CN218951867U - Composite reinforced roadbed widening structure for road widening - Google Patents
Composite reinforced roadbed widening structure for road widening Download PDFInfo
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- CN218951867U CN218951867U CN202223468181.XU CN202223468181U CN218951867U CN 218951867 U CN218951867 U CN 218951867U CN 202223468181 U CN202223468181 U CN 202223468181U CN 218951867 U CN218951867 U CN 218951867U
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Abstract
The utility model belongs to the technical field of highway construction, and relates to a composite reinforced roadbed widening structure for widening a road, which comprises the following components: an asphalt mixture layer and a foam light soil layer; the cement stabilized soil layer is arranged at the lower part of the foam light soil layer; the restraint assembly is arranged between the asphalt mixture layer and the foam lightweight soil layer, between the foam lightweight soil layer and the cement stabilized soil layer and below the cement stabilized soil layer and is used for restraining lateral deformation among the asphalt mixture layer, the foam lightweight soil layer and the cement stabilized soil layer; the anchoring assembly is arranged on the side face of the constraint assembly and used for enhancing mutual constraint between the new roadbed and the old roadbed. According to the utility model, through the matched arrangement of the asphalt mixture layer, the foam lightweight soil layer, the cement stabilized soil layer, the constraint component and the anchoring component, the mutual constraint between the new roadbed and the old roadbed is enhanced, the overall stability of the widened roadbed is improved, and uneven settlement is reduced, so that the formation of longitudinal cracks between the new roadbed and the old roadbed is avoided, and the quality of the expanded road surface is ensured.
Description
Technical Field
The utility model belongs to the technical field of highway construction, and relates to a composite reinforced roadbed widening structure for road widening.
Background
Along with modern construction of China, a road is closely related to the whole country like a blood vessel, but is limited by various factors such as economic and social development scale, engineering technical level, design planning thought, construction cost and the like in the initial stage of construction, so that the conventional road construction scale cannot meet the continuous increase of traffic, and the conventional road needs to be expanded to meet the increase of traffic. However, compared with a newly built highway, the reconstruction and expansion engineering has the characteristics of high construction difficulty, complex process, difficult quality control and the like, and the main reason is that the old roadbed is completely settled under the action of long-term external load and dead weight load, and the increase of the new roadbed inevitably generates settlement difference with the old roadbed.
At present, in reconstruction and expansion engineering, a semi-rigid base layer is generally adopted for the expansion road surface, and because the joint of the new roadbed and the old roadbed is due to uneven settlement generated by the roadbeds at two sides, longitudinal cracks are formed between the new roadbed and the old roadbed, and the quality of the expansion road surface is affected.
Disclosure of Invention
The utility model aims to provide a composite reinforced roadbed widening structure for widening a road, which aims to solve the technical problem that the quality of the road is affected by the fact that the existing road is generally a semi-rigid base layer, and longitudinal cracks are formed between a new roadbed and an old roadbed due to the non-uniformity of roadbeds at two sides at the joint of the new roadbed and the old roadbed.
In order to achieve the above purpose, the concrete technical scheme of the composite reinforced roadbed widening structure for widening the road is as follows:
a composite reinforced subgrade widening structure for road widening, comprising:
the asphalt mixture layer is arranged on the uppermost layer;
the foam light soil layer is arranged at the lower part of the asphalt mixture layer;
the cement stabilized soil layer is arranged at the lower part of the foam light soil layer;
the restraint assembly is arranged between the asphalt mixture layer and the foam lightweight soil layer, between the foam lightweight soil layer and the cement stabilized soil layer and below the cement stabilized soil layer and is used for restraining lateral deformation among the asphalt mixture layer, the foam lightweight soil layer and the cement stabilized soil layer;
the anchoring assembly is arranged on the side face of the constraint assembly and used for enhancing mutual constraint between the new roadbed and the old roadbed.
The utility model is also characterized in that:
the widths of the asphalt mixture layer, the foam light soil layer and the cement stabilized soil layer are sequentially reduced from top to bottom and the same side is flush, so that the other sides of the asphalt mixture layer, the foam light soil layer and the cement stabilized soil layer form an inverted ladder.
The restraining component comprises three reinforced cushion layers, wherein the three reinforced cushion layers are respectively arranged between the asphalt mixture layer and the foam light soil layer, between the foam light soil layer and the cement stabilized soil layer and below the cement stabilized soil layer.
Each reinforced cushion layer consists of a geogrid and graded broken stones, and the graded broken stones are arranged in the geogrid.
Wherein the anchor subassembly includes three ribbed steel bars, and three ribbed steel bars set up respectively in the one side that the three-layer ribbed cushion layer is close to the inverted ladder type structure, and the one end of every ribbed steel bar is connected with the side of corresponding ribbed cushion layer, and the other end of every ribbed steel bar is provided with stock anchor section and stock anchor section is located inside old road bed, has pour cement mortar around the shaft of every ribbed steel bar.
Wherein one end of each ribbed steel bar far away from the three-layer reinforced cushion layer is inclined downwards.
Wherein the anchor rod anchoring section is formed by pouring reinforced concrete.
The lower parts of the three layers of reinforced cushion layers are respectively and vertically provided with a plurality of prestressed piles, the prestressed piles are respectively arranged on the three layers of steps along the inverted step-shaped structure, the upper end of each prestressed pile is provided with a pile cap, and the upper parts of the pile caps are connected with the lower parts of the corresponding reinforced cushion layers.
The composite reinforced roadbed widening structure for road widening has the following advantages:
firstly, through the cooperation arrangement of the asphalt mixture layer, the foam lightweight soil layer, the cement stabilized soil layer, the constraint component and the anchoring component, mutual constraint between the new roadbed and the old roadbed is enhanced, the overall stability of the widened roadbed is improved, uneven settlement is reduced, and therefore longitudinal cracks are prevented from being formed between the new roadbed and the old roadbed, and the quality of the expanded road surface is ensured;
secondly, through the horizontal direction of the anchoring assembly and the vertical matching arrangement of the four prestress piles, the water stability of the new roadbed can be enhanced, the shearing resistance can be enhanced, and the vertical sedimentation can be reduced, so that the mechanical property of the widened roadbed is improved, the widened roadbed has reliable quality, large treatment depth, quick construction and small sedimentation, and the interference on the old roadbed is small;
thirdly, through the arrangement of the inverted ladder-shaped structure, the contact area between the new roadbed and the old roadbed is increased, and meanwhile, the widened structural support is provided, so that the stability of the widened roadbed is further improved.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
Fig. 2 is a schematic longitudinal section of the present utility model.
FIG. 3 is a schematic diagram of the structure of the reinforcing mat according to the present utility model.
Fig. 4 is an enlarged schematic view of the structure of fig. 2 a according to the present utility model.
Reference numerals:
1. old roadbed; 2. a new roadbed; 201. an asphalt mixture layer; 202. a reinforced cushion layer; 203. a foamed light soil layer; 204. cement stabilizing soil layer; 205. a soil base; 301. a bolt anchoring section; 302. cement mortar; 303. ribbed steel bar; 401. a pile cap; 402. prestress piles; 501. geogrid; 502. grading crushed stone.
Detailed Description
The utility model will be described in detail below with reference to the drawings and the detailed description.
As shown in fig. 1 and 2, the composite reinforced roadbed widening structure for road widening comprises an asphalt mixture layer 201, wherein the asphalt mixture layer 201 is arranged on one side of an old roadbed 1 and is positioned on the upper portion of a soil foundation 205, the asphalt mixture layer 201 is arranged on the uppermost layer, the asphalt mixture layer 201 is positioned on the upper portion of the soil foundation 205, a foam lightweight soil layer 203 is arranged at the lower portion of the asphalt mixture layer 201, a cement stabilized soil layer 204 is arranged at the lower portion of the foam lightweight soil layer 203, the lower portion of the cement stabilized soil layer 204 is connected with the upper surface of the soil foundation 205, a new roadbed 2 is formed by the asphalt mixture layer 201, the foam lightweight soil layer 203 and the cement stabilized soil layer 204 together, a constraint component is arranged between the asphalt mixture layer 201 and the foam lightweight soil layer 203, between the foam lightweight soil layer 203 and the cement stabilized soil layer 204, the lower portion of the cement stabilized soil layer 204 is respectively connected with the asphalt mixture layer 201, the foam lightweight soil layer 203 and the cement stabilized soil layer 204, the constraint component is used for constraining the asphalt mixture layer 203, the foam lightweight soil layer 203, the cement stabilized soil layer 203 is laterally deformed, the cement stabilized soil layer 204 is laterally, the lower portion is fixedly deformed, the lower portion of the cement stabilized soil layer 204 is connected with the old roadbed is formed, the new roadbed is not uniformly, the new roadbed 2 is formed, the quality is improved, and the quality of the new roadbed is improved, and the new roadbed is not is widened, and the quality is not well-expanded, and the new roadbed is formed, and the quality is well, and the new roadbed is stable, and is stable.
The widths of the asphalt mixture layer 201, the foam lightweight soil layer 203 and the cement stabilized soil layer 204 are sequentially reduced from top to bottom and the same side is flush, so that the asphalt mixture layer 201, the foam lightweight soil layer 203 and the other side of the cement stabilized soil layer 204 form an inverted ladder-shaped structure, side slopes of the old roadbed 1 are arranged into three layers of ladder-shaped structures which are matched with each other, parts of the asphalt mixture layer 201, parts of the foam lightweight soil layer 203 and parts of the cement stabilized soil layer 204 are connected with the three layers of the old roadbed 1, the side surfaces of the cement stabilized soil layer 204 are connected with the old roadbed 1, the lower part of the side surface of the foam lightweight soil layer 203 is connected with the first layer of the old roadbed 1 in a ladder-shaped manner, the rest part of the side surfaces of the foam lightweight soil layer 203 and the second layer of the old roadbed 1 are connected with the ladder-shaped structure, the rest part of the foam lightweight soil layer 203 and the upper part of the cement stabilized soil layer 204 are connected with the third layer of the old roadbed 1 in a ladder-shaped manner, the lower part of the cement stabilized soil layer 204 is connected with the soil layer 205, and the new support area is given to the new roadbed 2 between the old roadbed 1 and the new roadbed 2 in a ladder-shaped manner.
The restraint assembly comprises three reinforced cushion layers 202, wherein the three reinforced cushion layers 202 are respectively arranged between the asphalt mixture layer 201 and the foam lightweight soil layer 203, between the foam lightweight soil layer 203 and the cement stabilized soil layer 204, and between the lower part of the cement stabilized soil layer 204 and the soil base 205.
As shown in fig. 3, each reinforced cushion layer 202 is composed of a geogrid 501 and graded broken stone 502, the graded broken stone 502 is arranged inside the geogrid 501, the proper value of the reinforced spacing of the geogrid 501 is 0.4-0.8 m, the length of the reinforced bars of the geogrid is 4m, and the interaction between the reinforced cushion layer 202 and the new roadbed filler restricts the lateral deformation of the new roadbed.
As shown in fig. 2 and 4, the anchoring assembly includes three ribbed steel bars 303, the three ribbed steel bars 303 are respectively disposed on one side of the three-layer reinforced cushion layer 202 close to the inverted step structure, one end of each ribbed steel bar 303 is connected with the side surface of the corresponding reinforced cushion layer 202, the other end of each ribbed steel bar 303 is provided with an anchor rod anchoring section 301, the anchor rod anchoring section 301 is located inside an old roadbed, cement mortar 302 is poured around the shaft of each ribbed steel bar 303, one end of each ribbed steel bar 303 far away from the three-layer reinforced cushion layer 202 is inclined downwards, and the anchor rod anchoring section 301 is formed by pouring reinforced concrete.
A plurality of prestressed piles 402 are vertically arranged between the lower part of the three-layer reinforced cushion layer 202 and the three-layer steps of the old roadbed 1 respectively, the plurality of prestressed piles 402 are respectively arranged on the three-layer steps along the inverted stepped structure of the new roadbed 2, the prestressed piles 402 of the uppermost layer and the middle layer can be arranged in a row along the length direction of the new roadbed 2, the prestressed piles 402 of the lowermost layer can be arranged in two rows along the length direction of the new roadbed 2, the lower end of each prestressed pile 402 is positioned in the soil foundation 205, the upper end of each prestressed pile 402 is provided with a pile cap 401, the upper part of the pile cap 401 is connected with the lower part of the corresponding reinforced cushion layer 202, the prestressed piles adopt the static pressure prestressed pile technology, form a vertical reinforcement composite foundation with soil between piles, the coordination capability between piles and soil and the single pile high bearing capacity of the piles are fully exerted, and foundation deformation is well controlled.
The composite reinforced roadbed widening structure for road widening has the following advantages:
firstly, through the cooperation arrangement of the asphalt mixture layer, the foam lightweight soil layer, the cement stabilized soil layer, the constraint component and the anchoring component, mutual constraint between the new roadbed and the old roadbed is enhanced, the overall stability of the widened roadbed is improved, uneven settlement is reduced, and therefore longitudinal cracks are prevented from being formed between the new roadbed and the old roadbed, and the quality of the expanded road surface is ensured;
secondly, through the horizontal direction of the anchoring assembly and the vertical matching arrangement of the four prestress piles, the water stability of the new roadbed can be enhanced, the shearing resistance can be enhanced, and the vertical sedimentation can be reduced, so that the mechanical property of the widened roadbed is improved, the widened roadbed has reliable quality, large treatment depth, quick construction and small sedimentation, and the interference on the old roadbed is small;
thirdly, through the arrangement of the inverted ladder-shaped structure, the contact area between the new roadbed and the old roadbed is increased, and meanwhile, the widened structural support is provided, so that the stability of the widened roadbed is further improved.
It will be understood that the utility model has been described in terms of several embodiments, and that various changes and equivalents may be made to these features and embodiments by those skilled in the art without departing from the spirit and scope of the utility model. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the utility model without departing from the essential scope thereof. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (8)
1. A composite reinforced subgrade widening structure for road widening, comprising:
an asphalt mixture layer (201) arranged on the uppermost layer;
a foam lightweight soil layer (203) which is arranged at the lower part of the asphalt mixture layer (201);
a cement stabilized soil layer (204) arranged at the lower part of the foam lightweight soil layer (203);
the restraint assembly is arranged between the asphalt mixture layer (201) and the foam lightweight soil layer (203), between the foam lightweight soil layer (203) and the cement stabilized soil layer (204) and below the cement stabilized soil layer (204) and is used for restraining lateral deformation among the asphalt mixture layer (201), the foam lightweight soil layer (203) and the cement stabilized soil layer (204);
the anchoring assembly is arranged on the side face of the constraint assembly and used for enhancing mutual constraint between the new roadbed and the old roadbed.
2. The composite reinforced roadbed widening structure for road widening according to claim 1, wherein the asphalt mixture layer (201), the foam lightweight soil layer (203) and the cement stabilized soil layer (204) are sequentially reduced in width from top to bottom and are flush with the same side surface, so that the asphalt mixture layer (201), the foam lightweight soil layer (203) and the other side of the cement stabilized soil layer (204) form an inverted stepped structure.
3. A composite reinforced subgrade widening structure for road widening according to claim 2, in which said constraining assembly comprises three layers of reinforced mat layers (202), said three layers of reinforced mat layers (202) being disposed between asphalt mixture layer (201) and foamed lightweight soil layer (203), foamed lightweight soil layer (203) and cement stabilized soil layer (204), cement stabilized soil layer (204) lower portion, respectively.
4. A composite reinforced subgrade widening structure for road widening according to claim 3, characterized in that each layer of said reinforced mat layer (202) is composed of geogrid (501) and graded crushed stone (502), said graded crushed stone (502) being disposed inside geogrid (501).
5. A composite ribbed subgrade widening structure for road widening according to claim 3, characterized in that said anchor assembly comprises three ribbed steel bars (303), three ribbed steel bars (303) are respectively arranged on one side of the three-layer ribbed bedding layer (202) close to the inverted step-shaped structure, one end of each ribbed steel bar (303) is connected with the side of the corresponding ribbed bedding layer (202), the other end of each ribbed steel bar (303) is provided with an anchor rod anchor section (301) and the anchor rod anchor section (301) is positioned in the old subgrade, and cement mortar (302) is poured around the shaft of each ribbed steel bar (303).
6. A composite reinforced subgrade widening structure for road widening according to claim 5, in which each of said ribbed steel bars (303) is inclined downwardly away from one end of the three layer ribbed bedding layer (202).
7. A composite reinforced subgrade widening structure for road widening according to claim 5, in which said anchor rod anchoring segment (301) is a reinforced concrete casting.
8. A composite reinforced subgrade widening structure for road widening according to claim 3, characterized in that the lower parts of three layers of said reinforced cushion layers (202) are vertically provided with a plurality of prestressed piles (402) respectively, said prestressed piles (402) are respectively arranged on three layers of steps along an inverted step-like structure, the upper end of each of said prestressed piles (402) is provided with a pile cap (401), and the upper part of said pile cap (401) is connected with the lower part of the corresponding reinforced cushion layer (202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223468181.XU CN218951867U (en) | 2022-12-26 | 2022-12-26 | Composite reinforced roadbed widening structure for road widening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223468181.XU CN218951867U (en) | 2022-12-26 | 2022-12-26 | Composite reinforced roadbed widening structure for road widening |
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| Publication Number | Publication Date |
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| CN218951867U true CN218951867U (en) | 2023-05-02 |
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| CN202223468181.XU Active CN218951867U (en) | 2022-12-26 | 2022-12-26 | Composite reinforced roadbed widening structure for road widening |
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| CN (1) | CN218951867U (en) |
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- 2022-12-26 CN CN202223468181.XU patent/CN218951867U/en active Active
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