Water-stable paving longitudinal joint process and road

Abstract

The invention provides a water-stable paving longitudinal joint process and a road, and relates to the technical field of road construction. The water-stable paving longitudinal joint process comprises the following steps: pre-treating the edge of a paved first water-stable layer; paving a second water-stable layer beside the first water-stable layer, and spraying asphalt and macadam on the edge, close to the first water-stable layer, of the second water-stable layer; rolling the first water stable layer and the second water stable layer; asphalt is sprayed to the edge, close to the first water-stable layer, of the second water-stable layer, so that material particles of the water-stable layers are firmly bonded together through the good bonding performance of the asphalt, and the overall stability is improved; the contact area between the asphalt and the surface of the water-stable layer can be further increased by spraying the broken stones, so that the bonding effect is further enhanced, a transition layer with good bonding property and stability is formed at the joint of the first water-stable layer and the second water-stable layer, and the crack resistance and flatness of the joint are effectively enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of road construction, and in particular to a longitudinal joint process of water-stabilized paving and a road. Background Art

[0002] In the process of road construction, cement paste paving is a crucial link, which is directly related to the quality and service life of the road. However, in the process of cement paste paving, the treatment of longitudinal joints has always been a technical problem. Improper treatment of longitudinal joints can easily lead to cracks and settlement on the road, affecting the function and safety of the road. However, the current jointing technology still has problems such as uneven joints and inconsistent strength. Summary of the invention

[0003] The present invention provides a longitudinal joint process and road for water-stabilized concrete paving, which can effectively improve the quality of longitudinal joints of water-stabilized concrete paving.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] In a first aspect, the present invention provides a longitudinal joint process for water-stable paving, comprising:

[0006] Pre-treat the edge of the first water-stable layer that has been laid;

[0007] Spreading a second water-stable layer beside the first water-stable layer, and spraying asphalt and crushed stone on the edge of the second water-stable layer close to the first water-stable layer;

[0008] The first water-stable layer and the second water-stable layer are rolled.

[0009] In an optional embodiment, the pre-processing of the edge of the paved first water-stable layer further comprises:

[0010] cutting the edge of the first water-stable layer to form a vertical section;

[0011] cleaning the section;

[0012] Cement slurry is applied to the section to prepare for jointing with the second water-stable layer.

[0013] In an optional embodiment, the step of paving a second water-stable layer beside the first water-stable layer and spraying asphalt and gravel on the edge of the second water-stable layer close to the first water-stable layer further comprises:

[0014] Laying a first water-stable layer beside the first water-stable layer;

[0015] Spraying asphalt onto the first water-stable layer near the edge of the first water-stable layer;

[0016] After the asphalt is demulsified, stone chips are spread on the first water-stabilizing layer;

[0017] A second water-stable layer is spread on the first water-stable layer, so that the first water-stable layer and the second water-stable layer form the second water-stable layer together.

[0018] In an optional embodiment, the step of spreading a second water-stable layer on the first water-stable layer to form the second water-stable layer further comprises:

[0019] Using a light roller to roll the area where the stone chips are spread;

[0020] The second water-stable layer is spread on the rolled area to form the second water-stable layer.

[0021] In an optional embodiment, the step of spreading a second water-stable layer on the first water-stable layer further comprises:

[0022] The second water-stable layer at least partially overlaps with the first water-stable layer;

[0023] A heavy roller is used to vibrate the overlapping portion of the second water-stable layer and the first water-stable layer.

[0024] In an optional embodiment, the overlapping distance between the second water-stable layer and the first water-stable layer is at least 5 cm to 10 cm.

[0025] In an optional embodiment, spraying asphalt onto the first water-stable layer near the edge of the first water-stable layer further comprises:

[0026] Emulsified asphalt is sprayed within 30cm to 50cm of the edge of the first water-stable layer, and the spraying amount is 0.3kg / m 2 ~0.5kg / m 2 ;

[0027] And / or, spreading stone chips onto the first water-stable layer after the asphalt is demulsified further comprises:

[0028] The amount of stone chips spread on the first water-stabilizing layer is 3kg / m 2 -5kg / m 2 .

[0029] In an optional embodiment, the rolling the first water-stable layer and the second water-stable layer further comprises:

[0030] Using a roller to perform initial compaction from the second water-stable layer toward the first water-stable layer;

[0031] The second water-stable layer and the first water-stable layer are then subjected to re-pressurization and final pressurization.

[0032] In an optional embodiment, the water-stabilized paving longitudinal joint process further includes:

[0033] A joint tool is used to trim the joint between the first water-stable layer and the second water-stable layer.

[0034] In a second aspect, the present invention provides a road manufactured using the longitudinal jointing process of water-stabilized paving as described in any one of the aforementioned embodiments.

[0035] The beneficial effects of the longitudinal joint process and road of water-stabilized concrete paving provided by the embodiments of the present invention include: first, pre-treating the edge of the paved first water-stabilized concrete layer, such as cleaning, to prepare for subsequent joints; paving the second water-stabilized concrete layer next to the first water-stabilized concrete layer, and spraying asphalt at the edge of the second water-stabilized concrete layer close to the first water-stabilized concrete layer, so as to firmly bond the material particles of the water-stabilized concrete layer together through the good bonding properties of the asphalt, thereby improving the overall stability; and by spraying crushed stone, the crushed stone can further increase the contact area between the asphalt and the surface of the water-stabilized concrete layer, thereby further enhancing the bonding effect, thereby forming a transition layer with good bonding and stability at the joint of the first water-stabilized concrete layer and the second water-stabilized concrete layer, effectively enhancing the crack resistance and flatness of the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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.

[0037] Figure 1 A process flow chart for longitudinal joints of water-stabilized paving provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0043] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0044] In the process of road construction, cement paste paving is a crucial link, which is directly related to the quality and service life of the road. However, in the process of cement paste paving, the treatment of longitudinal joints has always been a technical problem. Improper treatment of longitudinal joints can easily lead to cracks and settlement on the road, affecting the function and safety of the road.

[0045] At present, the commonly used longitudinal joint processing methods include hot joints and cold joints. Hot joints are achieved by two pavers working in echelons, when the next piece of paving is not completely cooled down. However, hot joints have high requirements for construction organization and equipment, and are easily affected by factors such as weather. Cold joints are to pave one piece first, wait for it to completely cool down before paving the next piece, and finally use a cutting machine to cut the edges. Although this method is relatively simple to operate, it has high requirements for cutting and cleaning, and it is easy to produce a weakened layer at the joint.

[0046] The existing joint process usually includes the steps of joint setting, joint cutting, joint filling and rolling compaction: when the first day of construction is completed or interrupted for some reason, a transverse joint is set at the end position. When the construction continues on the second day, the joints between the new and old mixtures need to be processed to ensure that the joints are smooth; a cutting machine is used to cut a straight joint between the new mixture and the old mixture, and the excess or uneven parts are removed; an appropriate amount of cement slurry or special joint material is applied to the cut joints, and then the newly mixed water-stabilizing material is filled; a roller is used to roll the filled joints to ensure that the joints are tightly combined with the surrounding materials to achieve the required density and flatness.

[0047] Although the above methods can solve the problem of longitudinal joints to a certain extent, there are still the following shortcomings in actual operation: Uneven joints: Due to human factors in the cutting and filling process, the joints may be uneven, affecting the overall flatness of the road surface. Inconsistent strength: The joints of new and old mixtures may have inconsistent strength due to improper treatment, affecting the service life of the road surface. Low construction efficiency: The existing joint treatment methods are relatively cumbersome, requiring multiple cutting, filling and rolling, which affects the construction progress.

[0048] Based on the problems existing in the prior art, an embodiment of the present invention also provides a longitudinal joint process for water-stabilized paving, which is applied in the field of road construction. It can effectively improve the flatness and strength of the joints and improve construction efficiency.

[0049] For details, see Figure 1 The longitudinal joint process of water-stable paving provided by the embodiment of the present invention comprises the following steps:

[0050] Step S100, pre-treating the edge of the paved first water-stable layer;

[0051] Step S200, paving a second water-stable layer beside the first water-stable layer, and spraying asphalt and gravel on the edge of the second water-stable layer close to the first water-stable layer;

[0052] Step S300, rolling the first water-stable layer and the second water-stable layer.

[0053] In this embodiment, the edge of the paved first water-stable layer is first pretreated, for example, it can be cleaned, etc., to prepare for the subsequent joints; the second water-stable layer is paved next to the first water-stable layer, and asphalt is sprayed at the edge of the second water-stable layer close to the first water-stable layer, so that the material particles of the water-stable layer can be firmly bonded together by the good bonding properties of the asphalt, thereby improving the overall stability; and by spraying crushed stone, the crushed stone can further increase the contact area between the asphalt and the surface of the water-stable layer, thereby further enhancing the bonding effect, thereby forming a transition layer with good bonding and stability at the joint of the first water-stable layer and the second water-stable layer, effectively enhancing the crack resistance and flatness of the joint.

[0054] In addition, since asphalt has good waterproof properties, it can form a waterproof film on the surface of the water-stabilizing layer, reducing the penetration of moisture into the base layer, thereby preventing the softening of the base layer and subgrade settlement, thereby extending the service life of the road and reducing maintenance costs; not only that, the flexibility of asphalt can also reduce cracks and rutting caused by temperature changes and vehicle loads.

[0055] Stone chips are usually made of materials with high hardness and strong wear resistance. Spreading them on the asphalt layer can significantly improve the wear resistance of the road surface and reduce the wear of the wheels on the road surface. Therefore, the enhanced wear resistance helps to maintain the flatness of the road surface and driving comfort; the embedding of stone chips can also disperse the load, reduce local stress concentration, and further reduce the formation of rutting.

[0056] It can be seen that the process of spraying asphalt and spreading stone chips can improve the uniformity and consistency of construction and ensure the uniform quality of the entire water-stabilizing layer.

[0057] Furthermore, step S100 also includes the following sub-steps:

[0058] Sub-step S110, cutting the edge of the first water-stable layer to form a vertical section;

[0059] Sub-step S120, cleaning the cross section;

[0060] Sub-step S130, coating cement slurry on the section to prepare for jointing with the second water-stable layer.

[0061] In this embodiment, a vertical section is cut at the edge of the spread water-stable layer, and loose materials and dust on the vertical section are removed to avoid the joint between the first water-stable layer and the second water-stable layer; and cement slurry is coated on the section to increase the bonding strength between the first water-stable layer and the second water-stable layer, thereby forming a transition layer with good bonding and stability at the joint between the first water-stable layer and the second water-stable layer, effectively enhancing the crack resistance and flatness of the joint.

[0062] Furthermore, step S200 also includes the following sub-steps:

[0063] Sub-step S210, laying a first water-stable layer next to the first water-stable layer;

[0064] In this embodiment, the water-stable material is firstly laid beside the joints of the first water-stable layer to form the first water-stable layer.

[0065] Sub-step S220, spraying asphalt onto the edge of the first water-stable layer close to the first water-stable layer;

[0066] In this embodiment, after the first water-stable layer is paved, a spray truck is used to spray emulsified asphalt within a range of 30 cm to 50 cm from its edge, with a spraying amount of 0.3 kg / m 2 ~0.5kg / m 2 ; Use slow-cracking type emulsified asphalt to ensure sufficient demulsification time.

[0067] Sub-step S230, spreading stone chips on the first water-stable layer after the asphalt is demulsified;

[0068] In this embodiment, after the emulsified asphalt is demulsified, stone chips are spread on the area where the asphalt is sprayed on the first water-stabilizing layer. The amount of stone chips is 3kg / m 2 ~5kg / m 2 ; The stone chips should be clean limestone chips with uniform particle size.

[0069] Sub-step S240: spreading a second water-stable layer on the first water-stable layer to form a second water-stable layer.

[0070] In this embodiment, the water-stable material is continuously spread on the first water-stable layer to form a second water-stable layer, so that the first water-stable layer and the second water-stable layer together form a second water-stable layer.

[0071] In detail, sub-step S240 also includes:

[0072] Use a light roller to compact the area where the stone chips are spread;

[0073] A second water-stable layer is spread on the compacted area to form a second water-stable layer.

[0074] In this embodiment, a light roller with a specification of 6-8 tons is first used to roll the area where the stone chips are spread, and the rolling times are 2-3 times; the speed should be controlled during rolling to avoid too fast a speed causing the stone chips to fly.

[0075] Furthermore, sub-step S240 further includes:

[0076] The second water-stable layer at least partially overlaps the first water-stable layer;

[0077] A heavy roller is used to vibrate the overlapping part of the second water-stable layer and the first water-stable layer.

[0078] In this embodiment, the second water-stabilizing layer is paved on the compacted area, and during paving, it is ensured that there is at least partial overlap between the new material and the paved material; the overlapping part should be fully vibrated to ensure that the new and old materials are tightly combined.

[0079] Then use a 12-15 ton steel wheel roller to vibrate and compact the overlapping area 3-4 times. Vibration compaction should ensure the density and flatness of the joints.

[0080] Optionally, the overlapping distance between the second water-stable layer and the first water-stable layer is at least 5 cm to 10 cm.

[0081] Furthermore, sub-step S240 further includes:

[0082] Furthermore, step S300 includes the following sub-steps:

[0083] Sub-step S310, using a roller to perform initial compaction from the second water-stable layer toward the first water-stable layer;

[0084] In this embodiment, a roller is used to initially compact the newly laid water-stabilizing material. The roller first starts compacting from the second water-stabilizing layer and gradually approaches the first water-stabilizing layer.

[0085] It should be noted that after sub-step S310, the following sub-steps are also included:

[0086] Use the joint tool to trim the joints between the first water-stable layer and the second water-stable layer.

[0087] In this embodiment, a special tool is used to trim the joint to ensure that the joint is smooth.

[0088] Sub-step S320, re-pressurizing and final-pressing the second water-stable layer and the first water-stable layer.

[0089] In this embodiment, a roller is used to re-compact the entire second water-stable layer to ensure that the compaction degree meets the design requirements; finally, a roller is used to perform final compaction to eliminate wheel marks and ensure a smooth surface.

[0090] It should be noted that the rolling process performed in step S300 is also applicable to the rolling performed in step S200.

[0091] Therefore, through the above steps, the quality of the longitudinal joints of the water-stabilized paving can be effectively improved, and the overall strength and stability of the road can be enhanced.

[0092] Furthermore, an embodiment of the present invention also provides a road, which is manufactured using the water-stabilized paving longitudinal joint process in the above-mentioned embodiment.

[0093] In summary, the embodiment of the present invention provides a longitudinal joint process and road for water-stable paving, which improves the bonding strength at the joint by cutting vertical sections and applying cement slurry; adopts a gradually approaching initial pressure method to ensure the compaction of the joint; adopts a special joint processing tool to ensure the smoothness of the joint and improve the flatness of the road; in addition, the material particles of the water-stable layer are firmly bonded together by the good bonding performance of asphalt, thereby improving the overall stability; and by spraying crushed stone, the crushed stone can further increase the contact area between the asphalt and the surface of the water-stable layer, thereby further enhancing the bonding effect, thereby forming a transition layer with good bonding and stability at the joint of the first water-stable layer and the second water-stable layer, effectively enhancing the crack resistance and flatness of the joint; at the same time, the method of pre-pressing with a light roller and compacting with a steel wheel roller is adopted to ensure the density of the joint and improve the overall strength and service life of the road. In summary, the process is simple to construct, has low dependence on equipment and weather conditions, and is conducive to reducing construction costs and improving construction efficiency. The process has broad application prospects in road construction.

[0094] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A longitudinal joint process for water-stable paving, characterized in that: include: Pre-treat the edge of the first water-stable layer that has been laid; Spreading a second water-stable layer beside the first water-stable layer, and spraying asphalt and crushed stone on the edge of the second water-stable layer close to the first water-stable layer; The first water-stable layer and the second water-stable layer are rolled.

2. The longitudinal joint process of water-stabilized paving according to claim 1 is characterized in that: The pre-treatment of the edge of the paved first water-stable layer also includes: cutting the edge of the first water-stable layer to form a vertical section; cleaning the section; Cement slurry is applied to the section to prepare for jointing with the second water-stable layer.

3. The longitudinal jointing process of water-stabilized paving according to claim 1 is characterized in that: The method of paving a second water-stable layer beside the first water-stable layer and spraying asphalt and gravel on the edge of the second water-stable layer close to the first water-stable layer also includes: Laying a first water-stable layer beside the first water-stable layer; Spraying asphalt onto the first water-stable layer near the edge of the first water-stable layer; After the asphalt is demulsified, stone chips are spread on the first water-stabilizing layer; A second water-stable layer is spread on the first water-stable layer, so that the first water-stable layer and the second water-stable layer form the second water-stable layer together.

4. The longitudinal jointing process of water-stabilized paving according to claim 3 is characterized in that: The step of spreading a second water-stable layer on the first water-stable layer to form the second water-stable layer further comprises: Using a light roller to roll the area where the stone chips are spread; The second water-stable layer is spread on the rolled area to form the second water-stable layer.

5. The longitudinal jointing process of water-stabilized paving according to claim 3 is characterized in that: The step of spreading a second water-stable layer on the first water-stable layer further comprises: The second water-stable layer at least partially overlaps with the first water-stable layer; A heavy roller is used to vibrate the overlapping portion of the second water-stable layer and the first water-stable layer.

6. The longitudinal jointing process of water-stabilized paving according to claim 5 is characterized in that: The overlapping distance between the second water-stable layer and the first water-stable layer is at least 5 cm to 10 cm.

7. The longitudinal jointing process of water-stabilized paving according to claim 1 is characterized in that: The spraying of asphalt onto the first water-stable layer near the edge of the first water-stable layer also includes: Emulsified asphalt is sprayed within 30cm to 50cm of the edge of the first water-stable layer, and the spraying amount is 0.3kg / m 2 ~0.5kg / m 2 ; And / or, spreading stone chips onto the first water-stable layer after the asphalt is demulsified further comprises: The amount of stone chips spread on the first water-stabilizing layer is 3kg / m 2 -5kg / m 2 .

8. The longitudinal jointing process of water-stabilized paving according to claim 1 is characterized in that: The rolling of the first water-stable layer and the second water-stable layer further comprises: Using a roller to perform initial compaction from the second water-stable layer toward the first water-stable layer; The second water-stable layer and the first water-stable layer are then subjected to re-pressurization and final pressurization.

9. The longitudinal jointing process of water-stabilized paving according to claim 1 is characterized in that: The water-stable paving longitudinal joint process also includes: A joint tool is used to trim the joint between the first water-stable layer and the second water-stable layer.

10. A road, characterized in that: It is made by adopting the longitudinal joint process of water-stabilized paving as described in any one of claims 1 to 9.

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