Force transmission device for cement concrete pavement

Abstract

The utility model relates to the technical field of road construction, and discloses a force transmission device of a cement concrete pavement, which comprises two supporting devices, a sleeve and a force transmission rod, the force transmission rod is connected in the sleeve through an elastic piece and partially exposed out of the sleeve, and one of the supporting devices is supported at one end of the sleeve. And the other supporting device is supported at the other end of the sleeve. The cement concrete pavement is not prone to cracking, the force transmission device is convenient to install and rapid in positioning, and the load transmission capacity of the joints is high.

Description

Technical Field

[0001] This utility model relates to the field of road construction technology, specifically to a force transmission device for cement concrete pavement. Background Technology

[0002] The force-transfer device in cement concrete pavement consists of dowel bars arranged at regular intervals along the transverse joints of the pavement slab, centered on the slab thickness. These dowel bars are primarily made of steel reinforcement and are designed so that one end is fixed within one side of the pavement slab, while the other end can slide freely within the adjacent slab. This design allows the pavement slab to undergo some displacement under temperature changes or vehicle loads, while simultaneously transferring the load to adjacent cement concrete blocks via the dowel bars. The main function of the dowel bars is to transfer traffic loads between two pavement slabs, prevent misalignment, and increase stress transfer between adjacent cement concrete blocks, thus preventing uneven settlement of the cement concrete pavement caused by excessive localized stress. By transferring stress, the dowel bars enable adjacent cement concrete blocks to share the load, thereby improving the load-bearing capacity and stability of the entire pavement system.

[0003] Chinese patent document CN208279964U discloses a novel integral structure for a force transmission rod, comprising a force transmission rod, a sleeve, and a bracket. One end of the force transmission rod is inserted into the sleeve, and the portion of the force transmission rod inserted into the sleeve is provided with two sets of retaining rings. An asphalt coating is provided between the two sets of retaining rings. A marking line is provided on the middle surface of the force transmission rod. A bracket limiting ring is provided at the other end of the force transmission rod. A sleeve opening is provided at the connection between the sleeve and the force transmission rod, and a contraction joint is provided on the sleeve opening. A bracket limiting ring is provided on the outer side of the bottom of the sleeve. A set of springs is fixedly connected inside the sleeve, and the other end of the springs is in contact with the end face of the force transmission rod. A bracket is fixedly connected below the bracket limiting rings. A slot is provided at the upper end of the bracket, and the sleeve and the force transmission rod are placed in the slot and locked in place. A support rod is provided below the slot.

[0004] Chinese patent document CN208279964U has the following shortcomings: the cement concrete at the connection between the force transmission rod and the sleeve is prone to cracking. Utility Model Content

[0005] To solve the technical problem of cracking in cement concrete pavement, this utility model provides a force transmission device for cement concrete pavement, including two support devices, a sleeve and a force transmission rod. The force transmission rod is connected inside the sleeve by an elastic element and partially exposed outside the sleeve. One of the support devices is supported at one end of the sleeve, and the other support device is supported at the other end of the sleeve.

[0006] To improve load-bearing strength and prevent road cracking, one end of the sleeve is solid, and the other end is an open hollow end.

[0007] To improve the connection strength between the sleeve and the cement concrete, the outer surface of the solid end of the sleeve has a rough structure.

[0008] Preferably, the outer surface of the solid end of the sleeve has a threaded structure.

[0009] To prevent the force transmission rod from moving left or right, a baffle is provided at the opening of the sleeve, which limits and positions the support device at the hollow end.

[0010] To facilitate rapid positioning and prevent misalignment of the cement concrete pavement, the support device includes a support rod and a sleeve. The top of the support rod is connected to the sleeve, and the sleeve is fitted onto the sleeve. The sleeve can be directly inserted laterally through the sleeve.

[0011] To facilitate connection and fixation to cement concrete, the support rod is supported in the middle by multiple diagonal braces.

[0012] To improve service life, an anti-corrosion layer is provided on the surface of the sleeve.

[0013] This utility model has the following beneficial effects:

[0014] 1. The sleeve of this utility model has a solid end at one end and an open hollow end at the other end. The support device supports the sleeve at the same time, avoiding the problem of cracking that would occur when the open end is located at the joint of two cement concrete slabs. The open end of the sleeve of this utility model is located deep in the cement concrete, far away from the joint, and the sleeve is smooth without any height difference, which reduces stress concentration caused by the irregularity of the sleeve open end and the dowel bar, and avoids road surface cracking.

[0015] 2. Compared with the existing technology, the installation of the force transmission device requires adjustment of the overall level of the force transmission rod, sleeve and support device, which is inconvenient during construction. However, this application can quickly position and is easy to install. After the two support devices are positioned in advance, the sleeve is directly inserted horizontally into the sleeve. There is no need to position the sleeve and force transmission rod, which ensures the overall level, avoids misalignment of cement concrete slabs and improves construction efficiency.

[0016] 3. This utility model enhances the load-bearing capacity of cement concrete pavement joints by strengthening the support structure and sleeve structure. The threaded solid end works in conjunction with the support structure to improve the load-bearing capacity of cement concrete pavement joints, thereby improving the construction quality of cement concrete pavement. The telescopic dowel bar can adapt to changes in temperature and load, strengthen the stability of the pavement structure, and improve the smoothness and service quality of the pavement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an embodiment of the force transmission device for cement concrete pavement according to the present invention.

[0018] Figure 2 This is a schematic diagram of the support device. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation method:

[0020] 1. The reference numerals in the accompanying drawings include: support device 1, support rod 101, sleeve 102, diagonal brace 103, ring part 104, sleeve 2, solid end 201, hollow end 202, force transmission rod 3, spring 4, baffle 5, anti-corrosion layer 6.

[0021] Example 1

[0022] like Figure 1 and 2 As shown, a force transmission device for a cement concrete pavement includes two support devices 1, a sleeve 2, and a force transmission rod 3. The sleeve 2 has a solid end 201 on the left and an open hollow end 202 on the right. The force transmission rod 3 is connected to the hollow end 202 of the sleeve 2 by a spring 4 and is partially exposed outside the sleeve 2. One of the support devices 1 is supported on the left end of the sleeve 2, and the other support device 1 is supported at the open end of the right end of the sleeve 2.

[0023] The solid end 201 of the sleeve 2 occupies half the length of the sleeve 2, and the hollow end 202 occupies half the length of the sleeve 2. The force transmission rod 3 is connected to the middle position of the sleeve 2 by a spring 4.

[0024] The outer surface of the solid end 201 of the sleeve 2 has a threaded structure.

[0025] The sleeve 2 is provided with a baffle 5 at the opening. The baffle 5 limits and positions the support device 1 of the hollow end 202 to prevent the support device 1 from falling off.

[0026] The support device 1 includes a support rod 101 and a sleeve 102. The top of the support rod 101 is connected to the sleeve 102. The sleeve 102 is sleeved on the sleeve 2. The diameter of the sleeve 102 is slightly larger than that of the sleeve 2. The sleeve 2 can be directly inserted laterally into the sleeve 102.

[0027] The middle part of the support rod 101 is supported by two diagonal braces 103 connected by a ring member 104.

[0028] The sleeve 2 is provided with an anti-corrosion layer 6. The anti-corrosion layer 6 can be coated with zinc using surface galvanizing technology; or it can be coated with grease, asphalt, or powder coating. This can prevent the force transmission device from rusting and also prevent the force transmission rod 3 from sticking to the cement concrete.

[0029] The two support devices 1 are respectively placed in the cement concrete layer for positioning. After positioning, the sleeve 2 with the force transmission rod 3 is simultaneously inserted into the support device 1. After all the cement concrete is poured, the middle part of the sleeve 2 is located at the joint of the two cement concrete layers.

[0030] The above descriptions are merely embodiments of this utility model. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are knowledgeable of all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Therefore, those skilled in the art can, based on the guidance provided in this application, improve and implement this solution in conjunction with their own capabilities. Typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A force transmission device for a cement concrete pavement, comprising two support devices, a sleeve, and a force transmission rod, wherein the force transmission rod is connected inside the sleeve via an elastic element and partially protrudes outside the sleeve, wherein one of the support devices is supported at one end of the sleeve, characterized in that, Another support device is supported at the other end of the sleeve.

2. The force transmission device for cement concrete pavement according to claim 1, characterized in that: One end of the sleeve is solid, and the other end is an open hollow end.

3. The force transmission device for cement concrete pavement according to claim 2, characterized in that: The outer surface of the solid end of the sleeve has a rough structure.

4. The force transmission device for cement concrete pavement according to claim 3, characterized in that: The outer surface of the solid end of the sleeve has a threaded structure.

5. The force transmission device for cement concrete pavement according to claim 4, characterized in that: A baffle is provided at the opening of the sleeve, and the baffle limits and positions the support device at the hollow end.

6. The force transmission device for cement concrete pavement according to claim 5, characterized in that: The support device includes a support rod and a sleeve. The top of the support rod is connected to the sleeve, and the sleeve is fitted onto the sleeve. The sleeve can be directly inserted laterally through the sleeve.

7. The force transmission device for cement concrete pavement according to claim 6, characterized in that: The support rod is supported in the middle by multiple diagonal braces.

8. The force transmission device for cement concrete pavement according to claim 7, characterized in that: The sleeve is provided with an anti-corrosion layer.

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