A tool for forming expansion joints in concrete roadways

Abstract

The utility model belongs to a kind of expansion joint forming tool used in concrete road;Including expansion joint forming plate, the top of expansion joint forming plate is equipped with the corner guard for protecting the included angle between concrete road and expansion joint;With convenient operation, expansion joint is flat and beautiful after construction, can guarantee subsequent crack pouring quality, will not appear the defect of joint edge collapse, simultaneously, the utility model can be realized repeatedly used, to reach the advantage of reducing construction cost.

Description

Technical Field

[0001] This utility model belongs to the technical field of concrete road construction equipment, specifically a tool for forming expansion joints used in concrete roads. Background Technology

[0002] Expansion joints (also known as expansion joints or temperature joints) in cast-in-place concrete roads are key structures designed to control the thermal expansion and contraction stress caused by temperature changes in the pavement. They prevent cracks caused by the expansion or contraction of concrete due to temperature fluctuations. They guide crack location: by pre-setting the joint, cracks are concentrated at the designed location, avoiding random cracking. Their main function is to ensure effective stress release and prevent irregular cracks. Existing expansion joint construction processes mainly use two methods: 1. Pre-embedded method: Materials such as wooden boards, foam boards, or rubber strips are pre-embedded during concrete pouring. After the concrete hardens, these are removed, the groove is cleaned, and then the joint is filled. However, due to the expansion and compression of the concrete, these materials are almost impossible to remove. Furthermore, the deformation and compression make cleaning the gaps difficult, and straightness cannot be guaranteed, affecting subsequent construction and aesthetics. 2. Cutting method: This involves using a cutting machine to cut the concrete, followed by filling. Cutting the joint too early can lead to edge chipping, while cutting too late may result in natural cracks, making timing difficult. Additionally, the cutting process generates a lot of dust and noise, affecting the surrounding environment. Utility Model Content

[0003] To overcome the above deficiencies, this utility model provides a tool for forming expansion joints in concrete roads, thereby solving the technical problems existing in the prior art.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] An expansion joint forming tool for use in concrete roads includes an expansion joint forming plate with a corner guard on the top for protecting the angle between the concrete road and the expansion joint.

[0006] The beneficial effects of this utility model are as follows: When in use, the outer surface of this utility model is coated with a release agent. Before the ground is poured and solidified, this utility model is inserted into the required position. After initial setting and shaping, it can be pulled out. The above-mentioned expansion joint forming plate and corner protector work together to not only avoid uneven gaps caused by chipping, but also ensure the straightness, depth and width of the expansion joint are consistent, so as to achieve the characteristics of no need for subsequent cleaning and good aesthetics. Compared with the pre-embedded method, the above method avoids the defects of affecting the leveling of the ground during construction and the difficulty of cleaning the expansion joint afterward. Compared with the cutting method, the cutting time is difficult to control (too early may cause chipping, too late may have natural cracks), and there are problems of dust and noise pollution in the environment during the cutting process.

[0007] Preferably, the expansion joint forming plate is made of corrosion-resistant metal.

[0008] Preferably, the expansion joint forming plate is made of stainless steel.

[0009] Preferably, the corner guard includes at least a corner guard plate connected to the top of the expansion joint forming plate and arranged parallel to the concrete road.

[0010] Preferably, the corner guard also includes a V-shaped inclined plate on the top of the expansion joint forming plate, and corner guards are respectively provided on the outer side of the top of the inclined plate, which are parallel to the concrete road.

[0011] Preferably, the corner guard is provided with a handle at the top for lifting the expansion joint forming plate out of the concrete.

[0012] Preferably, the handle is an arc-shaped structure, with one end of the arc-shaped structure connected to a corner guard on one side and the other end of the arc-shaped structure connected to a corner guard on the other side.

[0013] Preferably, the expansion joint forming plate, inclined plate, corner guard plate and handle are made of the same material and are an integral structure.

[0014] The advantages of this utility model are as follows:

[0015] 1. The timing of this utility model is to insert it into the required position before the ground is poured and solidified, and pull it out after initial setting; by cooperating with the expansion joint forming plate and the corner protector, it can not only avoid the formation of uneven gaps due to edge chipping, but also ensure the straightness, depth and width of the expansion joint, so as to achieve the characteristics of no cleaning and good aesthetics.

[0016] 2. This utility model uses a corrosion-resistant metal material (preferably stainless steel), which is rust-free and easy to clean. Furthermore, by utilizing the corrosion-resistant and smooth surface of stainless steel, the cut of the expansion joint can be made flat and smooth, which lays the foundation for the utility model to be reusable. Compared with the pre-embedded method, it has the characteristics of being reusable and reducing construction costs.

[0017] 3. This utility model, by setting a V-shaped inclined plate, facilitates subsequent grouting construction after the utility model is removed, and avoids wasting construction materials; furthermore, the construction process of this utility model can reduce the risk of concrete cracking, and expansion joints can be constructed directly after pouring, without waiting for the concrete to reach its strength, and the expansion joints are completed when the concrete initially sets.

[0018] 4. By providing a handle, this utility model can be easily pulled out after the concrete has initially set. Furthermore, by designing the handle as an arc-shaped structure, the strength of this utility model can be improved, thereby increasing its service life while ensuring the flatness and aesthetics of the expansion joint. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a bottom view of the structure of this utility model.

[0022] Figure 3 This is a top view of the structure of this utility model.

[0023] In the picture: 1. Expansion joint forming plate; 2. Corner guard plate; 3. Sloping plate; 4. Handle piece. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0025] The following is in conjunction with the appendix Figure 1-3This application provides a further detailed description of an expansion joint forming tool used in concrete roads. The expansion joint forming tool includes an expansion joint forming plate 1, and the top of the expansion joint forming plate 1 is provided with a corner protector for protecting the angle between the concrete road and the expansion joint. This utility model is mainly used for expansion joint construction in cast-in-place concrete roads. It is inserted into the desired position before the concrete has fully hardened, and then removed after initial setting. Preferably, a release agent is applied to the outer surface before use to facilitate removal and surface cleaning. The expansion joint forming plate 1 has a fixed height and thickness after manufacturing. The corner protectors protect the angle between the concrete road and the expansion joint (preventing edge chipping) and position the expansion joint forming plate 1. This structure ensures the straightness, depth, and width of the expansion joint after construction. Furthermore, compared to the pre-embedded method, this utility model eliminates the need for pre-embedding, does not affect ground leveling, and requires no subsequent manual cleaning or removal of the pre-embedded material. Compared to the cutting method, it overcomes the problems of difficult timing control (too early may result in edge chipping, too late may lead to natural cracks) and dust and noise pollution during cutting. Overall, it has the advantages of convenient construction, easy operation, and good aesthetics.

[0026] Preferably, the expansion joint forming plate 1 is made of a corrosion-resistant metal material. Metal materials are characterized by high hardness and resistance to corrosion, which lays the foundation for repeated use.

[0027] Preferably, the expansion joint forming plate 1 is made of stainless steel. Stainless steel has a smooth surface, and when used with a release agent, it is easy to remove and clean. It can be reused after cleaning, eliminating the need for pre-embedding, preventing cracks, and facilitating subsequent grouting. This invention utilizes the non-smoothness, high strength, and rust resistance of stainless steel to ensure a smooth, aesthetically pleasing, and reusable expansion joint cut. Specifically, the height of the expansion joint forming plate 1 can be determined according to actual conditions, and its thickness is generally 6mm.

[0028] Preferably, the corner protector includes at least a corner protector plate 2 connected to the top of the expansion joint forming plate 1 and arranged parallel to the concrete road. In actual use, the lower surface of the corner protector plate 2 in this invention contacts the top of the concrete, which not only protects the angle between the concrete road and the expansion joint but also positions the expansion joint forming plate 1.

[0029] Preferably, the corner protector further includes a V-shaped inclined plate 3 disposed on the top of the expansion joint forming plate 1, and corner protector plates 2 disposed on the outer side of the top of the inclined plate 3, which are parallel to the concrete road. This invention, by setting the V-shaped inclined plate 3, can form a V-shaped groove after the expansion joint is formed, which can better guide stress concentration at the joint opening, reduce the risk of cracks deepening, and facilitate subsequent sealant filling and maintenance. This achieves the advantages of avoiding quality problems, eliminating environmental hazards, significantly extending the service life of concrete roads, and reducing maintenance costs.

[0030] Preferably, the top of the corner guard 2 is provided with a handle 4 for lifting the expansion joint forming plate 1 out of the concrete. By providing the handle 4, it is convenient to remove this utility model from the concrete after construction.

[0031] Preferably, the handle 4 is an arc-shaped structure, with one end connected to one side of the corner guard 2 and the other end connected to the other side of the corner guard 2. When the arc-shaped structure (preferably a semi-circular structure) of this invention is used as the handle 4, it facilitates the removal of the invention from the concrete and also improves the strength of the V-shaped inclined plate 3, preventing deformation due to compressive shrinkage, thereby extending its service life.

[0032] Preferably, the expansion joint forming plate 1, the inclined plate 3, the corner guard plate 2, and the handle 4 are made of the same material and are an integral structure.

[0033] The working principle of this utility model is as follows: On one hand, concrete is poured to form the road; on the other hand, a release agent is applied to the surface of the expansion joint forming plate 1, the outer side of the inclined plate 3, and the lower surface of the corner guard plate 2. Before the ground concrete has solidified, the operator holds the handle 4 and inserts the expansion joint forming plate 1 into the desired position (until the lower surface of the corner guard plate 2 contacts the upper surface of the concrete road). After initial setting, the operator holds the handle 4 and pulls the expansion joint forming plate 1 out. After removal, the surface of the expansion joint forming plate 1, the outer side of the inclined plate 3, and the lower surface of the corner guard plate 2 can be cleaned for repeated use. No pre-embedding is required, preventing cracks and facilitating subsequent grouting. Using this utility model for expansion joint forming construction offers advantages such as convenient operation, a smooth and aesthetically pleasing expansion joint after construction, guaranteed grouting quality without edge chipping, and reusability, thus reducing construction costs.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A tool for forming expansion joints in concrete roads, characterized in that: The expansion joint forming tool includes an expansion joint forming plate (1), and the top of the expansion joint forming plate (1) is provided with a corner guard for protecting the angle between the concrete road and the expansion joint; The corner guard includes at least a corner guard plate (2) that is connected to the top of the expansion joint forming plate (1) and is arranged parallel to the concrete road.

2. The expansion joint forming tool for use in concrete roads according to claim 1, characterized in that: The expansion joint forming plate (1) is made of corrosion-resistant metal.

3. The expansion joint forming tool for use in concrete roads according to claim 2, characterized in that: The expansion joint forming plate (1) is made of stainless steel.

4. The expansion joint forming tool for use in concrete roads according to claim 1, characterized in that: The corner guard also includes a V-shaped inclined plate (3) set on the top of the expansion joint forming plate (1), and corner guards (2) set on the outer side of the top of the inclined plate (3) and parallel to the concrete road.

5. The expansion joint forming tool for use in concrete roads according to claim 4, characterized in that: The corner guard (2) is provided with a handle (4) at the top for lifting the expansion joint forming plate (1) out of the concrete.

6. The expansion joint forming tool for use in concrete roads according to claim 5, characterized in that: The handle (4) is an arc-shaped structure. One end of the arc-shaped structure is connected to the corner guard (2) on one side, and the other end of the arc-shaped structure is connected to the corner guard (2) on the other side.

7. A tool for forming expansion joints in concrete roads according to claim 4 or 5, characterized in that: The expansion joint forming plate (1), inclined plate (3), corner guard plate (2) and handle (4) are made of the same material and are an integral structure.

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