CN110820466A - Quick repairing method for cement concrete pavement - Google Patents
Quick repairing method for cement concrete pavement Download PDFInfo
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- CN110820466A CN110820466A CN201911202783.0A CN201911202783A CN110820466A CN 110820466 A CN110820466 A CN 110820466A CN 201911202783 A CN201911202783 A CN 201911202783A CN 110820466 A CN110820466 A CN 110820466A
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- 239000004567 concrete Substances 0.000 title claims abstract description 116
- 239000004568 cement Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 26
- 239000010410 layer Substances 0.000 claims abstract description 51
- 239000002344 surface layer Substances 0.000 claims abstract description 51
- 239000011382 roller-compacted concrete Substances 0.000 claims abstract description 33
- 201000010099 disease Diseases 0.000 claims abstract description 15
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 claims abstract description 15
- 238000004381 surface treatment Methods 0.000 claims abstract description 13
- 238000003825 pressing Methods 0.000 claims description 25
- 239000010426 asphalt Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 14
- 239000003973 paint Substances 0.000 claims description 6
- 238000005553 drilling Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 230000008439 repair process Effects 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- 238000010276 construction Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 238000005096 rolling process Methods 0.000 description 6
- 230000003068 static effect Effects 0.000 description 6
- 238000005056 compaction Methods 0.000 description 4
- 239000011150 reinforced concrete Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 238000007605 air drying Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 239000007943 implant Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
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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
- E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
- E01C7/14—Concrete paving
- E01C7/147—Repairing concrete pavings, e.g. joining cracked road sections by dowels, applying a new concrete covering
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Repair (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a quick repairing method of a cement concrete pavement, which comprises the following steps: determining a surface treatment range according to the disease condition of the concrete pavement; breaking the surface layer of the concrete slab within the surface layer treatment range; determining the pavement base layer breaking range by taking the surface layer breaking boundary as a reference; breaking the pavement base structure within the pavement base breaking range; pouring low-grade concrete in the pavement base breaking range to serve as a new pavement base structure; sequentially and transversely arranging pull rods on the boundary of the original concrete pavement along the circumferential direction; paving a waterproof layer on the low-grade concrete of the pavement base; pouring a roller compacted concrete surface layer in the surface layer treatment range; and after the concrete is cured to meet the requirements, filling joints between the new concrete surface layer and the old concrete surface layer. The method has the advantages of realizing rapid repair of concrete pavement diseases, ensuring the strength of a pavement structure, rapidly opening traffic and reducing the influence on municipal traffic.
Description
Technical Field
The invention relates to a quick repairing method for a cement concrete pavement.
Background
The cement concrete pavement is a pavement which takes cement concrete as a main material to make a surface layer, is called a concrete pavement for short, and is a high-grade pavement. The concrete pavements commonly used at present comprise plain concrete, reinforced concrete, continuous reinforced concrete, prestressed concrete, steel fiber concrete, fabricated concrete and the like. The cement concrete road surface has the characteristics of long service life and adaptability to heavy traffic, but once the concrete road surface is damaged, the cement concrete road surface can be developed rapidly, and the repair of the cement concrete road surface is more difficult than that of an asphalt road surface.
The concrete pavement damage maintenance generally adopts structures such as plain concrete, reinforced concrete and the like to recover, the traffic needs to be closed in the period, the concrete strength can be reached and the traffic is opened only after at least 21 days according to the concrete maintenance period, the traffic is opened when the actual traffic pressure is forced, the traffic is opened usually about 7 days after the concrete is poured, the concrete strength does not reach the design strength at the moment, new diseases are generated through the repeated action of vehicle load, and the steps are repeated so as to form vicious circle.
In the maintenance of the road surface in the urban area, because the vehicles coming and going are frequent and the traffic is busy in the downtown area, the long-time closed construction cannot be adopted, in order to shorten the construction period, accelerate the construction progress and reduce the influence on the traffic, the strength of the roller compacted concrete is used for repairing the concrete road surface, the speed of the strength of the roller compacted concrete is higher than that of the common concrete, the maintenance period can be shortened, and the traffic is opened in advance, so that the method is an effective way for quickly repairing the concrete road surface and opening the traffic.
Disclosure of Invention
The invention aims to solve the technical problem of providing a quick repairing method of a cement concrete pavement aiming at the defects in the prior art, so that the defects of the concrete pavement are quickly repaired, the strength of the pavement structure is ensured, the traffic is quickly opened, and the influence on municipal traffic is reduced.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a quick repairing method for a cement concrete pavement comprises the following steps:
1) determining a surface treatment range according to the disease condition of the concrete pavement, wherein the surface treatment range is enlarged by L2 compared with the boundary position of the actual disease;
2) after the treatment range is determined, breaking the surface layer of the concrete slab within the surface layer treatment range;
3) determining the pavement base layer breaking range by taking the surface layer breaking boundary as a reference, wherein the base layer breaking boundary is smaller than the surface layer boundary by L1;
4) after the pavement base layer breaking range is determined, breaking the pavement base layer structure in the pavement base layer breaking range;
5) pouring low-grade concrete in the pavement base breaking range to serve as a new pavement base structure;
6) sequentially and transversely arranging pull rods on the boundary of the original concrete pavement along the circumferential direction;
7) paving a waterproof layer on the low-grade concrete of the pavement base;
8) pouring a roller compacted concrete surface layer in the surface layer treatment range;
9) and after the concrete is cured to meet the requirements, filling joints between the new concrete surface layer and the old concrete surface layer.
According to the technical scheme, in the step 1), the L2 is 40-60 cm.
According to the technical scheme, in the step 3), the L1 is 20-30 cm.
According to the technical scheme, in the step 5), the low-grade concrete is C15, C20 or C25.
According to the technical scheme, in the step 6), the mode of arranging the pull rod is drilling and bar planting.
According to the technical scheme, in the step 7), the waterproof layer is SBS modified emulsified asphalt waterproof paint.
According to the technical scheme, the roller compacted concrete surface layer is poured in the step 8), the processes of primary pressing, secondary pressing and final pressing of the roller compacted concrete are completed, and then short-time curing can be carried out.
According to the technical scheme, in the step 9), the joint filling material is modified asphalt.
The invention has the following beneficial effects:
for urban road maintenance, which is often in a section with busy traffic, a common concrete pavement or a reinforced concrete pavement is adopted for repair, and great inconvenience is brought to people for going out due to a long maintenance period, so that the method has the main advantages that: firstly, the roller compacted concrete is selected as a pavement material, and on the premise of ensuring the structural strength, the strength of the roller compacted concrete is increased faster than that of the common concrete because the water consumption of the roller compacted concrete is much lower than that of the common concrete, and the maintenance period can be shortened to open traffic in advance. In addition, the construction technology of the roller compacted concrete pavement is simpler and more convenient than the construction technology of common concrete, the construction progress can be accelerated, and meanwhile, the roller compacted concrete construction machinery has a series of advantages of good universality, high construction speed, high early strength, cement saving, few joints and the like. Secondly, the pavement base layer adopts low-grade concrete, can reach the strength in a short curing period, and simultaneously provides better stress conditions for the rigidity transition of the roadbed and the roller compacted concrete surface layer. And steps are formed between the road surface base layer and the roller compacted concrete, and meanwhile, the SBS modified emulsified asphalt waterproof coating is adopted, so that water can be well prevented from entering a roadbed to cause various damages, concrete pavement diseases can be quickly repaired, the strength of a pavement structure is ensured, traffic is quickly opened, and the influence on municipal traffic is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a concrete pavement damaged after being rapidly repaired in the embodiment of the invention;
FIG. 2 is a partial K view of FIG. 1;
in the figure, 1-a current subbase layer, 2-a pavement base layer, 3-C20 lean concrete layer, 4-a roller compacted concrete surface layer, 5-a pull rod, 6-a new and old concrete surface layer boundary line and 7-SBS modified emulsified asphalt waterproof paint.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Referring to fig. 1 to 2, in one embodiment of the present invention, a method for quickly repairing a cement concrete pavement is provided, which includes the following steps:
1) determining a surface treatment range according to the disease condition of the concrete pavement, wherein the surface treatment range is enlarged by L2 compared with the boundary position of the actual disease;
2) after the treatment range is determined, breaking the surface layer of the concrete slab within the surface layer treatment range;
3) determining the pavement base layer breaking range by taking the surface layer breaking boundary as a reference, wherein the base layer breaking boundary is smaller than the surface layer boundary by L1;
4) after the pavement base layer breaking range is determined, breaking the pavement base layer structure in the pavement base layer breaking range;
5) pouring low-grade concrete in the pavement base breaking range to serve as a new pavement base structure;
6) sequentially and transversely arranging pull rods on the boundary of the original concrete pavement along the circumferential direction;
7) paving a waterproof layer on the low-grade concrete of the pavement base;
8) pouring a roller compacted concrete surface layer in the surface layer treatment range;
9) after the concrete is cured to meet the requirements, joints between the new concrete surface layer and the old concrete surface layer are filled with joints; after the joint filling material is finished, the traffic can be opened.
Further, in the step 1), the L2 is 40-60 cm.
Further, L2 was 50 cm; the expansion of 50cm is selected based on the convenience of arranging the pull rod bar planting at the later stage, and the phenomenon that the foundation layer is damaged due to the fact that the surface layer cutting seams and the foundation layer cutting seams are staggered can be effectively avoided.
Furthermore, the treatment range of the surface layer follows the round hole square supplement rule, and the treatment range is rectangular or square.
Further, in the step 3), the L1 is 20-30 cm.
Furthermore, L1 is 25cm, the pavement base layer breaking boundary is 25cm smaller than the pavement breaking boundary based on the length of the pull rod, and a step lap joint structure is formed between the pavement base layer and the pavement to prevent pavement moisture from invading the base layer.
Further, in the step 5), the low-grade concrete is C15, C20 or C25 and the like; on one hand, the concrete surface layer is used as a transition layer with the modulus difference with a roadbed, and on the other hand, the maintenance period of the low-grade concrete can meet the strength requirement in a short time.
Further, in the step 6), the mode of arranging the pull rod is drilling and bar planting; the pull rod is arranged in the concrete slab, so that good slab body property is formed between a newly poured concrete surface layer and a concrete slab.
Further, in the step 7), the waterproof layer is SBS modified emulsified asphalt waterproof paint; the waterproof layer is sprayed on the low-grade concrete of the road surface base layer, and the SBS modified emulsified asphalt waterproof coating is a high-elasticity waterproof coating prepared by selecting high-quality petroleum asphalt, taking SBS as a modifier and adding various auxiliary materials such as rubber, synthetic resin, a surfactant, an emulsifier and the like.
Further, pouring a roller compacted concrete surface layer in the step 8), completing the processes of primary pressing, secondary pressing and final pressing of the roller compacted concrete, and then curing for a short time; the invention adopts the roller compacted concrete because the water consumption of the roller compacted concrete is much lower than that of the common concrete, so the strength increase speed of the roller compacted concrete is faster than that of the common concrete, the 3d flexural strength of the roller compacted concrete can reach more than 70 percent of 28d under the condition of not doping fly ash, and the 3d flexural strength of the roller compacted concrete can reach more than 60 percent of 28d under the condition of doping 20 percent fly ash. Therefore, the design strength can be achieved in a short time, and the traffic can be recovered quickly.
Further, in the step 9), the joint filling material is modified asphalt; the joint filling requirement is full, uniform, consistent in thickness and continuous in penetration, and the joint filling material cannot be lost, cracked and seeped.
L is the length of the pull rod, L1 is the distance between the surface layer and the boundary of the base layer, L2 is the distance between the width of the new concrete surface layer and the actual damage, b is the thickness of the roller compacted concrete surface layer, and b1 is the thickness of the C20 lean concrete layer.
In an embodiment 1 of the present invention, a pavement structure of 24cm cement concrete pavement +18cm cement-stabilized macadam foundation (5:95) +18cm cement-stabilized macadam foundation (4:96) +15cm graded macadam is taken as an example, and when the pavement is seriously damaged, the pavement surface and foundation layer need to be repaired.
And determining a surface treatment boundary by a field technician according to the disease range of the concrete pavement, wherein the surface treatment range is expanded by 50cm from the actual disease boundary position, the surface treatment boundary follows a round hole square supplement rule, the treatment range is rectangular or square, and the boundary is marked by a white sideline.
And (3) chiseling a concrete surface layer structure within the range of the white sideline, wherein the thickness is 24cm, measuring the range of the base layer demolition by a technician with a ruler after chiseling, and the number of the demolition boundary of the base layer is 25cm less than that of each side of the concrete surface layer boundary.
And chiseling a first 18cm cement-stabilized macadam foundation layer (5:95), and cleaning the disturbed part of a second 18cm cement-stabilized macadam foundation layer (4:96) when the first layer is chiseled.
And pouring a low-grade C20 lean concrete base layer with the thickness of 20cm, selecting a curing mode according to the local air temperature, dispersing water at high temperature for curing, covering the geotextile, curing for 1 day, preserving heat and moisture at low temperature for curing for 2-3 days.
After the C20 lean concrete base reached 40% design strength, a person could walk on it. And (3) drilling holes on the concrete boundary which is not chiseled at present, implanting steel bars as pull rods, wherein the diameter phi 16 of the steel bars is required, the length L is 40cm, and the distance between the steel bars is 50 cm.
C20 concrete and the current 18cm cement stabilized macadam foundation are sprayed with SBS modified emulsified asphalt waterproof paint, the paint is coated on three sides, after the upper layer is dried on the surface of each side, the lower layer is coated, the coating thickness is required to be 0.4-0.7 mm, and the dosage is 1.6kg/m2And (5) controlling.
And pouring a roller compacted concrete surface layer, finishing the processes of primary pressing, secondary pressing and final pressing of the roller compacted concrete, and then maintaining for a short time, wherein the primary pressing adopts the static pressure of a steel wheel roller or a vibratory roller, the static pressure overlapping amount is preferably 1/3-1/4 steel wheel width, and the number of primary pressing passes is preferably 2. And the re-pressing is carried out by adopting a vibratory roller for vibratory rolling, and the overlapping amount is preferably 1/3-1/2 vibratory rolling width. The number of the re-pressing passes is controlled according to the detection of reaching the specified degree of compaction, and is preferably 2 to 6. And the final pressure is static pressure of a tyre roller. The final pressing pass takes closing surface microcracks and eliminating wheel tracks as the pressure stopping standard, and is preferably 2-8 times. It is desirable to shorten the time for completing the whole rolling operation as much as possible. If local sun drying and air drying are indicated, spraying is carried out in time. And covering the surface in time after compaction, and watering for health preservation.
After the concrete is cured to meet the requirements, joints between the old and new concrete surface layers are filled, the joint filling material is modified asphalt, the joint filling requirements are full, uniform, consistent in thickness and continuous in communication, and the joint filling material cannot be lost, cracked or seeped. After the joint filling material is finished, the traffic can be opened.
In the embodiment 2, the pavement structure of 24cm cement concrete pavement, 18cm cement stabilized macadam foundation (5:95) +18cm cement stabilized macadam foundation (4:96) +15cm graded macadam is taken as an example, and when the pavement is damaged, the situation that only the pavement surface layer needs to be repaired is explained.
And determining a surface treatment boundary by a field technician according to the disease range of the concrete pavement, wherein the surface treatment range is expanded by 50cm from the actual disease boundary position, the surface treatment boundary follows a round hole square supplement rule, the treatment range is rectangular or square, and the boundary is marked by a white sideline.
Chiseling off the concrete surface course structure within the white sideline scope, thickness 24cm, to the current situation not chiseling off the concrete boundary drilling implant reinforcing bar as the pull rod, reinforcing bar requirement diameter phi 16, length L equals 40cm, reinforcing bar interval 50 cm.
At present, an SBS modified emulsified asphalt waterproof coating is sprayed on a 18cm cement-stabilized macadam base layer, the coating is coated on three sides, after the surface of the upper layer is dried after each side coating, the next layer is coated, the coating thickness is required to be 0.4-0.7 mm, and the dosage of the coating is 1.6kg/m2And (5) controlling.
And pouring a roller compacted concrete surface layer, finishing the processes of primary pressing, secondary pressing and final pressing of the roller compacted concrete, and then maintaining for a short time, wherein the primary pressing adopts the static pressure of a steel wheel roller or a vibratory roller, the static pressure overlapping amount is preferably 1/3-1/4 steel wheel width, and the number of primary pressing passes is preferably 2. And the re-pressing is carried out by adopting a vibratory roller for vibratory rolling, and the overlapping amount is preferably 1/3-1/2 vibratory rolling width. The number of the re-pressing passes is controlled according to the detection of reaching the specified degree of compaction, and is preferably 2 to 6. And the final pressure is static pressure of a tyre roller. The final pressing pass takes closing surface microcracks and eliminating wheel tracks as the pressure stopping standard, and is preferably 2-8 times. It is desirable to shorten the time for completing the whole rolling operation as much as possible. If local sun drying and air drying are indicated, spraying is carried out in time. And covering the surface in time after compaction, and watering for health preservation.
After the concrete is cured to meet the requirements, joints between the old and new concrete surface layers are filled, the joint filling material is modified asphalt, the joint filling requirements are full, uniform, consistent in thickness and continuous in communication, and the joint filling material cannot be lost, cracked or seeped. After the joint filling material is finished, the traffic can be opened.
In summary, the invention relates to a quick repairing method of a cement concrete pavement, which is suitable for medium and light traffic of road traffic grades, the method firstly determines the treatment range of the concrete pavement, and the determination range follows the principle of square patching of a round hole; then, performing slotting construction on the current concrete pavement and the base layer, wherein the length and the width of the slotting boundary of the current concrete pavement are 50cm wider than the length and the width of the current damage, and are 25cm wider than the length and the width of the base layer, and the concrete and the base layer between the slots are chiseled; chiseling back flattening road bed, the basic unit resumes to adopt gradation rubble + C20 concrete structure, and the surface course resumes to adopt roller compacted concrete layer, for guaranteeing roller compacted concrete and peripheral concrete slab wholeness, drills the bar planting and implants the pull rod according to the determining deviation around old concrete slab. The method can quickly repair the concrete pavement diseases, ensure the strength of the pavement structure, quickly open traffic and reduce the influence on municipal traffic.
The above is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereby, and therefore, the present invention is not limited by the scope of the claims.
Claims (8)
1. A quick repairing method for a cement concrete pavement is characterized by comprising the following steps:
1) determining a surface treatment range according to the disease condition of the concrete pavement, wherein the surface treatment range is enlarged by L2 compared with the boundary position of the actual disease;
2) breaking the surface layer of the concrete slab within the surface layer treatment range;
3) determining the pavement base layer breaking range by taking the surface layer breaking boundary as a reference, wherein the base layer breaking boundary is smaller than the surface layer boundary by L1;
4) breaking the pavement base structure within the pavement base breaking range;
5) pouring low-grade concrete in the pavement base breaking range to serve as a new pavement base structure;
6) sequentially and transversely arranging pull rods on the boundary of the original concrete pavement along the circumferential direction;
7) paving a waterproof layer on the low-grade concrete of the pavement base;
8) pouring a roller compacted concrete surface layer in the surface layer treatment range;
9) and after the concrete is cured to meet the requirements, filling joints between the new concrete surface layer and the old concrete surface layer.
2. The method for rapidly repairing a cement concrete pavement according to claim 1, wherein in the step 1), the L2 is 40-60 cm.
3. The method for rapidly repairing a cement concrete pavement according to claim 1, wherein in the step 3), the L1 is 20-30 cm.
4. A method for rapidly repairing a cement concrete pavement as claimed in claim 1, wherein in said step 5), the low grade concrete is C15, C20 or C25.
5. The method for rapidly repairing a cement concrete pavement according to claim 1, wherein in the step 6), the pull rod is arranged by drilling and bar planting.
6. The method for rapidly repairing a cement concrete pavement according to claim 1, wherein in the step 7), the waterproof layer is SBS modified emulsified asphalt waterproof paint.
7. The method for rapidly repairing a cement concrete pavement according to claim 1, wherein a roller compacted concrete pavement is poured in the step 8), and the processes of initial pressing, re-pressing and final pressing of the roller compacted concrete are completed, and then the roller compacted concrete can be cured for a short time.
8. A method for rapidly repairing a cement concrete pavement as claimed in claim 1, wherein in said step 9), the joint filling material is modified asphalt.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911202783.0A CN110820466A (en) | 2019-11-29 | 2019-11-29 | Quick repairing method for cement concrete pavement |
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| CN201911202783.0A CN110820466A (en) | 2019-11-29 | 2019-11-29 | Quick repairing method for cement concrete pavement |
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| CN110820466A true CN110820466A (en) | 2020-02-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112962377A (en) * | 2021-02-03 | 2021-06-15 | 四川吉凯瑞建设工程有限公司 | Detachable cast-in-place concrete pavement and pouring method |
| CN114960336A (en) * | 2022-05-13 | 2022-08-30 | 长沙环境保护职业技术学院 | Assembly type pavement base rapid repairing structure and construction method |
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2019
- 2019-11-29 CN CN201911202783.0A patent/CN110820466A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112962377A (en) * | 2021-02-03 | 2021-06-15 | 四川吉凯瑞建设工程有限公司 | Detachable cast-in-place concrete pavement and pouring method |
| CN114960336A (en) * | 2022-05-13 | 2022-08-30 | 长沙环境保护职业技术学院 | Assembly type pavement base rapid repairing structure and construction method |
| CN114960336B (en) * | 2022-05-13 | 2023-12-22 | 长沙环境保护职业技术学院 | Assembled pavement base layer rapid repair structure and construction method |
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