Asphalt pavement lap joint structure

Abstract

The asphalt pavement lap joint structure comprises an old asphalt layer and a new asphalt layer, the old asphalt layer is of a regular step structure, the regular step structure comprises a surface layer, an auxiliary layer and a bottom layer, a stabilizing groove is formed in the surface of the auxiliary layer, a drainage pipeline is fixedly installed on the side face of the bottom layer, and the drainage pipeline is connected with the new asphalt layer. A movably connected supporting rod is arranged in the drainage pipeline; the new asphalt layer is of an inverted stepped structure, the inverted stepped structure comprises a top layer, a middle layer and a bottom layer, and communicated Z-shaped connecting grooves are formed in the top layer and the middle layer. According to the asphalt pavement lap joint structure, the old asphalt layer is divided into the positive step structure, the new asphalt layer is divided into the negative step structure, and when the top layer of the new asphalt layer is laid on the top of the auxiliary layer, the limiting blocks are limited by the stabilizing grooves in the top surface of the auxiliary layer; meanwhile, the top layer and the auxiliary layer are fixed through fixed installation of the U-shaped laying net and the Z-shaped laying net in the limiting block, and the surface layer and the top layer are prevented from being split when being subjected to external force.

Description

Technical Field

[0001] The utility model relates to the technical field of roads, in particular to an asphalt pavement overlap structure. Background Art

[0002] Asphalt pavement refers to various types of pavement paved with road asphalt materials mixed into mineral materials. Asphalt binder improves the ability of paving aggregate to resist damage to the road surface caused by traffic and natural factors, making the road surface smooth, dust-free, impermeable, and durable. It is the most widely used high-grade pavement in road construction.

[0003] The asphalt structural layer of asphalt pavement itself belongs to the category of flexible pavement, but its base can also use rigid cement concrete or semi-rigid hydraulic materials in addition to flexible materials. In addition, cracks are common diseases of asphalt pavement, and there are many reasons for their occurrence, such as substandard asphalt quality, improper construction joint treatment, shrinkage cracks in semi-rigid base, etc. In order to reduce the occurrence of cracks, the type of asphalt that meets the requirements should be selected according to relevant requirements, and construction should be carried out in combination with the local climate conditions and road grades.

[0004] Asphalt roads will inevitably have road surface problems after long-term use. In the process of paving new and old roads, it is necessary to use the asphalt pavement splicing structure, which can maximize the connection between the new and old roads and ensure the stability of the road surface. However, most of the structures currently used use connection devices to enhance stability during the paving of new and old roads. This structure cannot guarantee continuous stability, and the connection part may also cause problems such as water accumulation, which will lead to the destruction of the roadbed. Therefore, the asphalt pavement overlap structure is proposed, which can drain the accumulated water while the upper and lower structures of the new and old asphalt pavements can also cope with the problem of thermal expansion and contraction. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an asphalt pavement overlap structure having the advantages of high flexibility and good stability, and solves the problems of low connection tightness and poor stability of the previous asphalt pavement overlap structure.

[0006] In order to achieve the above-mentioned purpose of high flexibility and good stability, the utility model provides the following technical solutions: an asphalt pavement overlap structure, including an old asphalt layer and a new asphalt layer, the old asphalt layer is divided into a positive step structure, the positive step structure includes a surface layer, an auxiliary layer and a bottom layer, the surface of the auxiliary layer is provided with a stabilizing groove, the side of the bottom layer is fixedly installed with a drainage pipe, and the interior of the drainage pipe is provided with a movably connected support rod; the new asphalt layer is divided into an anti-step structure, the anti-step structure includes a top layer, a middle layer and a bottom layer, the top layer and the middle layer are provided with a connected Z-shaped connecting groove, the interior of the Z-shaped connecting groove is provided with a fixedly installed Z-shaped laying net, the bottom of the top layer is provided with a limiting block, the interior of the limiting block is provided with a U-shaped laying groove, the interior of the U-shaped laying groove is provided with a U-shaped laying net, and the interior of the U-shaped laying net is provided with a fixedly installed fixing block.

[0007] Furthermore, a plurality of limiting slots are provided on the top of the bottom layer, a plurality of through holes vertically penetrating the bottom of the Z-shaped connecting groove are provided inside the middle layer, and a plurality of fixedly installed positioning pins are provided inside the through holes.

[0008] Furthermore, a plurality of drainage holes are provided on the top of the drainage pipe, and the side surface of the support rod is slidably connected to the inner wall of the drainage pipe.

[0009] Furthermore, the internal spaces of the Z-shaped connecting grooves inside the top layer and the middle layer are interconnected, and the Z-shaped laying net is evenly distributed inside the Z-shaped connecting groove along the direction of the Z-shaped connecting groove and fixedly installed on the upper and lower sides of the Z-shaped connecting groove.

[0010] Furthermore, the bottom of the limiting block is embedded in the interior of the stabilizing groove and fixedly mounted to the inner wall of the stabilizing groove, and the interior of the U-shaped laying groove and the interior of the Z-shaped connecting groove are interconnected.

[0011] Furthermore, the U-shaped laying net is evenly distributed along the inside of the U-shaped laying groove and fixedly installed with the inner wall of the U-shaped laying groove, and the top of the U-shaped laying net and the bottom of the Z-shaped laying net are fixedly installed.

[0012] Furthermore, the positioning pin vertically passes through the through hole, the bottom of the positioning pin is embedded in the limiting slot and fixedly installed with the limiting slot, and the positioning pin vertically passes through the Z-shaped laying net and is fixedly installed with the Z-shaped laying net.

[0013] Compared with the prior art, the utility model provides an asphalt pavement overlap structure, which has the following beneficial effects:

[0014] 1. The asphalt pavement overlap structure is achieved by dividing the old asphalt layer into a positive step structure and the new asphalt layer into a negative step structure. When the top layer of the new asphalt layer is laid on the top of the auxiliary layer, the top surface stabilizing groove of the auxiliary layer limits the limiting block. At the same time, the U-shaped laying net and the Z-shaped laying net inside the limiting block are fixedly installed to fix the top layer and the auxiliary layer to prevent the surface layer and the top layer from splitting when subjected to external pressure or when the asphalt expands and contracts with heat or cold.

[0015] 2. The asphalt pavement overlap structure has Z-shaped connecting grooves in the top layer and the middle layer. The Z-shaped paving net fixedly installed inside the Z-shaped connecting grooves fixes the top layer and the middle layer together. At the same time, the asphalt is adhered to each other. The positioning nails and the Z-shaped paving net are fixedly installed and embedded in the limiting slots inside the bottom layer, thereby fixing the middle layer and the bottom layer, further strengthening the fixation between the two.

[0016] 3. The asphalt pavement overlap structure, since the old asphalt layer and the new asphalt layer cannot be directly adhered by asphalt, isolation lines will be formed between the old and new asphalt layers. When there is water accumulation, the water will continue to flow down through the lines between the two. When it reaches the surface of the bottom layer, it enters the drainage pipe through the drainage hole on the top of the drainage pipe and flows out from both sides of the roadside through the drainage pipe. At the same time, the support rod forms a support inside the drainage pipe to prevent the drainage pipe from being crushed by excessive road pressure and causing road collapse. This solves the problem of low stability of the traditional asphalt pavement overlap structure and can also prevent water from penetrating into the roadbed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional cross-sectional view of the structure of the utility model;

[0018] Figure 2 This is a cross-sectional view of the structure of the utility model;

[0019] Figure 3 The utility model structure Figure 1 A magnified view of the structure in the middle.

[0020] In the figure: 1. old asphalt layer; 2. new asphalt layer; 3. positive step structure; 31. surface layer; 32. auxiliary layer; 33. bottom layer; 34. stabilizing groove; 35. drainage pipe; 36. support rod; 4. reverse step structure; 41. top layer; 42. middle layer; 43. bottom layer; 5. Z-shaped connecting groove; 6. Z-shaped laying net; 7. limiting block; 8. U-shaped laying groove; 9. U-shaped laying net; 10. fixing block; 11. limiting slot hole; 12. through hole; 13. positioning nail. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-3 In this embodiment, the asphalt pavement overlap structure includes an old asphalt layer 1 and a new asphalt layer 2. The old asphalt layer 1 is divided into a positive step structure 3, which includes a surface layer 31, an auxiliary layer 32 and a bottom layer 33. A stabilizing groove 34 is provided on the surface of the auxiliary layer 32. A drainage pipe 35 is fixedly installed on the side of the bottom layer 33. A movably connected support rod 36 is provided inside the drainage pipe 35. The new asphalt layer 2 is divided into an anti-step structure 4, which includes a top layer 41, a middle layer 42 and a bottom layer 43. A connected Z-shaped connecting groove 5 is provided inside the top layer 41 and the middle layer 42. A fixedly installed Z-shaped laying net 6 is provided inside the Z-shaped connecting groove 5. A limiting block 7 is provided at the bottom of the top layer 41. A U-shaped laying groove 8 is provided inside the limiting block 7. A U-shaped laying net 9 is provided inside the U-shaped laying groove 8. A fixedly installed fixing block 10 is provided inside the U-shaped laying net 9.

[0023] In this embodiment, a plurality of drainage holes are provided at the top of the drainage pipe 35, and the side surface of the support rod 36 is slidably connected to the inner wall of the drainage pipe 35, so that the accumulated water can be smoothly discharged from the pipe through the drainage pipe 35, and the support rod 36 is slidably connected inside the drainage pipe 35 to ensure the smooth outflow of water.

[0024] In this embodiment, the internal spaces of the Z-shaped connecting grooves 5 inside the top layer 41 and the middle layer 42 are interconnected, and the Z-shaped laying net 6 is evenly distributed inside the Z-shaped connecting grooves 5 along the direction of the Z-shaped connecting grooves 5 and fixedly installed on the upper and lower sides of the Z-shaped connecting grooves 5.

[0025] By providing the Z-shaped laying net 6 , various components inside the new asphalt layer 2 are fixed for a second time and connected and fixed to the old asphalt layer 1 at the same time.

[0026] In this embodiment, the bottom of the limiting block 7 is embedded in the interior of the stabilizing groove 34 and fixedly mounted to the inner wall of the stabilizing groove 34 , and the interior of the U-shaped laying groove 8 and the interior of the Z-shaped connecting groove 5 are interconnected.

[0027] The top layer 41 is embedded into the stabilizing groove 34 through the limiting block 7, so that the new asphalt layer 2 and the old asphalt layer 1 are preliminarily connected to prevent sliding.

[0028] In this embodiment, the U-shaped laying net 9 is evenly distributed along the inside of the U-shaped laying groove 8 and fixedly installed with the inner wall of the U-shaped laying groove 8, and the top of the U-shaped laying net 9 and the bottom of the Z-shaped laying net 6 are fixedly installed.

[0029] In this embodiment, a plurality of limiting slots 11 are provided at the top of the bottom layer 33, a plurality of through holes 12 vertically penetrating the bottom of the Z-shaped connecting groove 5 are provided inside the middle layer 42, and a plurality of fixedly installed locking pins 13 are provided inside the through holes 12.

[0030] The middle layer 42 and the bottom layer 33 are fixedly connected for a second time by providing the retaining pins 13 .

[0031] In this embodiment, the positioning pin 13 vertically passes through the through hole 12, the bottom of the positioning pin 13 is embedded in the limiting slot 11 and fixedly installed with the limiting slot 11, and the positioning pin 13 vertically passes through the Z-shaped laying net 6 and is fixedly installed with the Z-shaped laying net 6.

[0032] The working principle of the above embodiment is:

[0033] By dividing the old asphalt layer 1 into a positive step structure 3, and the new asphalt layer 2 into a negative step structure 4, when the top layer 41 of the new asphalt layer 2 is laid on the top of the auxiliary layer 32, the top surface stabilizing groove 34 of the auxiliary layer 32 limits the limiting block 7, and at the same time, the fixed installation of the U-shaped laying net 9 and the Z-shaped laying net 6 inside the limiting block 7 fixes the top layer 41 and the auxiliary layer 32 to prevent the surface layer 31 and the top layer 41 from splitting when subjected to external force.

[0034] In addition, by providing a Z-shaped connecting groove 5 in the top layer 41 and the middle layer 42, the Z-shaped paving net 6 fixedly installed inside the Z-shaped connecting groove 5 fixes the top layer 41 and the middle layer 42 together, and at the same time, the asphalts are adhered to each other, and the positioning nails 13 and the Z-shaped paving net 6 are fixedly installed while being embedded in the limiting slot holes 11 inside the bottom layer 33, thereby fixing the middle layer 42 and the bottom layer 33, thereby further strengthening the fixation between the two.

[0035] In addition, since the old asphalt layer 1 and the new asphalt layer 2 cannot be directly adhered to each other by asphalt, cracks are bound to appear on the contact surface between the two. When cracks appear and form lines, water continues to flow down through the cracks between the two. When it reaches the surface of the bottom layer 33, it enters the drainage pipe 35 through the drainage hole at the top of the drainage pipe 35, and flows out from both sides of the roadside through the drainage pipe 35. At the same time, the support rod 36 forms a support inside the drainage pipe 35 to prevent the drainage pipe 35 from being crushed by excessive road pressure, thereby causing road collapse.

[0036] The electrical components appearing in the article are all electrically connected to the main controller and the power supply. The main controller can be a conventional known device for control such as a computer, and the existing public power connection technology is not described in detail in the article.

[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0038] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. An asphalt pavement overlap structure, comprising an old asphalt layer (1) and a new asphalt layer (2), characterized in that: The old asphalt layer (1) is divided into a positive step structure (3), the positive step structure (3) includes a surface layer (31), an auxiliary layer (32) and a bottom layer (33), a stabilizing groove (34) is provided on the surface of the auxiliary layer (32), a drainage pipe (35) is fixedly installed on the side of the bottom layer (33), and a movably connected support rod (36) is provided inside the drainage pipe (35); The new asphalt layer (2) is divided into an anti-step structure (4), and the anti-step structure (4) includes a top layer (41), a middle layer (42) and a bottom layer (43). The top layer (41) and the middle layer (42) are provided with interconnected Z-shaped connecting grooves (5), and the Z-shaped connecting grooves (5) are provided with a fixedly installed Z-shaped laying net (6). The bottom of the top layer (41) is provided with a limiting block (7), and the limiting block (7) is provided with a U-shaped laying groove (8), and the U-shaped laying groove (8) is provided with a U-shaped laying net (9), and the U-shaped laying net (9) is provided with a fixedly installed fixing block (10).

2. The asphalt pavement overlap structure according to claim 1, characterized in that: The top of the bottom layer (33) is provided with a plurality of limiting slot holes (11), the interior of the middle layer (42) is provided with a plurality of through holes (12) vertically penetrating the bottom of the Z-shaped connecting groove (5), and the interior of the through holes (12) is provided with a plurality of fixedly installed positioning pins (13).

3. The asphalt pavement overlap structure according to claim 1, characterized in that: A plurality of drainage holes are provided on the top of the drainage pipe (35), and the side surface of the support rod (36) is slidably connected to the inner wall of the drainage pipe (35).

4. The asphalt pavement overlap structure according to claim 1, characterized in that: The internal spaces of the Z-shaped connecting grooves (5) inside the top layer (41) and the middle layer (42) are interconnected, and the Z-shaped laying net (6) is evenly distributed inside the Z-shaped connecting grooves (5) along the direction of the Z-shaped connecting grooves (5) and is fixedly installed on the upper and lower sides of the Z-shaped connecting grooves (5).

5. The asphalt pavement overlap structure according to claim 1, characterized in that: The bottom of the limiting block (7) is embedded in the interior of the stabilizing groove (34) and is fixedly mounted on the inner side wall of the stabilizing groove (34); the interior of the U-shaped laying groove (8) and the interior of the Z-shaped connecting groove (5) are interconnected.

6. The asphalt pavement overlap structure according to claim 1, characterized in that: The U-shaped laying net (9) is evenly distributed along the inside of the U-shaped laying groove (8) and is fixedly installed with the inner wall of the U-shaped laying groove (8). The top of the U-shaped laying net (9) and the bottom of the Z-shaped laying net (6) are fixedly installed.

7. The asphalt pavement overlap structure according to claim 2, characterized in that: The positioning pin (13) vertically penetrates the through hole (12), the bottom of the positioning pin (13) is embedded in the limiting slot hole (11) and is fixedly installed with the limiting slot hole (11), and the positioning pin (13) vertically penetrates the Z-shaped laying net (6) and is fixedly installed with the Z-shaped laying net (6).

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