CN114960342A - Road curb filling structure and construction method - Google Patents
Road curb filling structure and construction method Download PDFInfo
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- CN114960342A CN114960342A CN202210845249.7A CN202210845249A CN114960342A CN 114960342 A CN114960342 A CN 114960342A CN 202210845249 A CN202210845249 A CN 202210845249A CN 114960342 A CN114960342 A CN 114960342A
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- 239000000463 material Substances 0.000 claims abstract description 49
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- 239000012530 fluid Substances 0.000 claims abstract description 21
- 239000010410 layer Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 238000013461 design Methods 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims description 24
- 239000002699 waste material Substances 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 6
- 238000007790 scraping Methods 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 4
- 238000002360 preparation method Methods 0.000 claims description 4
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- 239000004575 stone Substances 0.000 claims description 4
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- 239000000843 powder Substances 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 239000011232 storage material Substances 0.000 claims description 3
- 239000010902 straw Substances 0.000 claims description 3
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- 238000005056 compaction Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 2
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
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Images
Classifications
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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
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/221—Kerbs or like edging members, e.g. flush kerbs, shoulder retaining means ; Joint members, connecting or load-transfer means specially for kerbs
- E01C11/222—Raised kerbs, e.g. for sidewalks ; Integrated or portable means for facilitating ascent or descent
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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
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/224—Surface drainage of streets
-
- 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
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/50—Removable forms or shutterings for road-building purposes; Devices or arrangements for forming individual paving elements, e.g. kerbs, in situ
- E01C19/502—Removable forms or shutterings, e.g. side forms; Removable supporting or anchoring means therefor, e.g. stakes
- E01C19/506—Removable forms or shutterings, e.g. side forms; Removable supporting or anchoring means therefor, e.g. stakes for kerbs, gutters or similar structures, e.g. raised portions, median barriers
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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
- E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
- E01C23/03—Arrangements for curing paving; Devices for applying curing means; Devices for laying prefabricated underlay, e.g. sheets, membranes; Protecting paving under construction or while curing, e.g. use of tents
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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
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a curb filling structure and a construction method, the curb filling structure comprises a road base layer and a pavement surface layer, wherein a curb filling groove is arranged on the road base layer and is connected with the side part of the pavement surface layer, a guard plate is arranged on one side of the curb filling groove, which is far away from the side part of the pavement surface layer, a curb filling body is filled in the curb filling groove, the curb filling body is formed by filling a fluid filling material along the curb filling groove, the fluid filling material is formed by mixing a base material, a curing agent and a proper amount of water, and an anti-seepage film is wrapped on the upper surface of the curb filling body and the side close to the guard plate; in general, the invention has the advantages of reasonable structural design, easy construction, no compaction, strong water resistance and stability, environmental protection and wide application prospect.
Description
Technical Field
The invention relates to the technical field of road construction, in particular to a road curb filling structure and a construction method.
Background
In the construction of highways, because concrete curb structures or stone curb structures have higher cost, the roadside curb structures of roads are usually backfilled and compacted or tamped by backfill materials such as plain soil, lime soil and the like, but because the two sides of the roads are closely attached to road guardrails, the operation space is narrow, the traditional backfill materials are difficult to backfill and compact or tamp, the construction difficulty is higher, the backfilling period is longer, and the curb structures and the road surface layer are easy to subside when meeting water, so that slab staggering is formed between the curb structures and the road surface layer, and potential safety hazards are brought to road driving. And because the compaction degree or the tamping degree of the joint part of the curb structure and the road surface course backfilled by the traditional backfill material is insufficient, the tight joint degree of the curb structure and the side part of the road surface course backfilled by the traditional backfill material is not high, when the curb structure and the side part of the road surface course are washed by rain, the rain easily washes the road base layer along the joint part of the curb structure and the side part of the road surface course, the road surface is collapsed when the rain is washed, the service performance of the road is reduced, and the later-period operation and maintenance cost is increased.
Disclosure of Invention
The invention mainly aims to provide a road curb filling structure and a construction method, which are easy to construct, free of compaction, reasonable in structure, green, economical and environment-friendly and capable of improving the water resistance and stability of a curb.
In order to achieve the purpose, the invention provides a road edge filling structure which comprises a road base layer and a pavement surface layer, wherein a road edge filling groove is formed in the road base layer and is connected with the side part of the pavement surface layer, a protection plate is arranged on one side, away from the side part of the pavement surface layer, of the road edge filling groove, a road edge filling body is filled in the road edge filling groove, the road edge filling body is formed by filling a fluid filling material along the road edge filling groove, the fluid filling material is formed by mixing a base material, a curing agent and a proper amount of water, and an anti-seepage film is wrapped on the upper surface of the road edge filling body and the side, close to the protection plate, of the road edge filling body.
Further, still include the guardrail, the guardrail with the backplate outside is connected.
Further, the base material is one or more of waste foundation soil, engineering residue soil, silt, mucky soil, clay, silt, sandy soil, mixed soil, engineering mud, shield residue soil, construction waste regenerated micro powder, tailings or stone chips, and the particle size of the base material is less than or equal to 25 mm.
Furthermore, the flow expansion degree of the fluid filling material is 100 mm-300 mm, the 28d unconfined compressive strength is 0.1 MPa-2 MPa, and the permeability coefficient is less than or equal to 1 multiplied by 10 -5 cm/s。
The invention also provides a construction method of the road edge filling structure, which comprises the following steps:
s1, construction preparation;
s2, measuring the sidelines and elevations of the lofting curb filling structure along the two sides of the road, and excavating curb filling grooves;
s3, supporting guard plates far away from the road side in the curb filling grooves, wherein the upper surfaces of the guard plates are lower than the upper surfaces of the road surface layers;
s4, paving an anti-seepage film along the length direction of the curb filling groove, adhering the anti-seepage film to the inner side surface of the whole guard plate, adhering the lower edge of the anti-seepage film to the bottom of the curb filling groove, wherein the adhering width is not less than 5cm, and temporarily paving the upper edge of the anti-seepage film outside the guard plate;
s5, putting the base material, the curing agent and the water which are weighed according to the mixing proportion into a vibration stirrer for vibration mixing for not less than 60S, wherein the vibration frequency of the vibration stirrer is not less than 25 Hz; sampling and testing the fluidity expansion degree, obtaining a finished product when the fluidity expansion degree reaches a design value, conveying the finished product fluid filling material to a filling place to fill into a curb filling groove, and automatically leveling to a planned elevation by adopting segmented continuous filling to form a curb filling body;
s6, after the surface of the curb filling is solidified, scraping the place exceeding the standard elevation in time, and filling the fluid filling again to make the place lower than the standard elevation reach the standard elevation; one end of the upper surface of the curb filling body is flush with the upper surface of the pavement surface layer, the other end of the upper surface of the curb filling body is flush with the upper surface of the guard plate, and the upper surface of the curb filling body is inclined downwards from one end close to the pavement surface layer to one end close to the upper surface of the guard plate;
s7, when free water on the upper surface of the curb filling body disappears, laying the upper edge of the anti-seepage film temporarily laid on the outer side of the guard plate on the upper surface of the curb filling body, wherein the anti-seepage film completely covers the upper surface of the curb filling body and no air bubbles exist between the anti-seepage film and the upper surface of the curb filling body;
and S8, paving covering soil above the impermeable film, and watering and maintaining according to requirements.
Furthermore, the maintenance time is not less than 7d, and during winter construction, the curb filling body is covered and maintained by adopting heat preservation and heat storage materials such as straw curtains and cotton quilts on the upper part of the covering soil.
The invention has the following technical effects or advantages:
1. the curb filling structure is formed by mixing materials such as base materials and the like into a fluid filling material, so that the resource utilization of waste materials is realized, the structure is reasonable, the bearing capacity is certain, the compaction is avoided, the problems that a curb filling area of a road is narrow and small, the curb filling area is difficult to tamp, and the curb filling structure cannot be constructed by using machines are solved, the construction efficiency is greatly improved, the construction cost is reduced, and the curb filling structure is green, economical and environment-friendly;
2. the upper surface of the curb filling body is an inclined plane, so that accumulated water on a road can be conveniently discharged to the outer side of the curb structure of the road, the curb filling body has strong water resistance and stability, is high in tightness degree of combination with the side part of the pavement layer, does not settle when meeting water, is resistant to scouring, and well solves the problems that the traditional curb structure is easy to settle when meeting water and is easy to be scoured by rainwater to cause potential safety hazards;
3. a guard plate is arranged on one side of the curb filling groove, which is far away from the side part of the pavement surface layer, so that the overflow of the fluid filling material during pouring can be avoided; the upper surface of the curb filling body and the side part close to the guard plate are wrapped with the anti-seepage films, so that the dry-wet alternation of the surface of the curb filling body can be reduced, cracks derived from drying shrinkage of the curb filling body caused by too fast evaporation of water in the fluid filling material are prevented, and the service life of the curb filling body is prolonged;
in general, the road curb filling structure is reasonable in design, easy to construct, free of compaction, high in water resistance and stability, green, economical, environment-friendly and wide in application prospect.
Drawings
FIG. 1 is a schematic view of a road curb filling structure according to the present invention;
FIG. 2 is a flow chart of a construction method of the road curb filling structure of the present invention;
in the figure: 1. the road comprises a road base layer, 2 a pavement surface layer, 3 a curb filling groove, 4 a curb filling body, 5 a guardrail, 6 a guard plate, 7 and an impermeable film.
Detailed Description
The following detailed description of the preferred embodiments will be made with reference to the accompanying drawings.
As shown in fig. 1, a road edge filling structure comprises a road base layer 1 and a pavement surface layer 2, wherein a road edge filling groove 3 is dug on two sides of the road base layer 1, the road edge filling groove 3 is close to the side part of the pavement surface layer 3, a protective plate 6 is supported on one side of the road edge filling groove 3 away from the side part of the pavement surface layer 3, the outer side surface of the protective plate 6 is close to a guardrail 5 and is fixedly connected with the guardrail 5 through a rivet or an iron wire, a road edge filling body 4 is filled in the road edge filling groove 3, the road edge filling body 4 is formed by filling fluid filling along the road edge filling groove 3, an anti-seepage film 7 is wrapped on the upper surface of the road edge filling body 4 and the side close to the protective plate 6, the anti-seepage film 7 adopts anti-seepage geotextile or a plastic film, the anti-seepage film 7 can reduce the cold and hot alternation phenomenon on the surface of the road edge filling body 4, and prevent the water in the fluid filling body from evaporating quickly to cause drying and shrinking to generate cracks, the life of the curb filling 7 is improved.
The flow-state filling material is formed by mixing a base material, a curing agent and a proper amount of water through a stirrer, wherein the base material is one or more of waste foundation soil, engineering muck, silt, mucky soil, clay, silt, sandy soil, mixed soil, engineering mud, shield muck, construction waste regenerated micro powder, tailings or stone chips, the particle size of the base material is less than or equal to 25mm, the base material is used as a raw material of the flow-state filling material, the solid waste is recycled, the cost of road curb filling structure materials can be effectively reduced, the development requirement of green and low carbon is met, and according to the application, the flow-state filling material is prepared by mixing the base material, the curing agent and a proper amount of water through a stirrerThe curing agent adopts one or more of cement, lime and other composite inorganic cementing materials, the flow expansion degree of the fluid filling material after being mixed by a mixer is 100 mm-300 mm, the 28d unconfined compressive strength is 0.1 MPa-2 MPa, and the permeability coefficient is less than or equal to 1 multiplied by 10 -5 cm/s, curb filling structure is by material such as matrix mix become the molding of attitude filling material filling, realize waste material resource utilization, rational in infrastructure, possess certain bearing capacity, exempt from to compact, solved the regional narrow and small difficult problem that is difficult to tamp and can't use mechanical construction of curb filling, construction efficiency has been improved by a wide margin, construction cost is reduced, green economy environmental protection, and curb filling 4 has stronger water proofness and stability, it is high to combine inseparable degree with 2 lateral parts of road surface course, it is not subsiding to meet water, it is resistant to erode, fine solution traditional curb structure meet water and easily subside, easily receive the difficult problem that the rainwater erodees and arouse road safety hidden danger.
As shown in fig. 1 and 2, a construction method of a road edge filling structure includes the following steps:
s1, construction preparation, wherein various conditions are investigated according to engineering requirements, a corresponding construction scheme is formulated before construction, raw materials are detected and trial-assembled, the mixing ratio is determined, and required production equipment, test instruments, construction equipment and the like are installed and debugged;
s2, after side lines and elevations of the lofting curb filling structure are measured along two sides of a road, excavating curb filling grooves 3 on a road base layer 1 along the length direction of the road, wherein the excavated curb filling grooves 3 are close to the side part of a pavement surface layer 2 and are excavated to a guardrail 5, the excavation depth of the curb filling grooves 3 is determined according to construction requirements, and the bottoms of the curb filling grooves 3 are as flat as possible;
s3, supporting the guard plate 6 far away from the road side in the curb filling groove 3, wherein the upper surface of the guard plate 6 is lower than the upper surface of the pavement surface layer 2 to facilitate drainage, the outer side surface of the guard plate 6 is close to the guardrail 5, and the guard plate 6 is fixedly connected with the guardrail 5 through rivets or iron wires to enhance the stability of the guard plate 6;
s4, paving an anti-seepage film 7 along the length direction of the curb filling groove 3, adhering the anti-seepage film 7 to the inner side surface of the whole guard plate 6, adhering the lower edge of the anti-seepage film 7 to the bottom of the curb filling groove 3, wherein the adhering width is not less than 5cm, so that the flow state filling material can be effectively prevented from flowing out of a gap between the guard plate 6 and the road base layer 1, folding the upper edge of the anti-seepage film 7, and temporarily paving the anti-seepage film 7 outside the guard plate 6 for later use;
s5, determining the mixing proportion according to the trial-mix result, putting the weighed base material, the weighed curing agent and water into a vibration stirrer for vibration mixing for not less than 60S, wherein the vibration frequency of the vibration stirrer is not less than 25Hz, and the vibration stirrer is adopted for vibration mixing of the mixture, so that the method has a good destructive effect on coagulation and agglomeration among particles in the mixture, can quickly make the mixture uniform, reduce the quality fluctuation in the preparation process of the fluid filling material, and improve the quality of the fluid filling material; sampling to test the flow expansion degree, placing a cylindrical barrel with an upper opening and a lower opening with the inner diameter of 75 +/-1 mm and the height of 150 +/-1 mm, the inner wall of the cylindrical barrel is smooth, the wall thickness of the cylindrical barrel is not less than 5mm, and two flush and smooth ends of the cylindrical barrel on a horizontal glass flat plate, placing the stirred flow filling material into the cylindrical barrel twice, uniformly inserting and tamping 5 times by using a tamping bar each time, scraping the mixture along the upper end surface of the cylindrical barrel by using a trowel, vertically pulling up the cylindrical barrel for one time, forming cakes on the glass flat plate after the mixture is collapsed, respectively measuring the diameter of the cakes in the maximum diameter direction and the vertical direction by using a steel ruler, accurately measuring the diameter to 5mm, wherein the average value of the two diameters is the flow expansion degree of the flow filling material mixture, obtaining a finished product when the measured flow expansion degree is 100-300 mm, simultaneously sampling to prepare a test piece cube of 70.7mm, maintaining for 28 days, testing unconfined compressive strength and permeability coefficient; transporting the finished product fluid filling material to a filling place through a concrete truck, filling the fluid filling material into a curb filling groove 3 through a chute, filling continuously in sections during filling, strictly forbidding adding water during filling, automatically leveling to a planned elevation, and forming a curb filling body 4;
s6, after the surface of the curb filling body 4 is solidified, scraping the place exceeding the standard elevation by a scraper in time, and filling the fluid filling material again to make the place lower than the standard elevation reach the standard elevation; during the scraping operation, one end of the upper surface of the curb filling body 4 is flush with the upper surface of the pavement surface layer 2, the other end of the upper surface of the curb filling body 4 is flush with the upper surface of the guard plate 6, so that the upper surface of the curb filling body 4 is inclined downwards from one end close to the pavement surface layer 2 to one end close to the upper surface of the guard plate 6 to form an inclined plane, and water accumulated on the pavement of the road is conveniently discharged along the upper surface of the curb filling body 4;
s7, when the free water on the upper surface of the curb filling body 4 disappears, laying the upper edge of the impermeable film 7 temporarily laid on the outer side of the guard plate 6 on the upper surface of the curb filling body 4, wherein the impermeable film 7 completely covers the upper surface of the curb filling body 4 and no air bubbles exist between the impermeable film 7 and the upper surface of the curb filling body 4;
and S8, paving covering soil above the anti-seepage film 7, and watering and maintaining according to construction requirements.
In addition, the maintenance time is not less than 7d, and during winter construction, the curb filling 4 is covered and maintained by heat preservation and heat storage materials such as straw curtains and cotton quilts on the upper part of the covering soil.
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 (6)
1. The utility model provides a road curb filling structure, includes road base layer and road surface layer, its characterized in that: the road base layer is provided with a curb filling groove, the curb filling groove is connected with the side part of the pavement surface layer, the curb filling groove is far away from one side of the side part of the pavement surface layer and is provided with a guard plate, a curb filling body is filled in the curb filling groove and is formed by filling a flow state filling material along the curb filling groove, the flow state filling material is formed by mixing a base material, a curing agent and a proper amount of water, and the upper surface of the curb filling body is close to the guard plate side and is wrapped with an anti-seepage film.
2. The road curb filling structure of claim 1, characterized in that: the guardrail is connected with the outer side of the guard plate.
3. The road curb filling structure of claim 1, characterized in that: the base material is one or more of waste foundation soil, engineering residue soil, silt, mucky soil, clay, silt, sandy soil, mixed soil, engineering mud, shield residue soil, construction waste regenerated micro powder, tailings or stone chips, and the particle size of the base material is less than or equal to 25 mm.
4. The road curb filling structure of claim 1, characterized in that: the flow expansion degree of the fluid filling material is 100 mm-300 mm, the 28d unconfined compressive strength is 0.1 MPa-2 MPa, and the permeability coefficient is less than or equal to 1 multiplied by 10 -5 cm/s。
5. A construction method of the road curb filling structure according to any one of claims 1 to 4, characterized in that:
the method comprises the following steps:
s1, construction preparation;
s2, measuring the sidelines and elevations of the lofting curb filling structure along the two sides of the road, and excavating curb filling grooves;
s3, supporting guard plates far away from the road side in the curb filling grooves, wherein the upper surfaces of the guard plates are lower than the upper surfaces of the road surface layers;
s4, paving an anti-seepage film along the length direction of the curb filling groove, adhering the anti-seepage film to the inner side surface of the whole guard plate, adhering the lower edge of the anti-seepage film to the bottom of the curb filling groove, wherein the adhering width is not less than 5cm, and temporarily paving the upper edge of the anti-seepage film outside the guard plate;
s5, putting the base material, the curing agent and the water which are weighed according to the mixing proportion into a vibration stirrer for vibration mixing for not less than 60S, wherein the vibration frequency of the vibration stirrer is not less than 25 Hz; sampling and testing the fluidity expansion degree, obtaining a finished product when the fluidity expansion degree reaches a design value, conveying the finished product fluid filling material to a filling place to fill into a curb filling groove, and automatically leveling to a planned elevation by adopting segmented continuous filling to form a curb filling body;
s6, after the surface of the curb filling is solidified, scraping the place exceeding the standard elevation in time, and filling the fluid filling again to make the place lower than the standard elevation reach the standard elevation; one end of the upper surface of the curb filling body is flush with the upper surface of the pavement surface layer, the other end of the upper surface of the curb filling body is flush with the upper surface of the guard plate, and the upper surface of the curb filling body is inclined downwards from one end close to the pavement surface layer to one end close to the upper surface of the guard plate;
s7, when free water on the upper surface of the curb filling body disappears, laying the upper edge of the anti-seepage film temporarily laid on the outer side of the guard plate on the upper surface of the curb filling body, wherein the anti-seepage film completely covers the upper surface of the curb filling body and no air bubbles exist between the anti-seepage film and the upper surface of the curb filling body;
and S8, paving covering soil above the impermeable film, and watering and maintaining according to requirements.
6. The construction method of a road curb filling structure of claim 5, characterized in that: the maintenance time is not less than 7d, and during winter construction, the curb filling body is covered and maintained by adopting heat preservation and heat storage materials such as straw curtains and cotton quilts on the upper part of the covering soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210845249.7A CN114960342A (en) | 2022-07-19 | 2022-07-19 | Road curb filling structure and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210845249.7A CN114960342A (en) | 2022-07-19 | 2022-07-19 | Road curb filling structure and construction method |
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| CN114960342A true CN114960342A (en) | 2022-08-30 |
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| CN202210845249.7A Pending CN114960342A (en) | 2022-07-19 | 2022-07-19 | Road curb filling structure and construction method |
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