Pavement joint structure
By adopting a pavement joint structure at the junction of asphalt reconstruction pavement and the original cement concrete pavement, the transition from flexibility to rigidity of the pavement is achieved, the problems of settlement and cracks at the junction are solved, and the road quality and driving safety are improved.
Patent Information
- Application Number
- CN202421771877.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-25
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-25
AI Technical Summary
Settlement and cracks will occur at the joints of asphalt reconstruction pavement and the original cement concrete pavement, affecting driving safety.
A pavement joint structure is adopted, including a surface layer transition structure and a base layer transition structure, which are connected in sequence from top to bottom. One side of the surface layer transition structure is connected to the cement pavement of the old road through a tie rod, and the other side is overlapped with the asphalt pavement surface layer by a multi-stage step structure. One side of the base layer transition section is connected to the old road soil base layer, and the other side is overlapped with the asphalt pavement base layer by a multi-stage step structure to realize the transition from flexible to rigidity of the pavement.
Effectively prevent asphalt pavement sinking caused by large stiffness differences on both sides of the joint, ensure the quality of the road at the joint, and facilitate driving safety and driving comfort.
Smart Images
Figure CN222796123U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technology of highway pavement structure, in particular to a pavement joint structure. Background Art
[0002] Cement concrete pavement has many joints, which may cause loud noise and easy to fall out, long construction and maintenance period, and difficult maintenance and repair, high overall cost and long time investment. Asphalt concrete pavement has the advantages of fast construction, convenient repair, smooth surface, no joints, low driving noise, and better driving comfort.
[0003] At present, when cement roads are damaged to a certain extent, the original road surface needs to be rebuilt, and asphalt road surface is generally used for reconstruction. Since cement road surface is a rigid structure and asphalt concrete road surface is a flexible structure, if two road surface structures with different stiffness are directly connected, the stiffness difference on both sides of the connection is large, and the asphalt concrete road surface with a flexible structure will appear concave and sink at the connection. If it is not treated for a long time, cracks will appear, affecting driving safety and driving comfort. Utility Model Content
[0004] The technical problem to be solved by the utility model is that settlement and cracks may occur at the junction of the asphalt reconstructed pavement and the original cement concrete pavement, which affects driving safety. The utility model aims to provide a pavement joint structure that transitions from flexibility to rigidity at the junction of the asphalt reconstructed pavement and the original cement concrete pavement, thereby ensuring the road quality at the junction and facilitating driving safety and driving comfort.
[0005] The utility model is realized by the following technical solutions:
[0006] A pavement joint structure comprises a surface layer transition structure and a base layer transition structure which are sequentially connected from top to bottom, wherein one side of the surface layer transition structure is connected to an old road cement pavement via a tie rod, and the other side is overlapped and connected to an asphalt pavement surface layer by a multi-step structure, and the bottom of the surface layer transition structure is provided with an inclined portion which gradually inclines upward from one side of the asphalt pavement, one side of the base layer transition section is connected to an old road soil base layer, and the other side is overlapped and connected to an asphalt pavement base layer by a multi-step structure, and the pavement transitions from flexible to rigid.
[0007] The utility model adopting the above scheme sets a surface transition structure and a base transition structure connected sequentially from top to bottom, and connects one side of the surface transition structure to the cement pavement of the old road through a pull rod, so as to ensure the strength and rigidity of the connection point between the asphalt pavement and the cement pavement, and overlaps the other side with the asphalt pavement surface layer using a multi-step structure, so that the pavement surface layer at the connection transitions from flexibility to rigidity. The bottom of the surface transition structure is also provided with an inclined portion that gradually tilts upward from one side of the asphalt pavement, so as to further achieve the transition of the pavement surface layer at the connection from flexibility to rigidity. The base transition section is also connected to the soil base of the old road on one side, and overlapped and connected to the asphalt pavement base on the other side using a multi-step structure, so that the connection points are mutually embedded and overlapped, the strength and rigidity of the connection points are improved, and the roadbed is transitioned from flexibility to rigidity. The asphalt reconstructed pavement and the original cement concrete pavement are transitioned from flexibility to rigidity as a whole at the junction of the asphalt reconstructed pavement and the original cement concrete pavement, so as to prevent the asphalt pavement from sinking due to the large difference in rigidity on both sides of the connection, ensure the road quality at the connection, and facilitate driving safety and driving comfort.
[0008] Preferably, the surface transition structure adopts a cement concrete transition plate, and a step is formed on the side of the cement concrete transition plate close to the asphalt pavement. The emulsified asphalt seal layer is laid on the step, and the emulsified asphalt seal layer has the same thickness as the emulsified asphalt seal layer at the same elevation of the asphalt pavement surface layer.
[0009] In this way, by forming a step on the side of the cement concrete transition plate close to the asphalt pavement and laying the emulsified asphalt seal layer on the step, it is convenient to improve the strength and rigidity of the connection between the emulsified asphalt seal layer and the cement concrete transition plate, prevent the generation of misalignment after long-term use, and make the emulsified asphalt seal layer and the asphalt pavement surface layer at the same elevation The thickness of the emulsified asphalt seal layer is the same, so that the connection is integrated with the asphalt pavement, ensuring the strength and rigidity of the connection.
[0010] Preferably, a modified asphalt concrete layer is laid on the top of the cement concrete transition plate, one side of the modified asphalt concrete layer is connected to the modified asphalt concrete layer of the asphalt pavement, and the other side of the modified asphalt concrete layer is connected to the cement pavement of the old road.
[0011] In this way, a modified asphalt concrete layer is laid on the top of the cement concrete transition plate, and one side of the modified asphalt concrete layer is connected to the modified asphalt concrete layer of the asphalt pavement, and the other side is connected to the old road cement pavement, so that the surface layer can achieve a transition from flexible to rigid.
[0012] Preferably, a layer of glass fiber grid is laid between the emulsified asphalt seal layer and the cement concrete transition plate, and a layer of glass fiber grid is laid between the modified asphalt concrete layer and the cement concrete transition plate.
[0013] In this way, by laying a layer of fiberglass grid between the emulsified asphalt seal layer and the cement concrete transition and between the modified asphalt concrete layer and the cement concrete transition plate, it is convenient to utilize the fiberglass grid's high tensile strength in both warp and weft directions and low elongation, as well as its excellent properties of high temperature resistance, low cold resistance, aging resistance, and corrosion resistance, thereby improving the road surface stability and enhancing the road bearing capacity.
[0014] Preferably, the inclined portion is located at the bottom of the cement concrete transition plate.
[0015] In this way, the inclined portion is located at the bottom of the cement concrete transition plate, achieving the transition of the road surface from flexibility to rigidity.
[0016] Preferably, the base transition structure adopts a soil base, a step is formed on one side of the soil base close to the asphalt roadbed, and the other side is connected to the soil base of the old road. A cement-stabilized gravel base is overlapped and laid on the top of the soil base. The cement-stabilized gravel base has the same thickness as the cement-stabilized gravel base at the same elevation as the asphalt pavement base.
[0017] In this way, a step is formed on one side of the soil base close to the asphalt roadbed, and the other side is connected to the soil base of the old road to form a whole. A cement-stabilized gravel base is overlapped and laid on the top of the soil base, and the cement-stabilized gravel base is overlapped and laid with the soil base, so that the roadbed transitions from flexible to rigid.
[0018] Preferably, a low-dose cement-stabilized gravel base layer is overlapped and paved on the steps, the thickness of the low-dose cement-stabilized gravel base layer is the same as the low-dose cement-stabilized gravel base layer at the same elevation as the asphalt pavement base layer, a gravel functional layer is arranged below the low-dose cement-stabilized gravel base layer, and the gravel functional layer is connected to the soil base layer.
[0019] In this way, by overlapping and paving a low-dose cement-stabilized gravel base on the steps, the strength and rigidity of the connection points are improved, and the thickness of the low-dose cement-stabilized gravel base is made the same as that of the low-dose cement-stabilized gravel base at the same elevation as the asphalt pavement base, so that it becomes one with the low-dose cement-stabilized gravel base at the same elevation as the asphalt pavement base, ensuring the connection strength.
[0020] Preferably, it also includes several tie rods and several force transmission rods, the longitudinal joints between the cement concrete transition plate and the cement pavement of the old road are connected by the force transmission rods, and the transverse joints formed between the cement concrete transition plates are connected by the tie rods.
[0021] In this way, the longitudinal joints between the cement concrete transition plate and the cement pavement of the old road are connected by the force transfer rod to prevent the pavement from breaking and cracking. The transverse joints formed between the cement concrete transition plates are also connected by the pull rods to disperse the load and prevent cracking at the transverse joints, thereby improving the quality and safety of the highway.
[0022] Preferably, both ends of the tie rod are respectively connected to the cement concrete transition plates on both sides of the transverse joint, an asphalt coating is provided in the middle of the tie rod, the asphalt coating is respectively located at the transverse joint and on both sides of the transverse joint, and the top of the transverse joint is filled with asphalt mastic.
[0023] In this way, by providing an asphalt coating in the middle of the tie rod and locating the asphalt coating at the transverse joint and on both sides of the transverse joint, the durability and corrosion resistance of the tie rod are enhanced, and the adhesion with concrete is enhanced. The top of the transverse joint is filled with asphalt mastic to prevent water and dust from entering the transverse joint.
[0024] Preferably, the force transmission rod includes an asphalt-coated section and a bare rod section, the asphalt-coated section is connected to the cement concrete transition plate layer, the longitudinal joint and the old road cement pavement near the longitudinal joint, the bare rod section is connected to the old road cement pavement, and the top of the longitudinal joint is filled with asphalt mastic.
[0025] In this way, by connecting the asphalt-coated section of the dowel rod to the cement concrete transition slab, the longitudinal joint and the old road cement pavement near the longitudinal joint, the asphalt coating enhances the durability and corrosion resistance of the dowel rod, enhances the adhesion with concrete, improves the connection strength between the dowel rod and the connection, and fills the top of the longitudinal joint with asphalt mastic to prevent water and dust from entering the longitudinal joint.
[0026] Compared with the prior art, the utility model has the following advantages and beneficial effects:
[0027] 1. Connect one side of the surface transition structure to the cement pavement of the old road through a tie rod to ensure the strength and rigidity of the connection point between the asphalt pavement and the cement pavement, and overlap and connect the other side to the asphalt pavement surface layer with a multi-step structure to make the pavement surface layer at the connection transition from flexible to rigid.
[0028] 2. The bottom of the surface transition structure is provided with an inclined portion which gradually slopes upward from one side of the asphalt pavement, so as to further achieve the transition of the pavement surface layer at the connection from flexible to rigid.
[0029] 3. Connect one side of the base transition section to the old road soil base, and the other side to the asphalt pavement base using a multi-step structure. Make the connection points overlap with each other to improve the strength and rigidity of the connection points and realize the transition of the roadbed from flexible to rigid.
[0030] 4. The junction between the asphalt reconstructed pavement and the original cement concrete pavement is transitioned from flexible to rigid as a whole to prevent the asphalt pavement from sinking due to the large difference in stiffness on both sides of the joint, ensure the road quality at the joint, and facilitate driving safety and comfort. BRIEF DESCRIPTION OF THE DRAWINGS
[0031] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:
[0032] Figure 1 It is a structural diagram of the utility model;
[0033] Figure 2 This is a schematic diagram of the utility model when the transmission pole is connected;
[0034] Figure 3 It is a schematic diagram of the pull rod connection in the utility model;
[0035] Figure 4 It is a schematic diagram of the construction joint connected by the pull rod and the force transfer rod of the utility model.
[0036] Marks and corresponding parts names in the attached drawings:
[0037] Modified asphalt concrete layer 10, emulsified asphalt seal layer 11, cement stabilized gravel base layer 12, low-dose cement stabilized gravel base layer 13, gravel functional layer 14, cement concrete transition plate 15, inclined portion 151, soil base layer 16, old road cement pavement 20, old road soil base layer 21, fiberglass grid 30, force transfer rod 40, asphalt coated section 41, bare rod section 42, tie rod 50, asphalt coating 51, transverse joint 60, longitudinal joint 70, asphalt mastic 80. DETAILED DESCRIPTION
[0038] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.
[0039] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any appropriate combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the diagrams provided herein are for illustrative purposes, and the diagrams are not necessarily drawn to scale. The term "and / or" used herein includes any and all combinations of one or more of the associated listed items.
[0040] In the description of the present invention, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They 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 direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the scope of protection of the present invention.
[0041] The terms "first", "second", etc. used in the present invention are only used to distinguish the corresponding components for the purpose of clarity of description, and are not intended to limit any order or emphasize importance, etc. In addition, the term "connected" used in this article can be directly connected or indirectly connected via other components without special explanation.
[0042] Example 1
[0043] This embodiment 1 provides a pavement joint structure, such as Figure 1-Figure 4 As shown, it includes a surface layer transition structure and a base layer transition structure connected in sequence from top to bottom, one side of the surface layer transition structure is connected to the old road cement pavement 20 through a pull rod 50, and the other side is overlapped and connected to the asphalt pavement surface layer by a multi-step structure, and the bottom of the surface layer transition structure is provided with an inclined portion 151 which gradually tilts upward from the asphalt pavement side, one side of the base layer transition section is connected to the old road soil base layer 21, and the other side is overlapped and connected to the asphalt pavement base layer by a multi-step structure, and the pavement at the junction of the new and old pavements transitions from flexible to rigid.
[0044] See also Figure 1The surface transition structure adopts a cement concrete transition plate 15, and a step is formed on the side of the cement concrete transition plate 15 close to the asphalt pavement. The emulsified asphalt seal layer 11 is laid on the step, and the emulsified asphalt seal layer 11 has the same thickness as the emulsified asphalt seal layer at the same elevation of the asphalt pavement surface layer. By setting the step, it is convenient to improve the strength and rigidity of the connection between the emulsified asphalt seal layer 11 and the cement concrete transition plate 15, prevent the generation of misalignment after long-term use, and make the emulsified asphalt seal layer 11 have the same thickness as the emulsified asphalt seal layer at the same elevation of the asphalt pavement surface layer, so that the connection is integrated with the asphalt pavement, ensuring the strength and rigidity of the connection.
[0045] See also Figure 1 A modified asphalt concrete layer 10 is laid on the top of the cement concrete transition plate 15. One side of the modified asphalt concrete layer 10 is connected to the modified asphalt concrete layer 10 of the asphalt pavement, and the other side is connected to the old road cement pavement 20, so that the surface layer can achieve a transition from flexible to rigid.
[0046] See also Figure 1 A layer of glass fiber grid 30 is laid between the emulsified asphalt seal layer 11 and the cement concrete transition plate 15, and a layer of glass fiber grid 30 is laid between the modified asphalt concrete layer 10 and the cement concrete transition plate 15. The glass fiber grid 30 has high tensile strength in both warp and weft directions and low elongation, as well as excellent properties such as high temperature resistance, low cold resistance, aging resistance, and corrosion resistance, so as to improve the road surface stability and enhance the road bearing capacity.
[0047] See also Figure 1 The inclined portion 151 is located at the bottom of the cement concrete transition plate 15 to achieve the transition of the road surface from flexible to rigid.
[0048] See also Figure 1 The base transition structure adopts a soil base 16, a step is formed on one side of the soil base 16 close to the asphalt roadbed, and the other side is connected to the old road soil base 21. A cement stabilized gravel base 12 is overlapped and laid on the top of the soil base 16. The cement stabilized gravel base 12 has the same thickness as the cement stabilized gravel base 12 at the same elevation as the asphalt pavement base. The cement stabilized gravel base 12 is overlapped and laid with the soil base 16, so that the roadbed forms a transition from flexible to rigid and from flexible to rigid.
[0049] See also Figure 1A low-dose cement-stabilized gravel base layer 13 is overlapped and laid on the step. The low-dose cement-stabilized gravel base layer 13 has the same thickness as the low-dose cement-stabilized gravel base layer at the same elevation as the asphalt pavement base layer. A gravel functional layer 14 is arranged below the low-dose cement-stabilized gravel base layer 13. The gravel functional layer 14 is connected to the soil base layer 16. The low-dose cement-stabilized gravel base layer 13 is integrated with the low-dose cement-stabilized gravel base layer at the same elevation as the asphalt pavement base layer to ensure the connection strength.
[0050] See also Figures 1 to 4 , and also includes several tie rods 50 and several force transmission rods 40. The longitudinal joints 70 between the cement concrete transition plate 15 and the old road cement pavement 20 are connected by the force transmission rods 40, and the transverse joints 60 formed between the cement concrete transition plates 15 and the cement concrete transition plates 15 are connected by the tie rods 50, so as to prevent the road surface from breaking and cracking, disperse the load, and prevent cracking at the transverse joints 60, thereby improving the quality and safety of the highway.
[0051] See also Figure 3 The two ends of the tie rod 50 are respectively connected to the cement concrete transition plates 15 on both sides of the transverse joint 60, and an asphalt coating 51 is provided in the middle of the tie rod 50. The asphalt coating 51 is respectively located at the transverse joint 60 and on both sides of the transverse joint 60, and the top of the transverse joint 60 is filled with asphalt mastic 80. In this way, the asphalt coating 51 is respectively located at the transverse joint 60 and on both sides of the transverse joint 60, which enhances the durability and corrosion resistance of the tie rod 50 and enhances the adhesion with concrete. The top of the transverse joint 60 is filled with asphalt mastic 80 to prevent water and dust from entering the transverse joint 60.
[0052] See also Figure 4 The dowel rod 40 includes an asphalt-coated section 41 and a bare rod section 42. The asphalt-coated section 41 is connected to the cement concrete transition plate 15 layers, the longitudinal joint 70 and the old road cement pavement 20 near the longitudinal joint 70. The bare rod section 42 is connected to the old road cement pavement 20. The top of the longitudinal joint 70 is filled with asphalt mastic 80. The asphalt-coated section 41 of the dowel rod 40 is connected to the cement concrete transition plate 15 layers, the longitudinal joint 70 and the old road cement pavement 20 near the longitudinal joint 70 to enhance the durability and corrosion resistance of the dowel rod 40 and enhance the adhesion with concrete. The top of the longitudinal joint 70 is filled with asphalt mastic 80 to prevent water and dust from entering the longitudinal joint 70.
[0053] During the specific construction, the surface layer of the old road cement pavement 20 is first broken and dug into a step-shaped structure. The height of the step should be the height of the new road structure layer, and the width of the base layer and the step should be 1.5 times the height. A 3m long transition section is set at the overlap between the new asphalt pavement surface layer and the old road cement pavement 20. The pavement of the transition section adopts two pavements in a stepped overlapping arrangement, and a thickened C30 cement concrete transition plate 15 is laid below, and a horizontal groove is set on the top surface of the cement concrete transition plate 15. In order to prevent reflective cracks from occurring on the road surface, a layer of glass fiber grid 30 is laid on the top surface of the cast-in-place concrete slab.
[0054] HPB300 round steel bar force transmission rods 40 with a diameter of 28 mm, a length of 60 cm and a spacing of 30 cm are arranged in the joints where the cement concrete transition plate 15 is connected to the old road cement pavement 20. The middle 10 cm is coated with an asphalt layer. HRB400 threaded steel bar tension rods 50 with a diameter of 14 mm, a length of 70 cm and a spacing of 60 cm are arranged in the longitudinal seams 70 in the cement concrete transition plate 15. The tensile strength of the glass fiber grid 30 is not less than 50 kN / m in both the longitudinal and transverse directions, and the elongation is not more than 4.0% in both the longitudinal and transverse directions.
[0055] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only the specific implementation method of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A pavement joint structure, characterized in that: It includes a surface layer transition structure and a base layer transition structure which are connected in sequence from top to bottom, wherein one side of the surface layer transition structure is connected to the cement pavement of the old road through a tie rod, and the other side is overlapped and connected to the surface layer of the asphalt pavement by a multi-step structure, and the bottom of the surface layer transition structure is provided with an inclined portion which gradually inclines upward from one side of the asphalt pavement, one side of the base layer transition section is connected to the soil base layer of the old road, and the other side is overlapped and connected to the base layer of the asphalt pavement by a multi-step structure, and the pavement transitions from flexible to rigid.
2. The pavement joint structure according to claim 1, characterized in that: The surface transition structure adopts a cement concrete transition plate, and a step is formed on the side of the cement concrete transition plate close to the asphalt pavement. The emulsified asphalt seal layer is laid on the step, and the emulsified asphalt seal layer has the same thickness as the emulsified asphalt seal layer at the same elevation of the asphalt pavement surface layer.
3. The pavement joint structure according to claim 2, characterized in that: A modified asphalt concrete layer is laid on the top of the cement concrete transition plate, one side of the modified asphalt concrete layer is connected to the modified asphalt concrete layer of the asphalt pavement, and the other side of the modified asphalt concrete layer is connected to the cement pavement of the old road.
4. The pavement joint structure according to claim 3, characterized in that: A layer of glass fiber grid is laid between the emulsified asphalt seal layer and the cement concrete transition plate, and a layer of glass fiber grid is laid between the modified asphalt concrete layer and the cement concrete transition plate.
5. The pavement joint structure according to claim 2, characterized in that: The inclined portion is located at the bottom of the cement concrete transition plate.
6. The pavement joint structure according to claim 1, characterized in that: The base transition structure adopts a soil base, a step is formed on one side of the soil base close to the asphalt roadbed, and the other side is connected to the soil base of the old road. A cement-stabilized gravel base is overlapped and laid on the top of the soil base. The cement-stabilized gravel base has the same thickness as the cement-stabilized gravel base at the same elevation as the asphalt pavement base.
7. The pavement joint structure according to claim 6, characterized in that: A low-dose cement-stabilized gravel base layer is overlapped and paved on the steps. The thickness of the low-dose cement-stabilized gravel base layer is the same as that of the low-dose cement-stabilized gravel base layer at the same elevation as the asphalt pavement base layer. A gravel functional layer is arranged below the low-dose cement-stabilized gravel base layer, and the gravel functional layer is connected to the soil base layer.
8. The pavement joint structure according to any one of claims 1 to 7, characterized in that: It also includes several tie rods and several force transmission rods. The longitudinal joints between the cement concrete transition plate and the cement pavement of the old road are connected through the force transmission rods, and the transverse joints formed between the cement concrete transition plates are connected through the tie rods.
9. The pavement joint structure according to claim 8, characterized in that: The two ends of the tie rod are respectively connected to the cement concrete transition plates on both sides of the transverse joint. An asphalt coating is provided in the middle of the tie rod. The asphalt coating is respectively located at the transverse joint and on both sides of the transverse joint. The top of the transverse joint is filled with asphalt mastic.
10. The pavement joint structure according to claim 8, characterized in that: The force transmission rod includes an asphalt-coated section and a bare rod section. The asphalt-coated section is connected to the cement concrete transition plate layer, the longitudinal joint and the old road cement pavement near the longitudinal joint. The bare rod section is connected to the old road cement pavement. The top of the longitudinal joint is filled with asphalt mastic.