Expansion joint structure of concrete pavement

Abstract

This utility model relates to the field of concrete pavement technology and discloses a concrete pavement expansion joint structure, including concrete as the main structural body for supporting and fixing the internal structure; a corrugated pipe with its outer wall disposed inside the concrete for conduction; a dowel bar with its outer wall slidably connected inside the corrugated pipe, the outer wall of the dowel bar being coated to replace the asphalt layer and reduce wear; and a sensing component disposed inside the concrete for real-time monitoring of the internal structure. In this utility model, the concrete pavement expansion joint structure replaces traditional materials with corrugated pipes and closed-cell rubber buffer columns, and adopts a dual waterproof and intelligent monitoring design, solving the problems of short lifespan due to material aging, cracking due to high resistance of the dowel bar, damage from water accumulation and freeze-thaw cycles, and delayed early warning in traditional expansion joints, thus improving durability, stability, and intelligent monitoring capabilities.

Description

Technical Field

[0001] This utility model relates to the field of concrete pavement technology, and in particular to the structure of expansion joints in concrete pavement. Background Technology

[0002] In the field of road engineering, concrete pavement expansion joints are a key structure for ensuring the stability and performance of pavement structures. With increasing traffic volume and complex and variable environmental conditions (frequent occurrences of heavy traffic, freeze-thaw cycles, and salt corrosion), the demand for the durability, stability, and intelligent monitoring of expansion joints is becoming increasingly urgent. Traditional concrete pavement expansion joints have long been limited by material properties and structural design, making it difficult to adapt to complex working conditions. Therefore, upgrading their technology has become an important direction for improving the quality of road engineering and the efficiency of operation and maintenance. This concrete pavement expansion joint structure was developed against this background.

[0003] In existing technologies, concrete pavement expansion joints often use PVC pipes as components, leveraging their flexibility to adapt to pavement expansion and contraction. Organic buffer materials are used for filling, relying on the material's own deformation to buffer stress. The dowel bars are coated with asphalt, utilizing the lubricity of asphalt to assist their sliding. Sealing and waterproofing largely depend on a single sealant, blocking water penetration by filling gaps. Regular manual inspections or conventional testing methods are used to assess the expansion joint's working condition. While these technologies supported the function of expansion joints for a period, as road use time increases and environmental conditions worsen, numerous drawbacks have gradually become apparent.

[0004] However, existing technologies have significant drawbacks. Traditional expansion joints suffer from short structural lifespans (typically less than 10 years) due to the aging of PVC pipes and organic buffer materials. Material aging causes the performance of expansion joints to continuously deteriorate, making them unable to effectively cope with long-term road expansion and contraction and load impacts. This not only increases the frequency and cost of road maintenance but also easily triggers a chain reaction of road damage, such as reduced road surface smoothness and driving comfort due to expansion joint failure, and even threatens the safety of the road structure, making it difficult to meet the long-term stable service requirements of modern road engineering.

[0005] Therefore, this application proposes a concrete pavement expansion joint structure to solve the above problems. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a concrete pavement expansion joint structure, which aims to solve the problems of short lifespan due to material aging, cracking due to high resistance of dowel bars, damage from water accumulation and freeze-thaw cycles, and delayed early warning in the existing technology.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A concrete pavement expansion joint structure includes concrete, which forms the main structural element and is used to support and fix the internal structure.

[0009] A corrugated pipe, the outer wall of which is disposed inside the concrete for conduction;

[0010] A force transmission rod, the outer wall of which is slidably connected to the inside of the bellows, and the outer wall of the force transmission rod is provided with a coating to replace the asphalt layer and reduce wear;

[0011] A sensing component is installed inside the concrete for real-time monitoring of the interior.

[0012] As a further description of the above technical solution:

[0013] The concrete has multiple bottom water channels inside, and SMP sealant is applied to the top of the concrete.

[0014] As a further description of the above technical solution:

[0015] The SMP sealant is placed on top of the bottom water channel, and the cooperation between the bottom water channel and the SMP sealant provides double waterproofing.

[0016] As a further description of the above technical solution:

[0017] A closed-cell rubber buffer post is provided on one side of the force transmission rod to buffer and prevent hard contact that could cause damage.

[0018] As a further description of the above technical solution:

[0019] The sensing component includes a pre-embedded strain sensor one, a pre-embedded strain sensor two, and a pre-embedded strain sensor three. The outer wall of the pre-embedded strain sensor one is fixedly connected to the inside of the bottom water guide channel.

[0020] As a further description of the above technical solution:

[0021] The outer wall of the second pre-embedded strain sensor is fixedly connected to the inside of the corrugated pipe, and the outer wall of the third pre-embedded strain sensor is fixedly connected to the inside of the closed-cell rubber buffer column.

[0022] This utility model has the following beneficial effects:

[0023] In this utility model, the concrete pavement expansion joint structure replaces traditional materials such as corrugated pipes and closed-cell rubber buffer columns. It adopts a dual waterproof and intelligent monitoring design, which solves the problems of traditional expansion joints such as short life due to material aging, cracking due to high resistance of dowel bars, damage from water accumulation and freeze-thaw cycles, and delayed early warning. It improves durability, stability and intelligent monitoring capabilities. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the concrete pavement expansion joint structure proposed in this utility model.

[0025] Figure 2 This is a schematic diagram of the corrugated pipe structure of the concrete pavement expansion joint structure proposed in this utility model.

[0026] Legend:

[0027] 1. Closed-cell rubber buffer column; 2. Coating; 3. Bottom water guide channel; 4. Force transmission rod; 5. SMP sealant; 6. Corrugated pipe; 7. Embedded strain sensor one; 8. Embedded strain sensor two; 9. Embedded strain sensor three; 10. Concrete. Detailed Implementation

[0028] 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 protection scope of the present utility model.

[0029] Reference Figure 1 and Figure 2 This utility model provides an embodiment of a concrete pavement expansion joint structure, including concrete 10, which is the main structural body used to support and fix the internal structure. It is made of reinforced concrete with a strength grade of C30 or above. With the good compressive strength and bearing capacity of concrete, it provides stable support for the entire internal structure of the spray booth. It can effectively support the weight of the spraying equipment, the parts to be sprayed and related auxiliary facilities, and ensure the long-term stable operation of the spray booth. It is used to support and fix various internal structures and is the basic carrier for the stable operation of the spray booth.

[0030] The corrugated pipe 6, with its outer wall set inside the concrete 10, is used for heat conduction. It is made of HDPE (high-density polyethylene), and its outer wall is cast inside the concrete 10. HDPE material possesses excellent flexibility and corrosion resistance. When the concrete 10 expands and contracts with the road surface or other structures, the corrugated pipe 6 can adapt and transmit the movement of the internal force transmission rod 4 through the stretching and compression of its corrugated structure. This provides sliding space for the force transmission rod 4, effectively adapting to the expansion and contraction deformation of the surrounding road surface or structure due to temperature, load, etc., and preventing structural damage due to stress concentration.

[0031] The force transmission rod 4 is slidably connected to the inside of the bellows 6. The outer wall of the force transmission rod 4 is provided with a coating 2 to replace the asphalt layer and reduce wear. The coating 2 is a PTFE polytetrafluoroethylene coating 2, which replaces the traditional asphalt layer. The PTFE coating 2 has an extremely low coefficient of friction and excellent wear resistance. When the force transmission rod 4 slides along the inside of the bellows 6, it can greatly reduce the wear between the force transmission rod 4 and the bellows 6, extend the service life of the force transmission rod 4 and the bellows 6, and at the same time reduce the sliding resistance, ensuring that the stress can be smoothly transmitted when the structure is deformed.

[0032] The sensing component is installed inside the concrete 10 for real-time monitoring of the interior.

[0033] Multiple bottom water guide grooves 3 are provided inside the concrete 10, and SMP sealant 5 is provided on the top of the concrete 10. The SMP sealant 5 is placed on the top of the bottom water guide grooves 3. Double waterproofing is achieved through the cooperation between the bottom water guide grooves 3 and the SMP sealant 5. The SMP sealant 5 is a polymer sealing material with excellent elasticity and adhesion, and it is placed on the top of the bottom water guide grooves 3. The bottom water channel 3 collects water, and SMP sealant 5 seals the gaps to prevent further water penetration. The combination of these two methods provides double waterproofing, effectively preventing problems such as equipment corrosion and reduced coating quality of parts caused by water accumulation inside the spray booth. A closed-cell rubber buffer column 1 is installed on one side of the force transmission rod 4 to buffer against damage caused by hard contact. The sensing components include pre-embedded strain sensor 1 7, pre-embedded strain sensor 2 8, and pre-embedded strain sensor 3 9. The outer wall of pre-embedded strain sensor 1 7 is fixedly connected to the inside of the bottom water channel 3, the outer wall of pre-embedded strain sensor 2 8 is fixedly connected to the inside of the corrugated pipe 6, and the outer wall of pre-embedded strain sensor 3 9 is fixedly connected to the inside of the closed-cell rubber buffer column 1. Through the coordinated work of these three types of sensors, intelligent monitoring of the expansion joints and key internal structures of the spray booth is achieved, facilitating timely detection of structural anomalies, early warning and maintenance, and ensuring the long-term stable operation of the spray booth.

[0034] Working principle: The dowel bar 4 bears the stress transmission during road expansion and contraction, allowing relative displacement of the concrete slabs on both sides to avoid stress concentration. The corrugated pipe 6 provides movement space for the dowel bar 4 to adapt to road expansion and contraction deformation, while protecting the dowel bar 4. The closed-cell rubber buffer column 1 plays a buffering role, absorbing and releasing energy during road deformation to reduce structural impact. The SMP sealant 5 and the bottom water guide channel 3 form a double waterproof system. The SMP sealant 5 seals the joint opening to prevent water from entering, while the bottom water guide channel 3 collects and drains the seeping water to prevent water accumulation and freeze-thaw damage. The pre-embedded strain sensor 1 7, pre-embedded strain sensor 2 8, and pre-embedded strain sensor 3 9 monitor the expansion joint strain data in real time, provide feedback on the working status, realize intelligent early warning, ensure the stable and long-term operation of the expansion joint, and solve the problems of easy aging and failure of traditional expansion joints.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A concrete pavement joint structure, characterized by, include: Concrete (10), which is the main structural component and is used to support and fix the internal structure; A corrugated pipe (6) has its outer wall disposed inside the concrete (10) for conduction. The force transmission rod (4) is slidably connected to the inside of the bellows (6) on its outer wall. The outer wall of the force transmission rod (4) is provided with a coating (2) to replace the asphalt layer and reduce wear. A sensing component is disposed inside the concrete (10) for real-time monitoring of the interior.

2. The concrete pavement joint structure according to claim 1, characterized in that: Multiple bottom water guide grooves (3) are provided inside the concrete (10), and SMP sealant (5) is provided on the top of the concrete (10).

3. The concrete pavement joint structure according to claim 2, wherein: The SMP sealant (5) is placed on top of the bottom water channel (3), and double waterproofing is achieved through the cooperation between the bottom water channel (3) and the SMP sealant (5).

4. The concrete pavement joint structure of claim 1, wherein: A closed-cell rubber buffer column (1) is provided on one side of the force transmission rod (4) to buffer and avoid hard contact that could cause damage.

5. The concrete pavement joint structure of claim 1, wherein: The sensing components include a pre-embedded strain sensor 1 (7), a pre-embedded strain sensor 2 (8), and a pre-embedded strain sensor 3 (9). The outer wall of the pre-embedded strain sensor 1 (7) is fixedly connected to the inside of the bottom water guide channel (3).

6. The concrete pavement joint structure according to claim 5, wherein: The outer wall of the second embedded strain sensor (8) is fixedly connected to the inside of the corrugated pipe (6), and the outer wall of the third embedded strain sensor (9) is fixedly connected to the inside of the closed-cell rubber buffer column (1).

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