Asphalt road structure at joint of top plate and non-top plate of basement

Abstract

The utility model relates to the technical field of road engineering, and particularly discloses an asphalt road structure at the joint of a basement roof and a non-roof, which comprises a stable base layer, a shear-resistant layer, permeable asphalt, a bearing layer, adhesive asphalt, a pavement particle layer, a first force transfer layer and a second force transfer layer. According to the utility model, through the arrangement of the anti-shearing layer and the steps on the anti-shearing layer and the matching use of the first force transmission layer, the second force transmission layer and the force transmission rods, the anti-shearing capability and the load transmission capability of the road structure at the joint of the basement roof and the non-roof are effectively enhanced. Therefore, road structure damage caused by differential settlement of the foundation or load change can be reduced, and the overall stability of the road is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of road engineering technology, specifically to an asphalt road structure at the junction of the basement roof slab and the non-roof slab. Background Technology

[0002] In the field of road engineering, especially in road construction involving the junction of basement roof slabs and non-roof slabs, a thorny problem often arises: cracks and fissures caused by uneven foundation settlement. This is particularly common in asphalt roads, where the width covers the junction between the basement roof area and the natural foundation pavement (non-roof area).

[0003] Specifically, the basement roof area is typically filled and reinforced with backfill soil to form a stable road foundation. However, the adjacent non-roof area, i.e., the natural foundation pavement, is built directly on natural soil, and its geological conditions and bearing capacity may differ significantly from the backfill soil. This inconsistency in materials on both sides can easily lead to uneven settlement of the foundation at the junction under the long-term effects of vehicle loads and natural environmental factors.

[0004] Uneven settlement can cause a series of problems, the most significant of which is cracking and fissures in asphalt pavements. These cracks not only affect the aesthetics and driving comfort of the road, but more importantly, they reduce the road's load-bearing capacity and durability, and may even threaten driving safety. Therefore, how to solve the problem of uneven settlement of asphalt pavement foundations at the junction of basement roof slabs and non-roof slabs has become an urgent technical challenge in the field of road engineering.

[0005] While existing technologies have proposed some solutions to this problem, they often suffer from drawbacks such as complex construction, high costs, or unsatisfactory results. Therefore, this invention aims to provide a more effective, economical, and easy-to-implement road structure and its construction method to completely solve the aforementioned quality problems. Utility Model Content

[0006] In order to overcome the problems existing in the prior art, the purpose of this utility model is to provide an asphalt road structure at the junction of the basement roof slab and the non-roof slab.

[0007] The technical solution adopted by this utility model to solve its technical problem is: an asphalt road structure at the junction of the basement roof slab and the non-roof slab, comprising:

[0008] Stabilized base course, shear layer, tack coat, load-bearing layer, tack coat, pavement granular layer, first load transfer layer, second load transfer layer;

[0009] The stabilized base course is positioned above the junction between the basement roof slab and the non-roof slab. The shear layer covers the upper surface of the stabilized base course and has steps parallel to the length of the asphalt road. The tack coat is overlaid on the upper surface of the shear layer, and the load-bearing layer covers the upper surface of the tack coat, with the upper surface of the load-bearing layer remaining horizontal. The first and second force transmission layers are respectively positioned on both sides of the shear layer, the tack coat, and the load-bearing layer. The first force transmission layer is positioned above the roof slab and has multiple sets of first force transmission rods arranged horizontally, with the first force transmission rods inserted into the steps. The second force transmission layer has multiple sets of second force transmission rods arranged horizontally, with the second force transmission rods inserted into the load-bearing layer. The tack coat covers the upper surface of the load-bearing layer, and the pavement particle layer covers the tack coat.

[0010] Main working principle: First, a stabilized base course is placed above the junction between the basement roof slab and the non-roof slab. The main function of this layer is to fill and support, ensuring the stability of the entire road structure's foundation and evenly distributing the weight and load of the structure above. A shear layer covers the upper surface of the stabilized base course, designed with steps parallel to the length of the asphalt road. The main function of the shear layer is to enhance the structure's shear resistance, preventing shear failure caused by uneven foundation settlement or load variations. The stepped design further increases the structure's stability and provides a foundation for the subsequent load-bearing layers. A tack coat covers the upper surface of the shear layer, its main function being to penetrate and bond to the underlying shear layer, forming a continuous and tight interface. This helps enhance the integrity and durability of the road structure. A load-bearing layer covers the upper surface of the tack coat, maintaining its upper surface level. The load-bearing layer is the main load-bearing layer of the road structure, capable of bearing vehicle and pedestrian loads and evenly transferring them to the underlying shear layer. The first and second load-bearing layers are respectively placed on either side of the shear layer, tack coat, and load-bearing layer. The first load-bearing layer is located above the top slab and features multiple sets of first load-bearing bars arranged horizontally, which are inserted into the steps of the shear layer. Similarly, the second load-bearing layer features multiple sets of second load-bearing bars arranged horizontally, which are inserted into the load-bearing layer. The main function of the load-bearing layers is to transfer and distribute loads, ensuring that the load is evenly and effectively transferred to the entire road structure, reducing damage caused by excessive local loads. The tack coat asphalt covers the upper surface of the load-bearing layer, primarily serving to bond and fix the overlying pavement granular layer. The pavement granular layer is the surface layer of the road structure, directly bearing the wear and impact from vehicles and pedestrians. This two-layer design helps enhance the road's wear resistance and skid resistance, improving driving safety and comfort.

[0011] In summary, the asphalt road structure at the junction of the basement roof slab and the non-roof slab ensures the stability and durability of the road structure through a reasonable layered design and force transmission mechanism. The close cooperation between each layer to jointly bear and distribute the load reduces the risk of damage caused by uneven foundation settlement or load variations.

[0012] Preferably, the first force transmission layer further includes a first sleeve, which is sleeved on one end of the first force transmission rod inserted into the shear layer.

[0013] The second force transmission layer also includes a second sleeve, which is fitted onto one end of the second force transmission rod that is inserted into the load-bearing layer.

[0014] Preferably, the first force transmission layer further includes a first filling groove and a first plain concrete layer;

[0015] The first plain concrete is disposed on the outside of the first force transmission layer, the first filling groove is disposed on the inside of the first force transmission layer, and the first filling groove is in contact with the shear layer; the first plain concrete layer is fixedly connected to one end of the first force transmission rod, and the other end of the first force transmission rod passes through the first filling groove and is inserted into the shear layer;

[0016] The second force transmission layer also includes a second filling groove and a second plain concrete layer;

[0017] The second plain concrete is disposed on the outside of the second force transmission layer, the second filling groove is disposed on the inside of the second force transmission layer, and the second filling groove is in contact with the load-bearing layer; the second plain concrete layer is fixedly connected to one end of the second force transmission rod, and the other end of the second force transmission rod passes through the second filling groove and is inserted into the load-bearing layer.

[0018] Preferably, asphalt-impregnated hemp fibers are provided in both the first filling groove and the second filling groove, and the asphalt-impregnated hemp fibers are placed under the first force transmission rod and the second force transmission rod.

[0019] Preferably, the first filling groove is further provided with a first foam rod, which is laid above the first force transmission rod along the length of the first filling groove.

[0020] The second filling groove is also provided with a second foam rod, which is laid above the second force transmission rod along the length of the second filling groove;

[0021] Both the first foam rod and the second foam rod are filled with polyurethane foam filler.

[0022] Preferably, the height of the step is not less than 100mm.

[0023] Preferably, the steps extend to the periphery of the top plate.

[0024] The construction method for the junction of the basement roof slab and the non-roof slab in an asphalt road structure based on any of the above-mentioned methods includes the following steps:

[0025] S1. Clean the top slab, carefully conduct soil quality testing, prepare for the backfilling of the stabilized base course, and spread the backfill in layers; begin backfilling until the area of ​​the stabilized base course above the top slab is level with the area not above the top slab.

[0026] S2. On both sides of the stable base, the position and height of the first force transmission layer and the second force transmission layer are determined by erecting formwork. One end of the first force transmission rod is fixed in the area of ​​the first force transmission layer, and one end of the second force transmission rod is fixed in the area of ​​the second force transmission layer. At the same time, asphalt hemp fiber is filled in the gap between the shear layer and the first and second force transmission layers. Then, plain concrete is used to pour the first and second force transmission layers respectively, and the first and second force transmission rods are fixed at the same time.

[0027] S3. A shear layer is created in the middle of the stable base layer, and gaps are formed between the shear layer and the first and second load transfer layers. Then, reinforced concrete is poured for the shear layer. During the pouring process, an additional step is laid in reinforced concrete in the area above the top slab where the shear layer is located. The step completely covers the protruding end of the first load transfer bar. At the same time, asphalt-impregnated hemp fiber is filled in the gaps between the shear layer and the first and second load transfer layers.

[0028] S4. Lay a tack coat of asphalt over the shear layer;

[0029] S5. A load-bearing layer is laid on top of the tack coat asphalt using medium-grained (AC-20) modified asphalt concrete, and this load-bearing layer is completely flush with the first and second load-bearing layers, and completely covers the protruding end of the second load-bearing rod.

[0030] S6. Lay a tack coat of asphalt on top of the load-bearing layer;

[0031] S7. Lay a pavement granular layer on top of the tack coat asphalt.

[0032] As a preferred embodiment, in S3, a first sleeve is fitted onto the extended end of the first force transmission rod, and a second sleeve is fitted onto the extended end of the second force transmission rod.

[0033] Preferably, in S3, a first foam rod is covered above the gap between the first force transmission rod and the first force transmission layer; and a second foam rod is covered above the gap between the second force transmission rod and the second force transmission layer.

[0034] Compared with the prior art, the beneficial effects of this utility model are:

[0035] This invention effectively enhances the shear resistance and load transfer capacity of the road structure at the junction of the basement roof slab and non-roof slab by setting up a shear-resistant layer and steps thereon, and by using the first and second force-transfer layers in conjunction with force-transfer rods. This helps reduce road structure damage caused by uneven foundation settlement or load changes, and significantly improves the overall stability of the road.

[0036] The first dowel bar is inserted into the step of the shear layer, and the second dowel bar is inserted into the load-bearing layer. This design allows the load to be distributed more evenly throughout the road structure. This helps reduce cracking and fissures caused by excessive local loads, improving the road's durability and service life. Furthermore, the tack coat, the prime coat, and the tight bonding between each layer create a continuous and compact road structure. This helps enhance the overall stiffness and load-bearing capacity of the road structure, improving its resistance to external loads and natural environmental factors. Moreover, the presence of the pavement granular layer, and the fixing effect of the tack coat on the pavement granular layer, makes the road surface smoother, more wear-resistant, and more skid-resistant. This helps improve driving safety and comfort, reducing traffic accidents caused by uneven or slippery road surfaces.

[0037] In summary, the asphalt road structure at the junction of the basement roof slab and the non-roof slab has significant benefits, including improved road stability, optimized load distribution, enhanced road integrity, and improved driving safety and comfort. These effects work together to give the road structure better performance and a longer service life in practical applications. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the asphalt road structure at the junction of the basement roof slab and the non-roof slab.

[0040] 1. Stabilized base course; 2. Shear layer; 20. Step; 3. Prime coat asphalt; 4. Load-bearing layer; 5. Tack coat asphalt; 6. Particle layer; 7. First load-bearing layer; 70. First dowel bar; 71. First sleeve; 72. First filling groove; 73. First plain concrete layer; 74. First foam rod; 8. Second load-bearing layer; 80. Second dowel bar; 81. Second sleeve; 82. Second filling groove; 83. Second plain concrete layer; 84. Second foam rod. Detailed Implementation

[0041] To better understand the above-mentioned objectives, features, and advantages of this utility model, it will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of this utility model; the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0042] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0043] Example 1

[0044] This embodiment discloses an asphalt road structure at the junction of the basement roof slab and the non-roof slab, such as... Figure 1As shown, the road structure includes a stabilized base course 1, a shear layer 2, a tack coat 3, a load-bearing layer 4, a primer coat 5, a pavement granular layer 6, a first load-bearing layer 7, and a second load-bearing layer 8. First, the stabilized base course 1 is placed above the junction between the basement roof slab and the non-roof slab. Its main function is to fill and support, ensuring the stability of the entire road structure's foundation and evenly distributing the weight and load of the structure above. The shear layer 2 covers the upper surface of the stabilized base course 1 and is designed with steps 20 parallel to the length of the asphalt pavement. The main function of the shear layer 2 is to enhance the structure's shear resistance and prevent shear failure caused by uneven foundation settlement or load variations. The steps 20 further increase the structure's stability and provide a foundation for the subsequent load-bearing layers. The tack coat 3 covers the upper surface of the shear layer 2, its main function being to penetrate and bond to the underlying shear layer 2, forming a continuous and tight interface. This helps enhance the overall integrity and durability of the road structure. The load-bearing layer 4 covers the upper surface of the tack coat 3 and maintains its upper surface level. The load-bearing layer 4 is the main load-bearing layer of the road structure, capable of withstanding vehicle and pedestrian loads and uniformly transferring them to the shear layer 2 below. The first load-transfer layer 7 and the second load-transfer layer 8 are respectively located on either side of the shear layer 2, the tack coat 3, and the load-bearing layer 4. The first load-transfer layer 7 is located above the top slab and has multiple sets of first load-transfer rods 70 arranged horizontally, which are inserted into the steps 20 of the shear layer 2. Similarly, the second load-transfer layer 8 has multiple sets of second load-transfer rods 80 arranged horizontally, which are inserted into the load-bearing layer 4. The main function of the load-transfer layers is to transfer and distribute the load, ensuring that the load is evenly and effectively transferred to the entire road structure, reducing damage caused by excessive local loads. The tack coat 5 covers the upper surface of the load-bearing layer 4, and its main function is to bond and fix the pavement particle layer 6 above. The pavement particle layer 6 is the surface layer of the road structure, directly bearing the wear and impact of vehicles and pedestrians. The design of these two layers helps to enhance the road's wear resistance and skid resistance, improving driving safety and comfort.

[0045] In summary, the asphalt road structure at the junction of the basement roof slab and the non-roof slab ensures the stability and durability of the road structure through a reasonable layered design and force transmission mechanism. The close cooperation between each layer to jointly bear and distribute the load reduces the risk of damage caused by uneven foundation settlement or load variations.

[0046] In some optional embodiments, a first sleeve 71 and a second sleeve 81 are respectively added to the first force transmission layer 7 and the second force transmission layer 8. These sleeves are fitted onto the end of the force transmission rod inserted into the shear layer 2, serving to fix and protect the force transmission rod, preventing the first force transmission rod 70 and the second force transmission rod 80 from being pulled apart during deformation in the concrete, thereby further enhancing the stability and durability of the road structure, and thus improving the overall stability and shear resistance of the road structure at the joint.

[0047] In some optional embodiments, a first filling groove 72, a first plain concrete layer 73, a second filling groove 82, and a second plain concrete layer 83 are respectively added to the first force transmission layer 7 and the second force transmission layer 8. The design of these filling grooves and plain concrete layers allows the dowel bars to better integrate with the load-bearing layer 4, improving force transmission efficiency. Simultaneously, the plain concrete layer also strengthens the connection between the dowel bars and the load-bearing layer 4, further enhancing the overall stability of the road structure.

[0048] In some optional embodiments, asphalt-impregnated hemp fibers are provided in both the first filling groove 72 and the second filling groove 82. The asphalt-impregnated hemp fibers are placed under the force transmission rod, which serves to waterproof, isolate, and buffer, preventing moisture and impurities from eroding and damaging the force transmission rod, while reducing friction and wear of the force transmission rod during the force transmission process.

[0049] In some optional embodiments, a first foam rod 74 and a second foam rod 84 are respectively added to the first filling groove 72 and the second filling groove 82, and polyurethane foam filler is filled on top of the foam rods. The design of these foam rods and filler serves to further fix the force transmission rods, enhance the connection between the force transmission layer and the load-bearing layer 4, and improve the overall stiffness and seismic performance of the road structure.

[0050] In some alternative embodiments, the height of step 20 is not less than 100 mm. This design ensures that step 20 plays an effective shear-resisting role in shear layer 2, while avoiding the adverse effects on road structure stability caused by step 20 being too high or too low.

[0051] In some alternative embodiments, step 20 extends along the perimeter of the top slab. This design allows step 20 to integrate better with the top slab, enhancing the overall integrity and stability of the road structure at the junction.

[0052] In summary, this specific embodiment, through multi-layered and multi-faceted structural design, significantly improves the stability and durability of the asphalt road structure at the junction of the basement roof slab and non-roof slab, reduces cracking and fissures caused by uneven foundation settlement or load variations, optimizes load distribution, and extends the road's service life. Simultaneously, these designs also enhance the road structure's seismic and waterproof performance, providing strong support for its application in practical engineering projects.

[0053] Example 2

[0054] The construction method for the asphalt road structure at the junction of the basement roof slab and the non-roof slab, as described in any of the above-mentioned methods, includes the following steps:

[0055] S1. Clean the top slab, carefully conduct soil quality testing, prepare for backfilling of the stabilized base course 1, and spread the backfill in layers; start backfilling until the area of ​​the stabilized base course 1 above the top slab is level with the area not above the top slab. The stabilized base course 1 is 20cm thick and contains 6% cement stone powder slag.

[0056] S2. On the stable base layer 1, the position and height of the first force transmission layer 7 and the second force transmission layer 8 on both sides are determined by erecting a formwork. One end of the first force transmission rod 70 is fixed in the area of ​​the first force transmission layer 7, and one end of the second force transmission rod 80 is fixed in the area of ​​the second force transmission layer 8. Then, plain concrete is used to pour the first force transmission layer 7 and the second force transmission layer 8 respectively, and the first force transmission rod 70 and the second force transmission rod 80 are fixed at the same time. The plain concrete is 200mm thick and has a strength of C30. The first force transmission rod 70 and the second force transmission rod 80 are plain round steel bars with a length of 500mm and a diameter of 12mm.

[0057] S3. A shear layer 2 is created in the middle of the stable base layer 1, and gaps are formed between the shear layer 2 and the first force transmission layer 7 and the second force transmission layer 8. Then, reinforced concrete is poured for the shear layer 2. During the pouring process, an additional step 20 is laid in the area of ​​the shear layer 2 above the top slab using reinforced concrete. The step 20 completely covers the protruding end of the first force transmission rod 70. At the same time, asphalt-impregnated hemp fiber is filled in the gaps between the shear layer 2 and the first force transmission layer 7 and the second force transmission layer 8.

[0058] S4. Lay a tack coat of asphalt 3 on top of the shear layer 2;

[0059] S5. A load-bearing layer 4 is laid on top of the tack coat asphalt 3 using medium-grained (AC-20) modified asphalt concrete. The load-bearing layer 4 is completely flush with the first force transmission layer 7 and the second force transmission layer 8, and completely covers the protruding end of the second force transmission rod 80. The first step is 100mm thick and half the length of the road; the second step is 200mm thick.

[0060] S6. Lay a tack coat asphalt 5 on top of the load-bearing layer 4;

[0061] S7. Lay the pavement granular layer 6 on top of the tack coat asphalt 5.

[0062] In some optional embodiments, in S3, a first sleeve 71 is fitted onto the protruding end of the first force transmission rod 70, and a second sleeve 81 is fitted onto the protruding end of the second force transmission rod 80.

[0063] In some alternative embodiments, in S3, a first foam rod 74 is covered above the gap between the first force transmission rod 70 and the first force transmission layer 7; and a second foam rod 84 is covered above the gap between the second force transmission rod 80 and the second force transmission layer 8.

[0064] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. An asphalt road structure at the junction of the basement roof slab and the non-roof slab, characterized in that, include: Stabilized base course, shear layer, tack coat, load-bearing layer, tack coat, pavement granular layer, first load transfer layer, second load transfer layer; The stabilized base course is positioned above the junction between the basement roof slab and the non-roof slab. The shear layer covers the upper surface of the stabilized base course and has steps parallel to the length of the asphalt road. The tack coat is overlaid on the upper surface of the shear layer, and the load-bearing layer covers the upper surface of the tack coat, with the upper surface of the load-bearing layer remaining horizontal. The first and second force transmission layers are respectively positioned on both sides of the shear layer, the tack coat, and the load-bearing layer. The first force transmission layer is positioned above the roof slab and has multiple sets of first force transmission rods arranged horizontally, with the first force transmission rods inserted into the steps. The second force transmission layer has multiple sets of second force transmission rods arranged horizontally, with the second force transmission rods inserted into the load-bearing layer. The tack coat covers the upper surface of the load-bearing layer, and the pavement particle layer covers the tack coat.

2. The asphalt road structure at the junction of the basement roof slab and the non-roof slab according to claim 1, characterized in that, The first force transmission layer also includes a first sleeve, which is sleeved on one end of the first force transmission rod that is inserted into the shear layer; The second force transmission layer also includes a second sleeve, which is sleeved on one end of the second force transmission rod that is inserted into the load-bearing layer.

3. The asphalt road structure at the junction of the basement roof slab and the non-roof slab according to claim 2, characterized in that, The first force transmission layer also includes a first filling groove and a first plain concrete layer; The first plain concrete is disposed on the outside of the first force transmission layer, the first filling groove is disposed on the inside of the first force transmission layer, and the first filling groove is in contact with the shear layer. The first plain concrete layer is fixedly connected to one end of the first force transmission rod, and the other end of the first force transmission rod passes through the first filling groove and is inserted into the shear layer. The second force transmission layer also includes a second filling groove and a second plain concrete layer; The second plain concrete is disposed on the outside of the second force transmission layer, the second filling groove is disposed on the inside of the second force transmission layer, and the second filling groove is in contact with the load-bearing layer; the second plain concrete layer is fixedly connected to one end of the second force transmission rod, and the other end of the second force transmission rod passes through the second filling groove and is inserted into the load-bearing layer.

4. The asphalt road structure at the junction of the basement roof slab and the non-roof slab according to claim 3, characterized in that, Both the first filling groove and the second filling groove are provided with asphalt-impregnated hemp fibers, which are placed under the first force transmission rod and the second force transmission rod.

5. The asphalt road structure at the junction of the basement roof slab and the non-roof slab according to claim 4, characterized in that, The first filling groove is also provided with a first foam rod, which is laid above the first force transmission rod along the length of the first filling groove. The second filling groove is also provided with a second foam rod, which is laid above the second force transmission rod along the length of the second filling groove; Both the first foam rod and the second foam rod are filled with polyurethane foam filler.

6. The asphalt road structure at the junction of the basement roof slab and the non-roof slab according to claim 5, characterized in that, The height of the step shall not be less than 100mm.

7. The asphalt road structure at the junction of the basement roof slab and the non-roof slab according to claim 5, characterized in that, The steps extend to the periphery of the top plate.

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