CN219157312U - Node structure for widening between new road structure and old road structure of road surface - Google Patents
Node structure for widening between new road structure and old road structure of road surface Download PDFInfo
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- CN219157312U CN219157312U CN202223067113.2U CN202223067113U CN219157312U CN 219157312 U CN219157312 U CN 219157312U CN 202223067113 U CN202223067113 U CN 202223067113U CN 219157312 U CN219157312 U CN 219157312U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The utility model discloses a node structure for widening between new and old road structures of a road surface, which comprises the following steps: the utility model provides a novel, old road structure's basic unit between the back excavation to the breach that forms of basic unit end to and pour in concrete slab in the breach, geosynthetic material has been laid at concrete slab top, geosynthetic material extends concrete slab and extend to the basic unit top surface of novel, old road structure, through this application effectively reduce the influence of the reflection crack of road bed to the road surface, reduce the fracture risk, reduce rainwater erosion road bed risk, and then improved road surface structure's life.
Description
Technical Field
The utility model relates to the technical field of road surface nodes, in particular to a node structure for widening between new road structures and old road structures of a road surface.
Background
Early-stage pavement in China mainly uses cement concrete pavement, old cement concrete pavement is seriously damaged along with the increase of service life, and the width of the road cannot meet the existing traffic demand, so that diseases such as broken plates, pits, void and the like are required to be treated, the pavement width is widened, and an asphalt concrete surface layer is additionally paved after the cement concrete surface layer is constructed and modified, so that the travelling comfort is improved.
The old road widening construction mainly has the following problems: the influence of the differential settlement between the new roadbed and the old roadbed and the plastic accumulation deformation of the new roadbed on the pavement structure response; the influence of the rigidity difference between the new roadbed and the old roadbed on the structural response of the pavement; and preventing and curing reflection cracks of the surface layer. Because the settlement of the new roadbed and the old roadbed is uneven, the reflection cracks can cause the pavement to crack, damage and the like, and the rainwater can erode the roadbed along the cracks, so that the service life of the road is reduced.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, and provides a node structure for widening the gap between a new road structure and an old road structure of a road surface.
In order to achieve the above purpose, the present utility model adopts a technical scheme for widening a node structure between a new road structure and an old road structure of a road surface, including: the novel road structure comprises a gap formed by reversely excavating a base layer between a new road structure and an old road structure to the bottom of the base layer, and a concrete slab poured in the gap, wherein a geosynthetic material is paved on the top of the concrete slab, extends out of the concrete slab and extends to the top surfaces of the base layers of the new road structure and the old road structure.
The utility model widens the node structure between the new road structure and the old road structure of the road surface and further improves the structure in that the top of the basic layer of the new road structure and the top of the basic layer of the old road structure are respectively poured with a new surface layer, the node structure also comprises an expansion joint dowel steel, and the expansion joint dowel steel is connected between the two new surface layers.
The utility model widens the node structure between the new road structure and the old road structure of the road surface, and is further improved in that the two ends of the expansion joint dowel steel extend to the interior of the two newly-built surface layers by 20-25 cm respectively.
The utility model widens the node structure between the new road structure and the old road structure of the pavement, and is further improved in that construction joints are reserved between the concrete slab and the base layers of the new road structure and the old road structure respectively, and hot-melt asphalt is filled in the construction joints.
The utility model widens the node structure between the new road structure and the old road structure, and further improves the structure that the scope of the gap covers more than 25cm of the base layer of the new road structure and the old road structure.
The utility model extends to a further improvement in the node structure between new and old pavement structures in that the geosynthetic material extends and is secured to the top surface of the base layer of the new and old pavement structures.
Compared with the prior art, the utility model has the advantages that:
1. by arranging the concrete plate and paving the geosynthetic material on the upper part of the concrete plate, the uneven settlement between roadbeds is relieved, the influence of reflection cracks formed by the uneven settlement of the roadbeds on the road surface is greatly reduced, and the cracking risk of the surface layer is reduced
2. By arranging the expansion joint dowel steel and the hot-melt asphalt, the stability of the construction joint is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a cross-sectional view of the present utility model widening the node structure between new and old road structures.
In the figure: 1. newly-built a surface layer; 2. an expansion joint dowel bar; 3. a new base layer; 4. old base layer; 5. a concrete slab; 6. geosynthetic materials; 7. a new roadbed; 8. old roadbed.
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model.
The utility model widens the node structure between the new road structure and the old road structure of the pavement to be further described in detail below with reference to the attached drawings and the specific embodiments.
Referring to fig. 1, the widening of the node structure between the new road structure and the old road structure includes: the method comprises the steps of reversely excavating a gap formed between the base layers of the new and old road structures to the bottom of the base layer, and pouring a concrete slab 5 in the gap, wherein a geosynthetic material 6 is paved on the top of the concrete slab 5, and the geosynthetic material 6 extends out of the concrete slab 5 and extends to the top surfaces of the base layers of the new and old road structures.
Specifically, the new roadbed 7 is 4% cement stabilized chippings, the new base layer 3 is 6% cement stabilized chippings, and the geosynthetic material 6 is a polypropylene geogrid.
Specifically, the newly-built surface layer 1 is also paved with a pavement paving layer.
Preferably, the newly-built surface layer 1 is cast at the top of the basic layer of the new road structure and the top of the basic layer of the old road structure, the node structure further comprises an expansion joint dowel bar 2, and the expansion joint dowel bar 2 is connected between the two newly-built surface layers 1.
Preferably, two ends of the expansion joint dowel bar 2 extend to 20-25 cm inside the two newly-built surface layers 1 respectively.
Preferably, construction joints are reserved between the concrete-changing plate 5 and the base layers of the new road structure and the old road structure respectively, and the construction joints are filled with hot-melt asphalt.
Preferably, the range of the notch covers more than 25cm of the base layer of the new road structure and the old road structure.
Preferably, the geosynthetic material 6 extends and is secured to the top surface of the base course of the new and old pavement structure.
Specifically, the geosynthetic material 6 extends at least 25cm beyond the construction joint of the concrete slab 5 and the new substrate 3, and the geosynthetic material 6 extends at least 25cm beyond the construction joint of the concrete slab 5 and the old substrate 4.
A construction method for widening a node structure between a new road structure and an old road structure of a pavement comprises the following steps: firstly, breaking the old surface layer; pouring a new roadbed 7 and a new base layer 3 when the compaction of the soil base is more than or equal to 95%; the method comprises the steps of performing reverse excavation between a base layer of a new road structure and an old road structure, wherein the excavation depth is deep from the top of the base layer to the bottom of the base layer, the excavation widths of the new base layer 3 and the old base layer 4 are not smaller than 25cm, and a gap crossing a new roadbed 7 and an old roadbed 8 is formed after excavation; casting C15 and above strength concrete in the gap in situ and reserving construction joints between the base layers of the new and old road structures; filling hot-melt asphalt in construction joints of the concrete slab 5 and the new base layer 3 and the old base layer 4 respectively; arranging a polypropylene geogrid on the concrete slab 5, enabling the polypropylene geogrid to extend out of a construction joint of the concrete slab 5 and the new base layer 3 by at least 25cm, enabling the polypropylene geogrid to extend out of a construction joint of the concrete slab 5 and the old base layer 4 by at least 25cm, and fixing the polypropylene geogrid on a plane where the new base layer 3 and the old base layer 4 are located through steel nails; and pouring a new surface layer 1 on the top of the basic layer of the new road structure and the top of the basic layer of the old road structure respectively, connecting expansion joint dowel bars 2 between the two new surface layers 1, and paving a pavement layer on the top of the new surface layer 1.
It should be noted that, the structures, proportions, sizes and the like shown in the drawings attached to the present specification are used for understanding and reading only in conjunction with the disclosure of the present specification, and are not intended to limit the applicable limitations of the present utility model, so that any modification of the structures, variation of proportions or adjustment of sizes of the structures, proportions and the like should not be construed as essential to the present utility model, and should still fall within the scope of the disclosure of the present utility model without affecting the efficacy and achievement of the present utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.
The present utility model is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical matters of the present utility model can be made by those skilled in the art without departing from the scope of the present utility model.
Claims (6)
1. A node structure for widening between new and old road structures of a road surface, comprising: the novel road structure comprises a gap formed by reversely excavating a base layer between a new road structure and an old road structure to the bottom of the base layer, and a concrete slab poured in the gap, wherein a geosynthetic material is paved on the top of the concrete slab, extends out of the concrete slab and extends to the top surfaces of the base layers of the new road structure and the old road structure.
2. The node structure between new and old road structures of widening pavement according to claim 1, wherein the new and old road structures are cast at the top of the base layer, the node structure further comprises expansion joint dowel bars connected between the two new layers.
3. The node structure between new road structure and old road structure of widening pavement according to claim 2, wherein two ends of the expansion joint dowel bar extend to 20-25 cm inside two newly-built surface layers respectively.
4. The node structure between the new road structure and the old road structure of the widened pavement according to claim 1, wherein construction joints are reserved between the concrete slab and the base layers of the new road structure and the old road structure respectively, and hot-melt asphalt is filled in the construction joints.
5. The widened node structure between new and old road structures of claim 1, wherein the range of said gap each covers more than 25cm of the base layer of the new and old road structures.
6. The node structure between new and old pavement structures of claim 1 wherein said geosynthetic material extends and is secured to the top surface of the base course of said new and old pavement structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223067113.2U CN219157312U (en) | 2022-11-18 | 2022-11-18 | Node structure for widening between new road structure and old road structure of road surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223067113.2U CN219157312U (en) | 2022-11-18 | 2022-11-18 | Node structure for widening between new road structure and old road structure of road surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219157312U true CN219157312U (en) | 2023-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223067113.2U Active CN219157312U (en) | 2022-11-18 | 2022-11-18 | Node structure for widening between new road structure and old road structure of road surface |
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| Country | Link |
|---|---|
| CN (1) | CN219157312U (en) |
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2022
- 2022-11-18 CN CN202223067113.2U patent/CN219157312U/en active Active
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