar (1) is provided with a plurality of threaded holes (11) for threaded connection of the countersunk bolts (61), and the plurality of threaded holes (11) are arranged at equal distances along the length direction of the front bracket cross bar (1).

8. The airport concrete pavement false joint dowel rod front bracket according to claim 7, characterized in that: The threaded hole (11) is internally threadedly connected with a protective stud (7), and one end of the protective stud (7) away from the bottom of the threaded hole (11) is provided with a cross groove (71).

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