CN215947770U - Rigid roadbed and flexible roadbed interface - Google Patents
Rigid roadbed and flexible roadbed interface Download PDFInfo
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- CN215947770U CN215947770U CN202121423016.5U CN202121423016U CN215947770U CN 215947770 U CN215947770 U CN 215947770U CN 202121423016 U CN202121423016 U CN 202121423016U CN 215947770 U CN215947770 U CN 215947770U
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- roadbed
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- geogrid
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- 239000010410 layer Substances 0.000 claims abstract description 145
- 239000003365 glass fiber Substances 0.000 claims abstract description 42
- 239000010426 asphalt Substances 0.000 claims abstract description 21
- 229920003023 plastic Polymers 0.000 claims abstract description 20
- 239000004033 plastic Substances 0.000 claims abstract description 20
- 239000004744 fabric Substances 0.000 claims abstract description 17
- 239000002344 surface layer Substances 0.000 claims abstract description 14
- 239000004746 geotextile Substances 0.000 claims description 20
- 239000011521 glass Substances 0.000 claims description 13
- 239000000853 adhesive Substances 0.000 claims description 9
- 239000004575 stone Substances 0.000 claims description 9
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 229920013716 polyethylene resin Polymers 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000012209 synthetic fiber Substances 0.000 claims description 5
- 229920002994 synthetic fiber Polymers 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 230000002265 prevention Effects 0.000 abstract description 5
- 239000002689 soil Substances 0.000 abstract description 5
- 239000004566 building material Substances 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 4
- 230000004888 barrier function Effects 0.000 abstract description 3
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- 238000001764 infiltration Methods 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 6
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- 239000000463 material Substances 0.000 description 4
- 239000002253 acid Substances 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 239000003513 alkali Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 239000004567 concrete Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
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- 239000002250 absorbent Substances 0.000 description 2
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- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 238000000071 blow moulding Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004049 embossing Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 238000001467 acupuncture Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004595 color masterbatch Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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- Road Paving Structures (AREA)
Abstract
The utility model relates to the technical field of roadbeds, in particular to an interface of a rigid roadbed and a flexible roadbed, which comprises a surface layer, wherein the surface layer comprises an asphalt layer, a steel-plastic geogrid layer and a first glass fiber geogrid layer, the steel-plastic geogrid layer is arranged at the bottom of the asphalt layer, and the first glass fiber geogrid layer is arranged at the bottom of the steel-plastic geogrid layer. The utility model has the advantages that: the steel-plastic geogrid layer can be matched with the first glass fiber geogrid layer, so that the influence of temperature on the interface connection strength is reduced, the defect that the first glass fiber geogrid layer has low connection strength on the rigid roadbed is overcome, and the connection strength of the flexible roadbed and the rigid roadbed is further improved; the barrier layer comprises first geotechnological cloth layer and geotechnological rete, and both combine together and can play the effect of waterproof prevention of seepage, can reduce the water in the flexible road bed of infiltration, and the second geotechnological cloth layer can effectively keep apart base soil and building material to there is certain drainage, is favorable to the drainage.
Description
Technical Field
The utility model relates to the technical field of roadbed, in particular to an interface of a rigid roadbed and a flexible roadbed.
Background
At present, as the traffic flow density increases, the road surface becomes relatively narrow, and in order to improve the traffic capacity of the road, the road needs to be widened. Meanwhile, with the rapid increase of traffic volume, the damage to the road surface is increasingly aggravated, and more road surfaces face repair work. In road widening and repairing construction, a rigid roadbed and a flexible roadbed can be jointed. The rigidity of the rigid roadbed is high, and the deformation under the action of load is small; the rigidity of the flexible roadbed is relatively small, and the deformation under the action of load is relatively large. The deformation of the two is different, and the interface will crack over time.
In the interface between a rigid roadbed and a flexible roadbed disclosed in the chinese patent CN210737260U, the glass fiber geogrid coated on the surface of the rigid roadbed and the flexible roadbed by using self-adhesive pressure sensitive adhesive or modified asphalt has not only the excellence of glass fiber, but also the compatibility with asphalt mixture, so that the grid and asphalt pavement are tightly combined into a whole, and the anti-reflection crack capability and strength of the surface layer at the position are enhanced, however, the interface between the rigid roadbed and the flexible roadbed has the following disadvantages while solving the problems:
1. the bonding strength of the self-adhesive glass fiber geogrid and the concrete is not as high as that of the self-adhesive glass fiber geogrid and the asphalt, so that the strength of the self-adhesive glass fiber geogrid and the concrete is possibly low, and the tensile strength of the self-adhesive glass fiber geogrid is greatly influenced by temperature;
2. the water seeping into the asphalt has an influence on the service life of the asphalt pavement, and the water in the rigid roadbed can seep into the asphalt of the flexible roadbed due to the different seepage prevention rates of the materials in the rigid roadbed and the flexible roadbed.
SUMMERY OF THE UTILITY MODEL
The present invention aims to overcome the disadvantages of the prior art and to provide a rigid subgrade and flexible subgrade interface.
The purpose of the utility model is realized by the following technical scheme: an interface of a rigid roadbed and a flexible roadbed comprises a surface layer, wherein the surface layer comprises an asphalt layer, a steel-plastic geogrid layer and a first glass fiber geogrid layer;
the flexible roadbed is arranged at the bottom of the surface layer, one side of the flexible roadbed is provided with an impermeable layer, the impermeable layer comprises a first geotechnical cloth layer and a geotechnical film layer, one side of the flexible roadbed is provided with a first geotechnical cloth layer, and one side of the first geotechnical cloth layer, which is far away from the flexible roadbed, is provided with a geotechnical film layer;
one side of geomembrane layer is provided with the rigid roadbed, the bottom of rigid roadbed is provided with the bottom, the bottom includes the fine geogrid layer of the second glass and second geotechnological cloth layer, the bottom of rigid roadbed is provided with the fine geogrid layer of the second glass, the bottom on the fine geogrid layer of the second glass is provided with the second geotechnological cloth layer.
Preferably, the material of steel-plastic geogrid layer is high-strength steel wire, and the first glass fiber geogrid layer is anchored into the rigid roadbed and the flexible roadbed and is not less than mm.
Preferably, the flexible roadbed comprises cement-stabilized macadam and hill-skill stone, the bottom of the first glass fiber geogrid layer is provided with cement-stabilized macadam, and the bottom of the cement-stabilized macadam is provided with hill-skill stone.
Preferably, the first geotextile layer and the second geotextile layer are both made of synthetic fibers, and the geomembrane layer is made of polyethylene resin.
Preferably, flexible road bed and rigid road bed all set up in the fine geogrid layer bottom of first glass, flexible road bed and rigid road bed all set up in the top on the fine geogrid layer of second glass.
Preferably, the first glass fiber geogrid layer and the second glass fiber geogrid layer are coated on the surfaces of self-adhesive pressure-sensitive adhesive or modified asphalt.
The utility model has the following advantages:
1. the steel-plastic geogrid layer is specially processed by high-strength steel wires and polyethylene, and other additives are added, so that the rigid roadbed and the flexible roadbed have an interface, are extruded to form a composite high-strength tensile strip, have rough embossing on the surface, and have high strength and small deformation; creep is small; the flexible roadbed is corrosion-resistant, long in service life, ageing-resistant and oxidation-resistant, can resist corrosion of severe environments such as acid, alkali and salt, is excellent in performance and good in dimensional stability, can be matched with the first glass fiber geogrid layer, reduces the influence of temperature on interface connection strength, and makes up the defect that the first glass fiber geogrid layer has low connection strength on the rigid roadbed, so that the connection strength of the flexible roadbed and the rigid roadbed is further improved;
2. this rigidity road bed and flexible road bed interface, through setting up first geotechnological cloth layer, geotechnological rete and second geotechnological cloth layer, geotechnological cloth is the water permeability geosynthetic material that is formed through acupuncture or weaving by synthetic fiber, the geotechnological rete is with the carbon black masterbatch that polyethylene resin adds certain proportion, anti-aging agent, the antioxidant, ultraviolet absorbent, blow molding such as stabilizer forms, the barrier layer comprises first geotechnological cloth layer and geotechnological rete, both combine together and can play waterproof and anti-seepage's effect, can reduce the water in the flexible road bed of infiltration, thereby reduce the probability of road surface damage, second geotechnological cloth layer can effectively keep apart substrate soil and building material, and have certain drainage, be favorable to rigidity road bed and flexible road bed drainage.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a cross section of the present invention;
fig. 3 is a schematic view of the structure of the barrier layer of the present invention.
In the figure: 1-surface layer, 101-asphalt layer, 102-steel-plastic geogrid layer, 103-first glass fiber geogrid layer, 2-flexible roadbed, 201-cement stabilized macadam, 202-hill skin stone, 3-impermeable layer, 301-first geotextile layer, 302-geomembrane layer, 4-rigid roadbed, 5-bottom layer, 501-second glass fiber geogrid layer and 502-second geotextile layer.
Detailed Description
The utility model will be further described with reference to the accompanying drawings, but the scope of the utility model is not limited to the following.
As shown in fig. 1-3, an interface between a rigid roadbed and a flexible roadbed comprises a surface layer 1, wherein the surface layer comprises an asphalt layer 101, a steel-plastic geogrid layer 102 and a first glass fiber geogrid layer 103, the steel-plastic geogrid layer 102 is arranged at the bottom of the asphalt layer 101, the steel-plastic geogrid layer 102 can be matched with the first glass fiber geogrid layer 103, the influence of temperature on the interface connection strength is reduced, the defect that the first glass fiber geogrid layer 103 has lower connection strength on the rigid roadbed 4 is overcome, and the first glass fiber geogrid layer 103 is arranged at the bottom of the steel-plastic geogrid layer 102;
the bottom of the surface layer 1 is provided with a flexible roadbed 2, one side of the flexible roadbed 2 is provided with an impermeable layer 3, the impermeable layer 3 improves the waterproof effect of the whole interface and can prolong the service life of the interface, the impermeable layer 3 comprises a first geotextile layer 301 and a geomembrane layer 302, one side of the flexible roadbed 2 is provided with the first geotextile layer 301, and one side of the first geotextile layer 301, which is far away from the flexible roadbed 2, is provided with the geomembrane layer 302;
one side of geomembrane layer 302 is provided with rigid roadbed 4, rigid roadbed 4 comprises the concrete, rigid roadbed 4's bottom is provided with bottom 5, bottom 5 includes the fine geogrid layer 501 of the second glass and second geotechnological cloth layer 502, rigid roadbed 4's bottom is provided with the fine geogrid layer 501 of the second glass, the fine geogrid layer 501's of the second glass bottom is provided with second geotechnological cloth layer 502, second geotechnological cloth layer 502 can effectively keep apart basement soil and building material, and have certain drainage, be favorable to rigid roadbed 4 and flexible roadbed 2 drainage.
As a preferred technical scheme of the utility model, the steel-plastic geogrid layer 102 is made of high-strength steel wires, and has high strength and small deformation; creep is small; the glass fiber geogrid layer 103 is resistant to corrosion, long in service life, ageing-resistant and oxidation-resistant, can resist corrosion of severe environments such as acid, alkali and salt, is excellent in performance and good in size stability, and is anchored into the rigid roadbed 4 and the flexible roadbed 2 to be not less than 500 mm.
As a preferred technical solution of the present invention, the flexible roadbed 2 includes cement-stabilized macadam 201 and mountain stone 202, the cement-stabilized macadam 201 is disposed at the bottom of the first glass fiber geogrid layer 103, the mountain stone 202 is disposed at the bottom of the cement-stabilized macadam 201, and the mountain stone 202 and the cement-stabilized macadam 201 together provide support for the road surface.
As a preferred technical scheme of the present invention, the first geotextile layer 301 and the second geotextile layer 502 are both made of synthetic fibers, the geomembrane layer 302 is made of polyethylene resin, and the combination of the geomembrane layer 302 and the first geotextile layer 301 can play a role in waterproofing and seepage prevention, so as to reduce water permeating into the flexible roadbed 2, thereby reducing the probability of road surface damage.
As a preferred technical solution of the present invention, the flexible roadbed 2 and the rigid roadbed 4 are both disposed at the bottom of the first fiberglass geogrid layer 103, the flexible roadbed 2 and the rigid roadbed 4 are both disposed at the top of the second fiberglass geogrid layer 501, and the first fiberglass geogrid layer 103 and the second fiberglass geogrid layer 501 are respectively bonded from the bottom and the top of the flexible roadbed 2 and the rigid roadbed 4.
As a preferred technical scheme of the utility model, the first glass fiber geogrid layer 103 and the second glass fiber geogrid layer 501 are coated on the surfaces of self-adhesive pressure-sensitive adhesive or modified asphalt, and the glass fiber geogrid coated on the surfaces of the self-adhesive pressure-sensitive adhesive or the modified asphalt has the advantages of glass fiber and compatibility with asphalt mixtures, so that the geogrid and an asphalt pavement are tightly combined into a whole, and the wear resistance and the shearing capability of the geogrid are greatly improved.
The working process of the utility model is as follows: leveling base soil, laying a second geotextile layer 502, wherein the geotextile is a water-permeable geosynthetic material formed by needling or weaving synthetic fibers, can effectively isolate the base soil from building materials, has certain drainage property and is beneficial to drainage of a rigid roadbed 4 and a flexible roadbed 2, laying a second glass fiber geogrid layer 501 on the second geotextile layer 502, laying a hill-skill stone 202 and reinforced concrete on the second glass fiber geogrid layer 501, laying cement stabilized macadam 201 on the hill-skill, laying an impermeable layer 3 between the flexible roadbed 2 and the rigid roadbed 4, wherein the impermeable layer 3 consists of a first geotextile layer 301 and a geomembrane layer 302, the geomembrane layer 302 is formed by adding a certain proportion of color master batch, an anti-aging agent, an antioxidant, an ultraviolet absorbent, a stabilizer and the like into polyethylene resin by blow molding, and the combination of the first geotextile layer 301 and the geomembrane layer 302 can play a role in water prevention and seepage prevention, the flexible roadbed 2 and the rigid roadbed 4 are paved with a first glass fiber geogrid layer 103, the first glass fiber geogrid layer 103 can increase the anti-reflection crack capability and strength of the surface layer 1, the first glass fiber geogrid layer 103 is paved with a steel-plastic geogrid layer 102, the steel-plastic geogrid layer 102 is formed into a composite high-strength tensile strip through extrusion by using high-strength steel wires and carrying out special treatment on the steel-plastic geogrid layer 102, polyethylene and other additives, the surface of the composite high-strength tensile strip is provided with rough embossing, the strength is high, and the deformation is small; creep is small; the high-strength flexible roadbed is corrosion-resistant, long in service life, ageing-resistant and oxidation-resistant, can resist corrosion of severe environments such as acid, alkali and salt, is excellent in performance and good in dimensional stability, can be matched with the first glass fiber geogrid layer 103, reduces the influence of temperature on interface connection strength, and overcomes the defect that the first glass fiber geogrid layer 103 is low in connection strength of the rigid roadbed 4, so that the connection strength of the flexible roadbed 2 and the rigid roadbed 4 is further improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A rigid subgrade to flexible subgrade interface, characterized by: the floor comprises a surface layer (1), wherein the surface layer (1) comprises an asphalt layer (101), a steel-plastic geogrid layer (102) and a first glass fiber geogrid layer (103), the steel-plastic geogrid layer (102) is arranged at the bottom of the asphalt layer (101), and the first glass fiber geogrid layer (103) is arranged at the bottom of the steel-plastic geogrid layer (102);
the flexible roadbed (2) is arranged at the bottom of the surface layer (1), an impermeable layer (3) is arranged on one side of the flexible roadbed (2), the impermeable layer (3) comprises a first geotextile layer (301) and a geomembrane layer (302), the first geotextile layer (301) is arranged on one side of the flexible roadbed (2), and the geomembrane layer (302) is arranged on one side, away from the flexible roadbed (2), of the first geotextile layer (301);
one side of geomembrane layer (302) is provided with rigid roadbed (4), the bottom of rigid roadbed (4) is provided with bottom (5), bottom (5) are including the fine geogrid layer of the second glass (501) and second geotechnological cloth layer (502), the bottom of rigid roadbed (4) is provided with the fine geogrid layer of the second glass (501), the bottom of the fine geogrid layer of the second glass (501) is provided with second geotechnological cloth layer (502).
2. A rigid subgrade to flexible subgrade interface according to claim 1, wherein: the steel-plastic geogrid layer (102) is made of high-strength steel wires, and the first glass fiber geogrid layer (103) is anchored into the rigid roadbed (4) and the flexible roadbed (2) and is not less than 500 mm.
3. A rigid subgrade to flexible subgrade interface according to claim 1, wherein: the flexible roadbed (2) comprises cement-stabilized macadam (201) and mountain skin stone (202), the bottom of the first glass fiber geogrid layer (103) is provided with the cement-stabilized macadam (201), and the bottom of the cement-stabilized macadam (201) is provided with the mountain skin stone (202).
4. A rigid subgrade to flexible subgrade interface according to claim 1, wherein: the first geotextile layer (301) and the second geotextile layer (502) are both made of synthetic fibers, and the geomembrane layer (302) is made of polyethylene resin.
5. A rigid subgrade to flexible subgrade interface according to claim 1, wherein: flexible road bed (2) and rigid road bed (4) all set up in the fine geogrid layer of first glass (103) bottom, flexible road bed (2) and rigid road bed (4) all set up in the top of the fine geogrid layer of second glass (501).
6. A rigid subgrade to flexible subgrade interface according to claim 1, wherein: the first glass fiber geogrid layer (103) and the second glass fiber geogrid layer (501) are coated on the surfaces of self-adhesive pressure-sensitive adhesive or modified asphalt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121423016.5U CN215947770U (en) | 2021-06-25 | 2021-06-25 | Rigid roadbed and flexible roadbed interface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121423016.5U CN215947770U (en) | 2021-06-25 | 2021-06-25 | Rigid roadbed and flexible roadbed interface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215947770U true CN215947770U (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121423016.5U Expired - Fee Related CN215947770U (en) | 2021-06-25 | 2021-06-25 | Rigid roadbed and flexible roadbed interface |
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| Country | Link |
|---|---|
| CN (1) | CN215947770U (en) |
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2021
- 2021-06-25 CN CN202121423016.5U patent/CN215947770U/en not_active Expired - Fee Related
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Granted publication date: 20220304 |