CN113622248A - One-way fiber anti-cracking base layer structure and construction method - Google Patents
One-way fiber anti-cracking base layer structure and construction method Download PDFInfo
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- CN113622248A CN113622248A CN202111084982.3A CN202111084982A CN113622248A CN 113622248 A CN113622248 A CN 113622248A CN 202111084982 A CN202111084982 A CN 202111084982A CN 113622248 A CN113622248 A CN 113622248A
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- 239000000835 fiber Substances 0.000 title claims abstract description 109
- 238000005336 cracking Methods 0.000 title claims abstract description 38
- 238000010276 construction Methods 0.000 title claims abstract description 23
- 239000010410 layer Substances 0.000 claims abstract description 94
- 238000002156 mixing Methods 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000004568 cement Substances 0.000 claims abstract description 13
- 239000002689 soil Substances 0.000 claims abstract description 12
- 239000004575 stone Substances 0.000 claims abstract description 12
- 239000002344 surface layer Substances 0.000 claims abstract description 11
- 239000011384 asphalt concrete Substances 0.000 claims abstract description 10
- 229920002748 Basalt fiber Polymers 0.000 claims abstract description 7
- 239000004743 Polypropylene Substances 0.000 claims abstract description 7
- 239000003365 glass fiber Substances 0.000 claims abstract description 7
- -1 polypropylene Polymers 0.000 claims abstract description 7
- 229920001155 polypropylene Polymers 0.000 claims abstract description 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 6
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 6
- 239000004571 lime Substances 0.000 claims abstract description 6
- 235000019738 Limestone Nutrition 0.000 claims abstract description 4
- 239000011398 Portland cement Substances 0.000 claims abstract description 4
- 239000006028 limestone Substances 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 21
- 238000012423 maintenance Methods 0.000 claims description 16
- 238000005096 rolling process Methods 0.000 claims description 15
- 239000002994 raw material Substances 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 claims description 3
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- 239000011362 coarse particle Substances 0.000 claims description 3
- 238000005056 compaction Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
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- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
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- 238000010521 absorption reaction Methods 0.000 abstract description 4
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- 239000011440 grout Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C7/00—Coherent pavings made in situ
- E01C7/08—Coherent pavings made in situ made of road-metal and binders
- E01C7/18—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders
- E01C7/26—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre
- E01C7/262—Coherent pavings made in situ made of road-metal and binders of road-metal and bituminous binders mixed with other materials, e.g. cement, rubber, leather, fibre with fibrous material, e.g. asbestos; with animal or vegetal admixtures, e.g. leather, cork
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- Architecture (AREA)
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- Road Paving Structures (AREA)
Abstract
The invention relates to the technical field of road engineering base structures, and discloses a one-way fiber anti-cracking base structure and a construction method, wherein a pavement structure layer comprises an AC-13 fine grain type asphalt concrete upper surface layer with the thickness of 4cm, an AC-20 coarse grain type asphalt concrete lower surface layer with the thickness of 6cm, a cement-stabilized macadam base layer with the thickness of 18cm, one-way fibers, a solidified soil base layer with the thickness of 20cm and a 6% lime soil base layer, the one-way fibers are 3 cm-5 cm away from the top surface of the pavement base layer, the distance between the one-way fibers is 2.5 cm-3 cm, and the one-way fiber anti-cracking base structure comprises the following components: the cement is added by adopting a P.O 42.5 common portland cement external mixing method, the additive amount is 3%, the broken stone adopts limestone as aggregate, the water meets the national standard of engineering water, the fiber is basalt fiber, polypropylene fiber and glass fiber which are twisted into strips and bundles by continuous monofilaments, and the unidirectional fiber is implanted into the base layer, so that the connection between the fiber and the base body is gradually enhanced along with the increase of the age period, and the fiber and the base body are stressed together, therefore, the unidirectional fiber anti-cracking base layer has the advantages of good anti-cracking performance, stress absorption performance, high stability, quick construction and the like.
Description
Technical Field
The invention relates to the technical field of road engineering base structures, in particular to a unidirectional fiber anti-cracking base structure and a construction method.
Background
At present, a semi-rigid base layer is generally adopted in the structural design of a road base layer in China due to good compressive strength, fatigue resistance, certain rigidity and good water stability, but the semi-rigid base layer is easy to deform under the combined action of load and non-load so as to generate cracks and then reflect to a surface layer, thereby influencing the service life and comfort of a road, wherein the semi-rigid base layer is easy to generate transverse cracks under the combined action of running load and temperature drying shrinkage non-load, the generation of the transverse cracks is easy to damage the integrity and flatness of the road surface structure on one hand, influence the running safety and reduce the attractiveness of the road surface on the other hand, once the road surface is cracked, external moisture can permeate into the cracks and permeate to the top surface of the base layer, grout is generated under the action of running load, and the grout can cause the cracks to widen and further separate the surface layer from the base layer, interlayer continuity is seriously affected; the main mode for preventing cracks at home and abroad is to strengthen the self performance of a semi-rigid base material, or arrange a crack interlayer between a base layer and a surface layer, but the treatment effect is limited; in view of the above-mentioned current situation, there is a need for a unidirectional fiber anti-cracking base layer structure and a construction method thereof, which combine the anti-cracking performance of the reinforced base layer material with the crack stress dissipation function to solve or at least alleviate the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a unidirectional fiber anti-cracking base layer structure and a construction method, and aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a one-way fibre crack control basic unit structure, the structural layer divide into 4cm thick AC-13 granule formula asphalt concrete upper strata (1), 6cm thick AC-20 coarse grain formula asphalt concrete lower surface (2), 18cm thick cement stabilized macadam basic unit (3) and one-way fibre (6), 20cm thick solidification soil basic unit (4), 6% lime soil subbase (5) for the basic unit of road is more firm, is difficult to take place big displacement more and warp, reduces the cost of maintenance in later stage.
Preferably, the unidirectional fibers are 3 cm-5 cm away from the top surface of the pavement base layer, the distance between the unidirectional fibers is 2.5 cm-3 cm, and the unidirectional fibers and the pavement base layer jointly form a unidirectional fiber anti-cracking base layer structure.
Preferably, the unidirectional fiber anti-cracking infrastructure consists of the following components: the cement is added by adopting a P.O 42.5 common Portland cement external mixing method, and the addition amount is 3%. The crushed stone adopts limestone as aggregate, and the mineral aggregate is graded into coarse aggregate (9.5-13.5) mm: coarse aggregate (4.75-9.5) mm: fine aggregate (0-4.75) mm ═ 40%: 27%: 33 percent, the crushing value is less than or equal to 30 percent, the los Angeles abrasion value is less than or equal to 35 percent, the soft stone content is less than or equal to 5 percent, the needle flake content is less than or equal to 20 percent, and the dust content is less than or equal to 1 percent.
Preferably, the water meets the national standard of engineering water, when the water meets suspicious water sources, related departments should be entrusted with testing and identification, and the fibers should be basalt fibers, polypropylene fibers and glass fibers which are twisted into strips and bundles by continuous monofilaments.
Preferably, the diameter of the basalt fiber monofilament is 1.5-3.2 μm, the elongation at break is 1.5-3.2%, and the elastic modulus is 79-93 GPa.
Preferably, the diameter of the polypropylene fiber monofilament is 15-35 μm, the elongation at break is 10-15%, and the elastic modulus is 3.7-4.5 GPa, so that the longer the unidirectional limiting anti-cracking base layer structure is used, the stronger the connection between the fiber and the matrix is, and the better the anti-cracking performance of the base layer is.
Preferably, the diameter of the glass fiber monofilament is 10-30 microns, the elongation at break is 2.7-3.0%, the elastic modulus is 72-75 GPa, the structural form of the unidirectional fiber anti-cracking base layer is not limited to a road base layer, and the unidirectional fiber anti-cracking base layer is also suitable for other road engineering structural layers.
A construction method of a one-way fiber anti-cracking base layer structure comprises the following steps:
s1: construction preparation, namely cleaning sundries on the surface of a roadbed, ensuring that the roadbed surface is clean and tidy so as to be convenient for better base layer compaction, preparing cement, broken stone, fiber and water raw materials, detecting raw materials to meet requirements, using the raw materials, and simultaneously preparing the fiber to be implanted into a paver and a road roller machine for use;
s2: mixing and transporting the mixture, wherein a plant mixing method is preferably selected for mixing the mixture, the mixture is subjected to dosage control according to a production mixing ratio, the mixing time and the mixing temperature of the mixture are strictly controlled, and a transport vehicle which can be automatically unloaded and has good sealing property is selected during the transportation of the mixture so as to reduce the loss of moisture in the transportation process;
s3: paving a mixture and implanting unidirectional fibers, namely mounting one end of a single fiber bundle on a fiber implanting paver in a coiled manner, and moving the other end of the single fiber bundle out of an implanting device end of the fiber implanting paver and fixing the single fiber bundle on a steel chisel with scales inserted into a roadbed layer, wherein the fibers are randomly paved and implanted along the paver, the fibers are arranged at intervals of 2.5-3 cm along the width direction of the roadbed layer, the distance between each channel and the upper surface of the roadbed layer is 3-5 cm, and the loose paving thickness of the roadbed layer is determined according to a test section;
s4: rolling, wherein the rolling operation is finished within 2 hours after the mixture is mixed, the rolling is firstly stabilized for 2 times by a photo wheel road roller according to the principle that the outer side is overlapped with the inner side and the wheel track is overlapped by one half, after the pressure is stabilized, the vibration road roller re-presses and rolls for 3 to 4 times according to the principle that the micro vibration is firstly carried out, then the vibration is carried out, and the wheel track is overlapped by one half to one third, the specific rolling times are carried out according to the construction process determined by a field test section, after the re-pressing, the surface final-pressing and press-polishing treatment is carried out by the photo wheel road roller, and no wheel track is left after the rolling;
s5: and (4) maintaining, wherein any vehicle or pedestrian is forbidden to pass through the construction pavement during the maintenance of the base layer, and the daily watering amount is effectively controlled in the maintenance stage according to the weather condition, so that the good humidity of the base layer is ensured, and the roadbed maintenance is controlled to be more than 7 d.
The invention provides a unidirectional fiber anti-cracking base layer structure and a construction method. The method has the following beneficial effects:
(1) according to the invention, the unidirectional fibers are doped in the base layer, the connection between the fibers and the matrix is gradually enhanced along with the increase of the age, and the fibers and the matrix bear force together, so that the unidirectional fiber anti-cracking base layer has the advantages of good anti-cracking performance, stress absorption performance, high stability, rapid construction and the like.
(2) According to the invention, the unidirectional fiber is implanted into the base layer, so that the problem of transverse cracks generated in the road can be effectively solved, the later maintenance cost is greatly reduced, and meanwhile, the structural form of the unidirectional fiber anti-cracking base layer is also suitable for other structural layers of the road engineering.
(3) According to the invention, the solidified soil base layer is arranged below the cement stabilized macadam base layer, so that the base layer of the road is more stable, large displacement deformation is less likely to occur, and the later maintenance cost is reduced.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a unidirectional fiber anti-cracking base layer structure of the invention.
In the figure: an AC-13 fine particle type asphalt concrete upper surface layer with the thickness of 1-4cm, an AC-20 coarse particle type asphalt concrete lower surface layer with the thickness of 2-6cm, a cement stabilized macadam base layer with the thickness of 3-18cm, a solidified soil base layer with the thickness of 4-20cm, a lime soil base layer with the thickness of 5-6% and 6-unidirectional fibers.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
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 invention 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 invention. 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; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
As shown in fig. 1, the present invention provides a technical solution: a one-way fiber anti-cracking base layer structure is characterized in that a pavement structure layer is divided into a 4 cm-thick AC-13 fine particle type asphalt concrete upper surface layer 1, a 6 cm-thick AC-20 coarse particle type asphalt concrete lower surface layer 2, an 18 cm-thick cement-stabilized macadam base layer 3, one-way fibers 6, a 20 cm-thick solidified soil base layer 4 and a 6% lime soil base layer 5, the one-way fibers 6 are located 3 cm-5 cm away from the top surface of the 18 cm-thick cement-stabilized macadam base layer 3, the distance between the one-way fibers 4 is 2.5 cm-3 cm, the one-way fibers 6 and the 18 cm-thick cement-stabilized macadam base layer 3 jointly form the one-way fiber anti-cracking base layer structure, and the one-way fiber anti-cracking base layer structure consists of the following components: the cement, the broken stone, the water, the fiber and the cement are added by adopting a P.O 42.5 common Portland cement external mixing method, and the addition amount is 3 percent. Crushing stone, namely, taking limestone as aggregate, and grading mineral aggregate into coarse aggregate (9.5-13.5) mm: coarse aggregate (4.75-9.5) mm: fine aggregate (0-4.75) mm ═ 40%: 27%: 33 percent, the crushing value is less than or equal to 30 percent, the los Angeles abrasion value is less than or equal to 35 percent, the soft stone content is less than or equal to 5 percent, the needle flake content is less than or equal to 20 percent, the dust content is less than or equal to 1 percent, water meets the engineering water of national standard and meets the suspected water source, the fiber is required to be tested and identified by related departments, the fiber is basalt fiber, polypropylene fiber and glass fiber which are twisted into a strip bundle by continuous filaments, wherein the diameter of each basalt fiber filament is 1.5-3.2 mu m, the breaking elongation is 1.5-3.2 percent, the elastic modulus is 79-93 GPa, the diameter of each polypropylene fiber filament is 15-35 mu m, the breaking elongation is 10-15 percent, the elastic modulus is 3.7-4.5 GPa, the diameter of each glass fiber filament is 10-30 mu m, the breaking elongation is 2.7-3.0 percent, the elastic modulus is 72-75 GPa, and the anti-cracking structural form of the unidirectional fiber base layer is not limited to the road base layer, and is also suitable for other road engineering structural layers.
A construction method of a one-way fiber anti-cracking base layer structure comprises the following steps:
s1: construction preparation, namely cleaning sundries on the surface of a roadbed, ensuring that the roadbed surface is clean and tidy so as to be convenient for better base layer compaction, preparing cement, broken stone, fiber and water raw materials, detecting raw materials to meet requirements, using the raw materials, and simultaneously preparing the fiber to be implanted into a paver and a road roller machine for use;
s2: mixing and transporting the mixture, wherein a plant mixing method is preferably selected for mixing the mixture, the mixture is subjected to dosage control according to a production mixing ratio, the mixing time and the mixing temperature of the mixture are strictly controlled, and a transport vehicle which can be automatically unloaded and has good sealing property is selected during the transportation of the mixture so as to reduce the loss of moisture in the transportation process;
s3: paving a mixture and implanting unidirectional fibers, namely mounting one end of a single fiber bundle on a fiber implanting paver in a coiled manner, and moving the other end of the single fiber bundle out of an implanting device end of the fiber implanting paver and fixing the single fiber bundle on a steel chisel with scales inserted into a roadbed layer, wherein the fibers are randomly paved and implanted along the paver, the fibers are arranged at intervals of 2.5-3 cm along the width direction of the roadbed layer, the distance between each channel and the upper surface of the roadbed layer is 3-5 cm, and the loose paving thickness of the roadbed layer is determined according to a test section;
s4: rolling, wherein the rolling operation is finished within 2 hours after the mixture is mixed, the rolling is firstly stabilized for 2 times by a photo wheel road roller according to the principle that the outer side is overlapped with the inner side and the wheel track is overlapped by one half, after the pressure is stabilized, the vibration road roller re-presses and rolls for 3 to 4 times according to the principle that the micro vibration is firstly carried out, then the vibration is carried out, and the wheel track is overlapped by one half to one third, the specific rolling times are carried out according to the construction process determined by a field test section, after the re-pressing, the surface final-pressing and press-polishing treatment is carried out by the photo wheel road roller, and no wheel track is left after the rolling;
s5: and (4) maintaining, wherein any vehicle or pedestrian is forbidden to pass through the construction pavement during the maintenance of the base layer, and the daily watering amount is effectively controlled in the maintenance stage according to the weather condition, so that the good humidity of the base layer is ensured, and the roadbed maintenance is controlled to be more than 7 d.
When using, through doping one-way fiber 4 in road surface basic unit 3, increase along with the age, one-way fiber 4 is connected with the base member and is strengthened gradually, one-way fiber 4 and base member atress jointly, consequently, 4 crack control basic units of one-way fiber have good crack resistance, stress absorption performance, stability is high, advantages such as construction is swift, can effectually produce the transverse crack problem in the solution road, very big reduction later stage cost of maintenance, 4 crack control basic unit structural style of one-way fiber also is applicable to other structural layers of road engineering simultaneously, through setting up sand bed 6 in the below on lime soil layer 5, grit layer 7, make the ground of road more firm, be difficult to take place the skew on the position more, reduce the cost of maintenance in later stage.
In conclusion, the unidirectional fibers 6 are implanted into the cement stabilized macadam base layer 3 with the thickness of 18cm, the connection between the unidirectional fibers 6 and the base body is gradually enhanced along with the increase of the age, the unidirectional fibers 6 and the base body bear force jointly, so the unidirectional fiber 6 anti-cracking base layer has the advantages of good anti-cracking performance, stress absorption performance, high stability, rapid construction and the like, the problem of transverse cracks in a road can be effectively solved, the later maintenance cost is greatly reduced, meanwhile, the unidirectional fiber 6 anti-cracking base layer is also suitable for other structural layers of road engineering, the base layer of the road is more stable due to the structure, large displacement deformation is less prone to occurring, and the later maintenance cost is reduced.
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 invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a one-way fibre crack control infrastructure which characterized in that: the pavement structure layer comprises an AC-13 fine particle type asphalt concrete upper surface layer (1) with the thickness of 4cm, an AC-20 coarse particle type asphalt concrete lower surface layer (2) with the thickness of 6cm, a cement-stabilized macadam base layer (3) with the thickness of 18cm, a unidirectional fiber (6), a solidified soil base layer (4) with the thickness of 20cm and a 6% lime soil base layer (5).
2. A unidirectional fiber anti-cracking infrastructure as claimed in claim 1, wherein: the unidirectional fibers (6) are 3 cm-5 cm away from the top surface of the cement-stabilized macadam base layer (3) with the thickness of 18cm, the distance between the unidirectional fibers (6) is 2.5 cm-3 cm, and the unidirectional fibers (4) and the cement-stabilized macadam base layer (3) with the thickness of 18cm jointly form a unidirectional fiber anti-cracking base layer structure main body.
3. A unidirectional fibrous crack resistant infrastructure as claimed in claim 2 consisting of: cement, broken stone, water and fiber, which is characterized in that the cement is added by adopting a P.O 42.5 ordinary portland cement external mixing method, the addition amount is 3 percent,
the crushed stone adopts limestone as aggregate, and the mineral aggregate is graded into coarse aggregate (9.5-13.5) mm: coarse aggregate (4.75-9.5) mm: fine aggregate (0-4.75) mm = 40%: 27%: 33 percent, the crushing value is less than or equal to 30 percent, the los angeles abrasion value is less than or equal to 35 percent, the soft stone content is less than or equal to 5 percent, the needle flake content is less than or equal to 20 percent, and the dust content is less than or equal to 1 percent.
4. A unidirectional fiber anti-cracking infrastructure as claimed in claim 3, wherein: the water meets the national standard of engineering water, and when the water meets suspicious water sources, related departments should be entrusted with testing and identification, and the fibers should be basalt fibers, polypropylene fibers and glass fibers which are twisted into strips and bundles by continuous monofilaments.
5. A unidirectional fiber anti-cracking infrastructure as claimed in claim 4, wherein: the basalt fiber monofilament has the diameter of 1.5-3.2 microns, the elongation at break of 1.5-3.2 percent and the elastic modulus of 79-93 GPa.
6. A unidirectional fiber anti-cracking infrastructure as claimed in claim 4, wherein: the diameter of the polypropylene fiber monofilament is 15-35 mu m, the breaking elongation is 10-15%, and the elastic modulus is 3.7-4.5 GPa.
7. A unidirectional fiber anti-cracking infrastructure as claimed in claim 4, wherein: the glass fiber monofilament has the diameter of 10-30 mu m, the breaking elongation of 2.7-3.0% and the elastic modulus of 72-75 GPa, and the structural form of the unidirectional fiber anti-cracking base layer is not limited to a road base layer and is also suitable for other road engineering structural layers.
8. The construction method of the unidirectional fiber anti-cracking infrastructure as claimed in claims 1-7, characterized by comprising the following steps:
s1: construction preparation, namely cleaning sundries on the surface of a roadbed, ensuring that the roadbed surface is clean and tidy so as to be convenient for better base layer compaction, preparing cement, broken stone, fiber and water raw materials, detecting raw materials to meet requirements, using the raw materials, and simultaneously preparing the fiber to be implanted into a paver and a road roller machine for use;
s2: mixing and transporting the mixture, wherein a plant mixing method is preferably selected for mixing the mixture, the mixture is subjected to dosage control according to a production mixing ratio, the mixing time and the mixing temperature of the mixture are strictly controlled, and a transport vehicle which can be automatically unloaded and has good sealing property is selected during the transportation of the mixture so as to reduce the loss of moisture in the transportation process;
s3: paving a mixture and implanting unidirectional fibers, wherein one end of a single fiber bundle is installed on a fiber implanting paver in a coiled manner, the other end of the single fiber bundle migrates out of an implanting device end of the fiber implanting paver and is fixed on a steel chisel with scales in an inserted roadbed layer, the fibers are randomly paved and implanted along with the paver, the fibers are arranged at intervals of 2.5 cm-3 cm along the width direction of the roadbed layer, each interval is 3 cm-5 cm away from the upper surface of the roadbed layer, and the loose pavement thickness of the roadbed layer is determined according to a test section;
s4: rolling, wherein the rolling operation is finished within 2 hours after the mixture is mixed, the rolling is firstly stabilized for 2 times by a photo wheel road roller according to the principle that the outer side is overlapped with the inner side and the wheel track is overlapped by one half, after the pressure is stabilized, the vibration road roller re-presses and rolls for 3 to 4 times according to the principle that the micro vibration is firstly carried out, then the vibration is carried out, and the wheel track is overlapped by one half to one third, the specific rolling times are carried out according to the construction process determined by a field test section, after the re-pressing, the surface final-pressing and press-polishing treatment is carried out by the photo wheel road roller, and no wheel track is left after the rolling;
s5: and (4) maintaining, wherein any vehicle or pedestrian is forbidden to pass through the construction pavement during the maintenance of the base layer, and the daily watering amount is effectively controlled in the maintenance stage according to the weather condition, so that the good humidity of the base layer is ensured, and the roadbed maintenance is controlled to be more than 7 d.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111084982.3A CN113622248A (en) | 2021-09-16 | 2021-09-16 | One-way fiber anti-cracking base layer structure and construction method |
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| CN202111084982.3A CN113622248A (en) | 2021-09-16 | 2021-09-16 | One-way fiber anti-cracking base layer structure and construction method |
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| CN113622248A true CN113622248A (en) | 2021-11-09 |
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Application publication date: 20211109 |