CN216973018U - Bituminous paving based on full-depth formula foam asphalt is cold in-place to be regenerated - Google Patents
Bituminous paving based on full-depth formula foam asphalt is cold in-place to be regenerated Download PDFInfo
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- CN216973018U CN216973018U CN202220580784.XU CN202220580784U CN216973018U CN 216973018 U CN216973018 U CN 216973018U CN 202220580784 U CN202220580784 U CN 202220580784U CN 216973018 U CN216973018 U CN 216973018U
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Abstract
The utility model discloses a full-depth foamed asphalt in-situ cold recycling-based asphalt pavement, which comprises a limestone soil subbase layer, a stable base layer, a foamed asphalt cold recycling layer and an asphalt surface layer, wherein the stable base layer is arranged on the upper surface of the limestone soil subbase layer, the foamed asphalt cold recycling layer is arranged on the upper surface of the stable base layer, the asphalt surface layer is arranged on the upper surface of the foamed asphalt cold recycling layer, and the foamed asphalt cold recycling layer is prepared by cold recycling an asphalt layer of an original pavement and a second cement stable layer of the original pavement. When repairing damaged semi-rigid base course bituminous paving and forming the pavement structure of this application, directly carry out cold regeneration with the bituminous layer on former road surface and the second cement stable layer on former road surface and form the cold regeneration layer of foam pitch, then pour the bituminous surface layer on the cold regeneration layer of foam pitch, can accomplish semi-rigid base course bituminous paving's repair work, reached and shortened repair time, reduced repair cost's purpose.
Description
Technical Field
The utility model relates to the field of road construction, in particular to an asphalt pavement based on full-depth type foamed asphalt in-situ cold regeneration.
Background
The main form of existing highways is semi-rigid base asphalt pavement. The semi-rigid base asphalt pavement is usually damaged after long-time bearing and use, and the main damage mode of the pavement is that the semi-rigid base shrinks and cracks, so that the reflection cracks of the asphalt pavement are caused; or the semi-rigid substrate may experience fatigue failure under vehicle loading. It is therefore necessary to repair semi-rigid base asphalt pavements.
Referring to fig. 1, the semi-rigid base asphalt pavement structure sequentially comprises a lime soil subbase layer 1, a first cement stabilizing layer 5, a second cement stabilizing layer 6 and an asphalt layer 7 from bottom to top. The conventional road surface repairing method is to 'open the cavity and break the belly' of the road surface to the first cement stabilization layer 5 or the second cement stabilization layer 6, and then re-pave the damaged first cement stabilization layer 5 or the damaged second cement stabilization layer 6. The traditional repairing mode has long maintenance time, so that the pavement repairing cost is high.
In view of the foregoing, there is a need for an asphalt pavement based on cold in place recycling of full-depth foamed asphalt.
SUMMERY OF THE UTILITY MODEL
In view of the problems of long pavement repairing time and high cost, the utility model innovatively provides a full-depth foamed asphalt in-situ cold-recycling asphalt pavement, when the asphalt pavement repairs a damaged semi-rigid base asphalt pavement, a asphalt layer of an original pavement and a second cement stabilizing layer of the original pavement are directly subjected to cold recycling to form a foamed asphalt cold-recycling layer, and then an asphalt surface layer is poured on the upper surface of the foamed asphalt cold-recycling layer, so that the repairing work of the semi-rigid base asphalt pavement can be completed.
In order to achieve the technical purpose, the utility model discloses a full-depth foamed asphalt cold in-place recycling-based asphalt pavement, which comprises a limestone soil subbase layer, a stable base layer, a foamed asphalt cold recycling layer and an asphalt surface layer, wherein the stable base layer is arranged on the upper surface of the limestone soil subbase layer, the foamed asphalt cold recycling layer is arranged on the upper surface of the stable base layer, the asphalt surface layer is arranged on the upper surface of the foamed asphalt cold recycling layer, and the foamed asphalt cold recycling layer comprises an asphalt layer of an original pavement and a second cement stable layer of the original pavement.
Through the technical scheme, when the damaged semi-rigid base asphalt pavement is repaired, the asphalt layer of the original pavement and the second cement stabilizing layer of the original pavement are directly subjected to cold regeneration to form the foamed asphalt cold regeneration layer, then the asphalt surface layer is poured on the upper surface of the foamed asphalt cold regeneration layer, and the repairing work of the semi-rigid base asphalt pavement can be completed.
Furthermore, the stable base layer is a first cement stable layer of the original pavement.
Through above-mentioned modified technical scheme, the second cement stable layer on original road surface is damaged to under the first cement stable layer does not have the damaged condition, directly regard first cement stable layer as stable basic unit.
Furthermore, the stable base layer is a graded broken stone layer formed after the first cement stable layer of the original pavement is damaged.
Through above-mentioned modified technical scheme, after the equal damage of first cement stable layer and the second cement stable layer of former road surface, directly with the first cement stable layer after the damage as the graded rubble layer, need not carry out too much processing, only need prepare the cold regeneration layer of foam asphalt can, further shorten road surface repair time, reduce road surface repair cost.
Further, the height of the foamed asphalt cold regeneration layer is the sum of the height of a second cement stabilization layer of the original pavement and the height of an asphalt layer of the original pavement.
Through the improved technical scheme, the second cement stabilizing layer and the asphalt layer of the original pavement form the foamed asphalt cold regeneration layer through cold regeneration, so that the compacted regenerated base layer is added to the height of the second cement stabilizing layer and the asphalt layer of the original pavement after being compacted, and waste materials generated by the regenerated base layer are reduced as much as possible.
Further, the thickness of the asphalt surface layer is 4cm-10 cm.
Through the improved technical scheme, the thickness of the asphalt layer is set to be 4cm-10cm according to the height of the road surface, so that the aims of water resistance, skid resistance and rut resistance of the asphalt layer can be fulfilled, the height of the repaired road surface is unlikely to exceed that of an adjacent road too much, and the repaired road surface is convenient to be connected with a communicated road.
The utility model has the beneficial effects that:
compared with the prior art, when the damaged semi-rigid base asphalt pavement is repaired to form the pavement structure of the application, the asphalt layer of the original pavement and the second cement stabilizing layer of the original pavement are directly subjected to cold regeneration to form the foamed asphalt cold regeneration layer, and then the asphalt surface layer is poured on the upper surface of the foamed asphalt cold regeneration layer, so that the repair work of the semi-rigid base asphalt pavement can be completed.
Drawings
FIG. 1 is a schematic structural diagram of a semi-rigid base asphalt pavement.
FIG. 2 is a schematic structural diagram of a cold in-place asphalt pavement based on full-depth foamed asphalt.
In the figure, the position of the upper end of the main shaft,
1. a limestone soil sub-base layer; 2. stabilizing the base layer; 3. a foamed asphalt cold regeneration layer; 4. an asphalt surface layer; 5. a first cement stabilization layer; 6. a second cement stabilization layer; 7. an asphalt layer.
Detailed Description
The technical scheme of the utility model for the full-depth foamed asphalt cold-in-place recycling-based asphalt pavement is explained and illustrated in detail in the following with reference to the attached drawings, and obviously, the described embodiment is only a part of the embodiment of the utility model, but not all of the embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 and 2, the embodiment specifically discloses a full-depth foamed asphalt cold in-place recycling-based asphalt pavement, which includes a limestone soil sub-base layer 1, a stabilization base layer 2, a foamed asphalt cold recycling layer 3 and an asphalt surface layer 4, wherein the limestone soil sub-base layer 1 is arranged at the lowest part of the pavement, the stabilization base layer 2 is arranged on the upper surface of the limestone soil sub-base layer 1, and when the first cement stabilization layer 5 of the original pavement is not damaged, the stabilization base layer 2 is the first cement stabilization layer 5 of the original pavement; when the first cement stabilizing layer 5 of the original pavement is damaged, the stabilizing base layer 2 is a graded gravel layer formed after the first cement stabilizing layer 5 of the original pavement is damaged; the foamed asphalt cold regeneration layer 3 is arranged on the upper surface of the stable base layer 2, the foamed asphalt cold regeneration layer 3 comprises an asphalt layer 7 of an original road surface and a second cement stable layer 6 of the original road surface, the foamed asphalt cold regeneration layer 3 is prepared by utilizing a cold regenerator to carry out cold regeneration on the asphalt layer 7 of the original road surface and the second cement stable layer 6 of the original road surface, and the height of the foamed asphalt cold regeneration layer 3 is the sum of the height of the second cement stable layer 6 of the original road surface and the height of the asphalt layer 7 of the original road surface; the asphalt surface layer 4 is arranged on the upper surface of the foamed asphalt cold regeneration layer 3, the thickness of the asphalt surface layer 4 is 4cm-10cm, and the foamed asphalt cold regeneration layer 3 enables the asphalt pavement in the embodiment to be a flexible base asphalt pavement. The flexible base layer is not easy to crack due to temperature and drying shrinkage, and the generation of reflection cracks of the asphalt pavement can be effectively inhibited and reduced.
When the damaged semi-rigid base asphalt pavement is repaired to form the pavement structure, the asphalt layer 7 of the original pavement and the second cement stabilizing layer 6 of the original pavement are subjected to cold regeneration directly by using a cold regenerator to form a foamed asphalt cold regeneration layer 3, and then the foamed asphalt cold regeneration layer 3 is rolled and compacted to ensure that the height of the foamed asphalt cold regeneration layer 3 is the sum of the height of the second cement stabilizing layer 6 in the original pavement and the height of the asphalt layer 7 of the original pavement; and then pouring an asphalt surface layer 4 of 4cm-10cm on the upper surface of the foamed asphalt cold regeneration layer 3 according to the height of the asphalt pavement which can be changed to be high, so that the repair work of the semi-rigid base asphalt pavement can be completed, and compared with the conventional traditional pavement repair mode of opening the chamber and breaking the belly, the purposes of shortening the repair time and reducing the repair cost are achieved.
The implementation principle of the asphalt pavement based on the in-situ cold recycling of the full-depth foamed asphalt provided by the embodiment of the utility model is as follows: when the damaged semi-rigid base asphalt pavement is repaired to form the pavement structure, the asphalt layer 7 of the original pavement and the second cement stabilizing layer 6 of the original pavement are subjected to cold regeneration directly by using a cold regenerator to form a foamed asphalt cold regeneration layer 3, and then the foamed asphalt cold regeneration layer 3 is rolled and compacted to ensure that the height of the foamed asphalt cold regeneration layer 3 is the sum of the height of the second cement stabilizing layer 6 in the original pavement and the height of the asphalt layer 7 of the original pavement; and then pouring an asphalt surface layer 4 of 4-10 cm on the upper surface of the foamed asphalt cold regeneration layer 3 according to the height of the asphalt pavement which can be changed to be high, so that the repair work of the semi-rigid base asphalt pavement can be completed, and compared with the conventional pavement repair mode of opening the cavity and breaking the belly, the purposes of shortening the repair time and reducing the repair cost are achieved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "the present embodiment," "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the utility model, and any modifications, equivalents and simple improvements made on the spirit of the present invention should be included in the scope of the present invention.
Claims (5)
1. The utility model provides a bituminous paving based on cold in-place regeneration of full-depth formula foam asphalt which characterized in that: this bituminous paving includes lime soil subbase (1), stabilize basic unit (2), cold regeneration layer (3) of foam pitch and pitch surface course (4), it sets up the upper surface at lime soil subbase (1) to stabilize basic unit (2), cold regeneration layer (3) of foam pitch sets up the upper surface at stable basic unit (2), pitch surface course (4) set up the upper surface at cold regeneration layer (3) of foam pitch, cold regeneration layer (3) of foam pitch includes pitch layer (7) on former road surface and second cement stabilization layer (6) on former road surface.
2. The asphalt pavement based on full-depth foamed asphalt cold-in-place recycling according to claim 1, characterized in that: the stable base layer (2) is a first cement stable layer (5) of the original pavement.
3. The asphalt pavement based on full-depth foamed asphalt cold-in-place recycling according to claim 1, characterized in that: the stable base layer (2) is a graded broken stone layer formed after a first cement stable layer (5) of the original pavement is damaged.
4. The asphalt pavement based on full-depth foamed asphalt cold-in-place recycling according to claim 2 or 3, characterized in that: the height of the foamed asphalt cold regeneration layer (3) is the sum of the height of the second cement stabilization layer (6) of the original pavement and the height of the asphalt layer (7) of the original pavement.
5. The asphalt pavement based on full-depth foamed asphalt cold-in-place recycling of claim 4, characterized in that: the thickness of the asphalt surface layer (4) is 4cm-10 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220580784.XU CN216973018U (en) | 2022-03-16 | 2022-03-16 | Bituminous paving based on full-depth formula foam asphalt is cold in-place to be regenerated |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220580784.XU CN216973018U (en) | 2022-03-16 | 2022-03-16 | Bituminous paving based on full-depth formula foam asphalt is cold in-place to be regenerated |
Publications (1)
| Publication Number | Publication Date |
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| CN216973018U true CN216973018U (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220580784.XU Active CN216973018U (en) | 2022-03-16 | 2022-03-16 | Bituminous paving based on full-depth formula foam asphalt is cold in-place to be regenerated |
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| CN (1) | CN216973018U (en) |
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2022
- 2022-03-16 CN CN202220580784.XU patent/CN216973018U/en active Active
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