Overlap structure and construction method of pavement joints
By using the overlap structure and construction method of virtual sharp-cut triangle zone in pavement technology, instead of traditional milling and excavation operations, the construction difficulty and pollution problems are solved, and a more efficient and environmentally friendly pavement joint laying is achieved. Reduce damage to the old path and material investment.
Patent Information
- Application Number
- CN202010274151.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-04-09
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2040-04-09
AI Technical Summary
In the existing pavement technology, milling and excavation operations lead to high construction difficulties, noise and dust pollution, and have great damage to the overall nature of the old road. In addition, crack-proof materials need to be laid at the junction of new and old roads, which increases investment. and construction complexity.
The base layer and surface layer of the new road structure are paved on the old road structure to form a virtual sharp-cut triangle area. By digging this area instead of planing and milling steps, the amount of milling and excavation is reduced, and the amount of milling and excavation is directly filled in the sharp-cut triangle area. The surface layer is smoothly overlapped, avoiding the use of planing and milling and crack-proof materials.
It reduces disturbances to the old road and construction complexity, reduces dust and noise pollution, simplifies the construction process, improves construction efficiency, and reduces investment in building materials.
Smart Images
Figure CN111335105B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a pavement overlap technology, and in particular to an overlap structure of a pavement joint and a construction method thereof. Background Art
[0002] With the renewal and upgrading of cities, rapid development of transportation, and the fact that the service life of the road surface is approaching its limit, more and more roads need to be comprehensively upgraded and renovated, and the supporting infrastructure has gradually changed from incremental to existing. Among them, road pavement paving and renovation minimize the damage to old roads, which can not only meet traffic functions but also enable rapid construction, highlighting green, environmental protection, and economical practicality.
[0003] In the prior art, at the intersection of the slope of the additional raised road surface and the boundary line of the old road surface engineering, the conventional joint design requires milling the original road surface, excavating steps on the base layer, and overlapping in layers. The cross-sectional schematic diagram is shown as follows: Figure 1 As shown, the new road structure usually includes a base layer 14, a cushion layer 13 and an asphalt surface layer 12. Steps are excavated by milling the old road structure 11, and then the layers are overlapped. This structure is difficult to construct. Excessive milling during construction will cause noise and dust; the excavation of the old road structure is likely to destroy the integrity of the base layer. Fiberglass grids need to be laid at the junction of the new and old road surfaces to prevent cracking. The construction of anti-cracking materials has high requirements for the flatness of the base layer and asphalt paving, and increases investment. Summary of the invention
[0004] The object of the present invention is to provide a lap joint structure of road surface joints which can reduce planing and excavation.
[0005] Another object of the present invention is to provide a method for constructing a lap joint structure of a road surface joint that can reduce planing, milling and excavation.
[0006] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.
[0007] According to one aspect of the present invention, there is provided an overlapping structure of a pavement joint, comprising a new road structure and an old road structure, wherein the pavement elevation of the new road structure is higher than that of the old road structure, and the pavements of the new road structure and the old road structure overlap smoothly, and the new road structure comprises: a base layer, wherein the base layer is spread on the old road structure, and the overlapping end of the base layer terminates at a first compacted thickness section, and a virtual pinch-out triangle area is formed between the first compacted thickness section and the upper surface of the old road structure; and a surface layer, wherein the surface layer is spread on the base layer, the surface layer fills the pinch-out triangle area, and the overlapping end of the surface layer and the old road structure extends into the old road structure, and the upper surface of the surface layer smoothly overlaps the upper surface of the old road structure.
[0008] In one embodiment, the height of the first compacted thickness section of the overlapping structure is 5 cm to 8 cm.
[0009] In one embodiment, the surface layer of the overlapping structure has a thickness of 3 cm to 5 cm.
[0010] In one embodiment, the base layer of the overlapping structure includes: a first base layer, which is spread on the old road structure, the overlapping end of the first base layer is terminated at a second compacted thickness section, and a virtual first pinch-out triangle area is formed between the second compacted thickness section and the upper surface of the old road structure; a second base layer, which is spread on the first base layer and fills the first pinch-out triangle area, the overlapping end of the base layer is terminated at the first compacted thickness section, and a virtual second pinch-out triangle area is formed between the first compacted thickness section and the upper surface of the old road structure; the surface layer is spread on the second base layer, and the surface layer fills the second pinch-out triangle area.
[0011] In one embodiment, the height of the second compacted thickness section of the overlapping structure is 10 cm to 13 cm.
[0012] According to another aspect of the present invention, a method for constructing an overlapping structure of a pavement joint is also provided, comprising the following steps: spreading a base layer on an old road structure to an overlapping end, the base layer forming a pinch-out triangle at the overlapping end, the pinch-out triangle being the portion of the base layer from the overlapping end to a first compacted thickness cross-section, excavating the pinch-out triangle portion after compacting the base layer, planing and milling a surface layer groove on the old road structure, spreading a surface layer on the base layer until it extends into the surface layer groove, ensuring that the surface layer fills the pinch-out triangle, and compacting the surface layer so that the upper surface of the surface layer smoothly overlaps with the upper surface of the old road structure.
[0013] In one embodiment, the height of the first compacted thickness section in the construction method is 5 cm to 8 cm.
[0014] In one embodiment, the thickness of the surface layer in the construction method is 3 cm to 5 cm.
[0015] In one embodiment, the base layer in the construction method includes: a first base layer, which is spread on the old road structure, and the first base layer forms a first pinch-out triangle area at the overlapping end, and the first pinch-out triangle area is the second compacted thickness cross-section portion from the overlapping end of the first base layer to the first base layer, and the first pinch-out triangle area is excavated after the construction of the first base layer is completed; a second base layer, which is spread on the first base layer and fills the first pinch-out triangle area, and the second base layer forms a second pinch-out triangle area at the overlapping end, and the second pinch-out triangle area is the first compacted thickness cross-section portion from the overlapping end of the second base layer and the old road structure to the second base layer, and the second pinch-out triangle area is excavated after the construction of the first base layer is completed, and the surface layer is spread on the second base layer, and the surface layer fills the second pinch-out triangle area.
[0016] In one embodiment, the height of the second compacted thickness section in the construction method is 10 cm to 13 cm.
[0017] The beneficial effect of the overlap structure embodiment of the present invention is that the structure of excavating the pinched-out triangular area is used to replace the step structure of the existing planing and milling old road structure, which reduces the amount of milling and excavation work compared to the prior art, thereby reducing the disturbance to the old road.
[0018] The beneficial effect of the embodiment of the overlap structure construction method of the present invention is that by excavating the pinch-out triangle area that is difficult to compact, the existing construction method of planing and milling the old road structure is replaced, while reducing the disturbance to the old road, there is no need to lay anti-cracking materials at the connection, thereby reducing the investment in anti-cracking materials and building materials. In addition, the construction process of this method is simple and fast, with less pollution and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.
[0020] The above features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.
[0021] Figure 1 It is a cross-sectional schematic diagram of the existing overlap structure;
[0022] Figure 2 It is a cross-sectional schematic diagram of an embodiment of the overlap structure of the present invention;
[0023] Figure 3 is a cross-sectional schematic diagram of another embodiment of the overlap structure of the present invention;
[0024] Figure 4 It is a schematic diagram of a process of an embodiment of a construction method of the present invention;
[0025] Among them: 11-old road structure; 12-asphalt; 13-cushion; 14-base layer; 21-old road structure; 22-new road structure; 23-surface layer; 23a-pinch-out triangle area; 24-base layer; a-surface layer thickness; b-first compacted thickness section; 31-old road structure; 32-second base layer; 33-first base layer; 32a-first pinch-out triangle area; 34a-second pinch-out triangle area; c-second compacted thickness section. DETAILED DESCRIPTION
[0026] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention in any way.
[0027] like Figure 2 As shown, an embodiment of the present invention discloses an overlapping structure of a pavement joint, comprising a new road structure 22 and an old road structure 21, wherein the pavement elevation of the new road structure 22 is higher than that of the old road structure 21, and the pavements of the new road structure 22 and the old road structure 21 overlap smoothly, and the new road structure 22 comprises a base layer 24 and a surface layer 23, wherein the base layer 24 is spread on the old road structure 21, and the base layer 24 forms a pinch-out triangle area 23a at the overlapping end, and the pinch-out triangle area 23a is the first compacted thickness section b portion from the overlapping end of the base layer 24 and the old road structure 21 to the base layer 24, and the pinch-out triangle area 23a is excavated after the construction of the base layer 24 is completed; the surface layer 23 is spread on the base layer 21, and the surface layer 23 fills the pinch-out triangle area 23a, and the overlapping end of the surface layer 23 and the old road structure 21 extends into the old road structure 21, and the upper surface of the surface layer 23 overlaps smoothly with the upper surface of the old road structure 21.
[0028] It should be noted that the pinch-out triangle area mentioned in this patent refers to the area where a layer gradually becomes thinner from a certain thickness until it disappears at the overlap end, such as Figure 2The pinch-out triangle area 23a in the middle is removed because the area is too thin to be compacted. The base layer 24 can be made of materials such as asphalt concrete, graded crushed stone, asphalt crushed stone, etc. Therefore, the height of the first compacted thickness section b can be 5cm to 8cm. In a possible embodiment, the height of the first compacted thickness section b can be 5cm, which can ensure that the base layer outside the pinch-out triangle area can be compacted. It is easy for those skilled in the art to understand that the height of the first compacted thickness section b can be adjusted according to the specific material and construction environment.
[0029] The surface layer thickness a is 3 cm to 5 cm. In a possible embodiment, the surface layer thickness a is 4 cm. The end of the surface layer 23 extends into the old road structure 21. Therefore, a surface layer groove with a depth of 4 cm needs to be milled on the old road structure 21. It is easy for those skilled in the art to understand that the surface layer thickness a can be adjusted according to specific construction requirements and construction environment.
[0030] In addition, it should be noted that the base layer described in this patent is a general term for the part below the surface layer, which can include concepts such as the base layer, cushion layer and even the lower layer in construction practice. When the base layer includes multiple layers, the overlap structure can also be Figure 3 As shown, for example, the base layer may include a first base layer 33 and a second base layer 32. The first base layer 33 is spread on the old road structure 31. The first base layer 33 forms a first pinch-out triangle area 32a at the overlapping end. The first pinch-out triangle area 32a is from the overlapping end of the first base layer 33 and the old road structure 31 to the second compacted thickness section c portion of the first base layer 33. The first pinch-out triangle area 32a is excavated after the construction of the first base layer 33 is completed; the second base layer 32 is spread on the first base layer 33 and fills the first pinch-out triangle area 32a. The second base layer 32 forms a second pinch-out triangle area 34a at the overlapping end. The second pinch-out triangle area 34a is from the overlapping end of the second base layer 32 and the old road structure 31 to the first compacted thickness b portion of the second base layer 32. The second pinch-out triangle area 34a is excavated after the construction of the first base layer 32 is completed. The surface layer 34 is spread on the second base layer 32 and fills the second pinch-out triangle area 34a.
[0031] In order to ensure the compaction of the first base layer 33, the height of the second compacted thickness section c may be 10 cm to 13 cm, and in a possible embodiment, 10 cm is selected, and the first pinch-out triangle area 32a with a thickness less than 10 cm that cannot be compacted is excavated.
[0032] The overlapping structure embodiment of the present invention adopts a structure for excavating a pinched-out triangle area to replace the step structure of the existing planing and milling old road structure. Compared with the prior art, the amount of milling and excavation work is reduced, thereby reducing the disturbance to the old road.
[0033] like Figure 4As shown, an embodiment of the present invention also discloses a method for constructing an overlapping structure of a pavement joint, comprising the following steps: spreading a base layer on the old road structure to the overlapping end, the base layer forming a pinch-out triangle area at the overlapping end, the pinch-out triangle area being the first compacted thickness portion from the overlapping end of the base layer and the old road structure to the base layer, and excavating the pinch-out triangle area after compacting the base layer; planing and milling a surface layer groove on the old road structure, spreading a surface layer on the base layer until it extends into the surface layer groove, ensuring that the surface layer fills the pinch-out triangle area, and compacting the surface layer so that the upper surface of the surface layer smoothly overlaps with the upper surface of the old road structure.
[0034] Compared with the prior art, the planing and milling of the old road structure in this method is only for the surface groove part, thereby reducing the planing and milling amount and the disturbance to the old road structure, and also reducing dust and noise pollution.
[0035] In a possible embodiment, the first compacted thickness is 5 cm.
[0036] In a possible embodiment, the surface layer may be asphalt, and the thickness of the surface layer is 4 cm.
[0037] In a possible embodiment, the base layer includes: a first base layer, which is spread on the old road structure, and the first base layer forms a first pinch-out triangle area at the overlapping end, and the first pinch-out triangle area is the second compacted thickness portion from the overlapping end of the first base layer and the old road structure to the first base layer, and the first pinch-out triangle area is excavated after the construction of the first base layer is completed; a second base layer, which is spread on the first base layer and fills the first pinch-out triangle area, and the second base layer forms a second pinch-out triangle area at the overlapping end, and the second pinch-out triangle area is the first compacted thickness portion from the overlapping end of the second base layer and the old road structure to the second base layer, and the second pinch-out triangle area is excavated after the construction of the first base layer is completed.
[0038] In a possible embodiment, the height of the second compacted thickness section is selected to be 10 cm.
[0039] The embodiment of the overlap structure construction method of the present invention replaces the existing planing and milling old road structure construction method by digging out the pinch-out triangle area that is difficult to compact, while reducing the disturbance to the old road, and there is no need to lay anti-cracking materials at the connection, thereby reducing the investment in anti-cracking materials and building materials. In addition, the construction process of this method is simple, fast, less polluting and highly efficient.
[0040] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.
[0041] Although the above methods are illustrated and described as a series of actions for simplicity of explanation, it should be understood and appreciated that these methods are not limited by the order of the actions, because according to one or more embodiments, some actions may occur in a different order and / or concurrently with other actions from those illustrated and described herein or not illustrated and described herein but understandable to those skilled in the art.
[0042] The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.
[0043] The above description is only a preferred example of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.
Claims
1. A pavement joint overlap structure, comprising a new road structure and an old road structure, wherein the pavement elevation of the new road structure is higher than that of the old road structure, and the pavements of the new road structure and the old road structure are smoothly overlapped, characterized in that: The new road structure comprises: A base layer, the base layer is spread on the old road structure, the overlapping end of the base layer is terminated at a first compacted thickness section, and a virtual pinch-out triangle area is formed between the first compacted thickness section and the upper surface of the old road structure; A surface layer is spread on the base layer, the surface layer fills the pinched-out triangle area, the overlapping end of the surface layer and the old road structure extends into the old road structure, and the upper surface of the surface layer overlaps the upper surface of the old road structure smoothly.
2. The pavement joint overlap structure according to claim 1, characterized in that: The height of the first compacted thickness section is 5 cm to 8 cm.
3. The pavement joint overlap structure according to claim 1, characterized in that: The thickness of the surface layer is 3cm to 5cm.
4. The lap joint structure of pavement joint according to claim 1, characterized in that: The base layer includes: A first base layer, wherein the first base layer is paved on the old road structure, the overlapping end of the first base layer is terminated at a second compacted thickness section, and a virtual first pinch-out triangle area is formed between the second compacted thickness section and the upper surface of the old road structure; A second base layer, the second base layer is spread on the first base layer and fills the first pinch-out triangle area, the overlapping end of the base layer terminates at the first compacted thickness section, and a virtual second pinch-out triangle area is formed between the first compacted thickness section and the upper surface of the old road structure; the surface layer is spread on the second base layer, and the surface layer fills the second pinch-out triangle area.
5. The pavement joint overlap structure according to claim 4, characterized in that: The height of the second compacted thickness section is 10 cm to 13 cm.
6. A method for constructing a lap joint structure of a pavement joint, characterized in that: The following steps are involved: The base layer is spread on the old road structure to the overlapping end, and the base layer forms a pinch-out triangle area at the overlapping end. The pinch-out triangle area is the section from the overlapping end of the base layer to the first compacted thickness. After compacting the base layer, the pinch-out triangle area is partially excavated, and a surface layer groove is planed and milled on the old road structure. The surface layer is spread on the base layer until it extends into the surface layer groove, ensuring that the surface layer fills the pinch-out triangle area. The surface layer is compacted so that the upper surface of the surface layer smoothly overlaps with the upper surface of the old road structure.
7. The method for constructing a pavement joint overlap structure according to claim 6, characterized in that: The height of the first compacted thickness section is 5 cm to 8 cm.
8. The method for constructing a lap joint structure of a pavement joint according to claim 6, characterized in that: The thickness of the surface layer is 3cm to 5cm.
9. The method for constructing a pavement joint overlap structure according to claim 6, characterized in that: The base layer includes: A first base layer, wherein the first base layer is paved on the old road structure, the first base layer forms a first pinch-out triangle area at the overlapping end, the first pinch-out triangle area is a second compacted thickness section portion from the overlapping end of the first base layer to the first base layer, and the first pinch-out triangle area is excavated after the construction of the first base layer is completed; The second base layer is spread on the first base layer and fills the first pinch-out triangle area. The second base layer forms a second pinch-out triangle area at the overlapping end. The second pinch-out triangle area is the first compacted thickness cross-section portion from the overlapping end of the second base layer and the old road structure to the second base layer. The second pinch-out triangle area is excavated after the construction of the first base layer is completed. The surface layer is spread on the second base layer, and the surface layer fills the second pinch-out triangle area.
10. The method for constructing a lap joint structure of a pavement joint according to claim 9, characterized in that: The height of the second compacted thickness section is 10 cm to 13 cm.