CN112609553A - Construction method for treating road cracks by using waterborne polyurethane - Google Patents
Construction method for treating road cracks by using waterborne polyurethane Download PDFInfo
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- CN112609553A CN112609553A CN202011458532.1A CN202011458532A CN112609553A CN 112609553 A CN112609553 A CN 112609553A CN 202011458532 A CN202011458532 A CN 202011458532A CN 112609553 A CN112609553 A CN 112609553A
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- crack
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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
- E01C23/06—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road
- E01C23/09—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges
- E01C23/0966—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for filling or priming, with or without working the surface of the filling or applying particulate material thereto, e.g. for filling the joints of stone-sett paving
- E01C23/0973—Devices or arrangements for working the finished surface; Devices for repairing or reconditioning the surface of damaged paving; Recycling in place or on the road for forming cuts, grooves, or recesses, e.g. for making joints or channels for markings, for cutting-out sections to be removed; for cleaning, treating, or filling cuts, grooves, recesses, or fissures; for trimming paving edges for filling or priming, with or without working the surface of the filling or applying particulate material thereto, e.g. for filling the joints of stone-sett paving with liquid or semi-liquid materials, e.g. crack sealants
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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
- E01C23/01—Devices or auxiliary means for setting-out or checking the configuration of new surfacing, e.g. templates, screed or reference line supports; Applications of apparatus for measuring, indicating, or recording the surface configuration of existing surfacing, e.g. profilographs
Abstract
The invention discloses a construction method for treating road cracks by using waterborne polyurethane, which comprises the following steps: firstly, carrying out nondestructive testing on road cracks, drawing a crack distribution diagram, then cutting and slotting the cracks with the width smaller than 3mm according to needs, then drilling grouting holes at intervals along the crack trend, installing grouting pipes, injecting water into the cracks, then injecting a water-based polyurethane grouting material, allowing slurry and water to react in the cracks to generate gel to fill the cracks, sealing the grouting holes after grouting is finished, and finally rechecking to confirm that repairing is finished. The invention has the beneficial effects that: the road crack visual detection can be realized, the follow-up grouting repair is effectively guided, the characteristics of high reaction speed and short gel time when the water-based polyurethane material meets water are ingeniously utilized, the roadbed and the road crack can be rapidly and comprehensively repaired, the material can not generate a corrosion effect, the road crack disease is effectively solved, and the road crack visual detection has wide applicability.
Description
Technical Field
The invention belongs to the technical field of road maintenance, and particularly relates to a construction method for treating road cracks by using waterborne polyurethane.
Background
At present, asphalt concrete pavements and cement concrete pavements are the most important pavement forms in China. However, as the load of the vehicle increases, the damage of the overweight of the vehicle to the road surface becomes more and more serious, and the road built in the early stage enters a maintenance stage in advance. Among the numerous pavement diseases, pavement cracks are the most common and difficult to eradicate. After the pavement cracks, harmful impurities on the road surface and the like enter the roadbed or the base layer along with the influence of water and vehicle running, so that the defects of sludge pumping, plate bottom emptying and the like are caused, and the travelling comfort of the pavement is influenced. The generation of the pavement cracks generates great harm to the road structure, the pavement cracks are timely processed, the maintenance cost can be reduced, the service life of the road is prolonged, and the driving safety is ensured.
At the present stage, most of the treatment of road cracks adopts materials such as asphalt crack pouring glue, crack pressing strips and the like to fill and repair cracks generated on a road surface. Although the method can solve the problem of road crack diseases to a certain extent, the pavement structure layer is only repaired on the surface, cracks below the pavement cannot be effectively repaired, the bonding effect of the pavement structure layer is gradually reduced under the further action of vehicle load along with the passage of time, and the loose property of an unrepaired area of the base layer is further deepened, so that the original cracks of the pavement are enlarged, and even new pavement cracks appear.
The waterborne polyurethane has better development in recent years, and has good application in many engineering fields due to the characteristics of high reaction speed when meeting water and short gelation time. The water-based polyurethane at normal temperature is light yellow oily liquid, and can be injected to the source of a crack through the grouting effect of a grouting pipe. The water-based polyurethane material can quickly react after meeting water, and after the reaction is finished, the mixed liquid is changed into white jelly-like elastic gel, and the strength of the gel meets the engineering requirements. A common use scenario is engineering leakage stoppage, for example, emergency leakage stoppage is performed on a water seepage area during underground construction. However, it is not used in the field of road restoration. The inventor of the application creatively applies the method to the repair of the road crack.
Disclosure of Invention
In view of the above, the invention provides a construction method for treating road cracks by using waterborne polyurethane.
The technical scheme is as follows:
the construction method for treating road cracks by using the waterborne polyurethane is characterized by comprising the following steps of,
the method comprises the following steps of firstly, carrying out nondestructive testing on cracks of a road, and drawing a crack distribution diagram;
dividing a construction operation area according to a crack distribution diagram, and cutting and grooving the cracks with the width less than 3mm along the development direction of the cracks, wherein the cutting depth is 5 cm;
directly carrying out the third step on the cracks with the width of more than or equal to 3 mm;
drilling grouting holes, wherein the grouting holes are distributed along the trend of the crack and are provided with grouting pipes;
injecting water into the crack by using a water injection vehicle, and injecting a grouting material into the crack through the grouting pipe, wherein the grouting material is waterborne polyurethane so as to react with the water to form gel and fill and repair the crack;
and step five, after the repair is finished, rechecking to confirm the repair effect.
As a preferred technical scheme, the specific process of the first step is to perform nondestructive testing on the road by using a three-dimensional ground penetrating radar, analyze radar map characteristics of different pavement structure layers, analyze the characteristics of the crack such as shape, trend and burial depth from the top surface of the pavement at the crack, and draw a crack distribution map.
As a preferred technical scheme, the concrete process of the third step is to drill holes along the crack development trend by using a drilling machine, wherein the distance between every two adjacent grouting holes is 1m, and the depth of each grouting hole is not less than the development depth of the crack.
Preferably, in the fourth step, 2L of water is injected into each 1m long fracture to ensure that the interior of the fracture is kept in a wet state, and then the grouting material is injected, and 2.5Kg of grouting material is injected into each 1m long fracture.
As a preferred technical scheme, in the fourth step, when the grouting pipe is pulled out after grouting, the container is used for receiving and preventing the grout from spilling on the road surface, and meanwhile, the grouting hole is quickly sealed by the hot-melt asphalt.
Preferably, in the fifth step, the repaired crack is subjected to three-dimensional ground penetrating radar rechecking, and when the length of the crack exceeds 500m, coring and rechecking are performed.
Compared with the prior art, the invention has the beneficial effects that: the road crack detection method has the advantages that road crack properties and parameters are fully mastered by adopting a nondestructive detection mode, visual detection is realized, follow-up grouting repair is effectively guided, the characteristics of high reaction speed and short gel time when the waterborne polyurethane material meets water are ingeniously utilized, not only can the crack be filled, but also the bearing strength of a roadbed below the crack can be enhanced, the roadbed and the road crack can be rapidly and comprehensively repaired, the material can not generate a corrosion effect, the road crack diseases are effectively solved, and the road crack detection method has wide applicability.
Drawings
FIG. 1 is a schematic illustration of the detection of a road crack using a three-dimensional ground penetrating radar;
FIG. 2 is a schematic view of grouting hole layout;
FIG. 3 is a schematic of water injection and grouting into a fracture.
Detailed Description
The present invention will be further described with reference to the following examples and the accompanying drawings.
A construction method for treating road cracks by using waterborne polyurethane comprises the following steps:
step one, as shown in figure 1, carrying out nondestructive testing on the road 1 by adopting a three-dimensional ground detection radar 7, wherein a pavement structure layer of the road 1 sequentially comprises an asphalt pavement surface layer, a cement stabilized gravel layer and a roadbed pseudo-ginseng grey soil layer from top to bottom. And analyzing radar map characteristics of different pavement structure layers, starting from the top surface of the pavement at the crack 2, analyzing the characteristics of the crack 2 such as shape, trend and burial depth, and drawing a crack distribution map.
And secondly, dividing a construction operation area according to the crack distribution diagram, and cutting and slotting the crack 2 with the width less than 3mm along the development direction of the crack 2, wherein the slotting width is 3mm, and the cutting depth is 5cm, so that the subsequent grouting and grouting operation are facilitated. And (5) directly carrying out the third step on the crack 2 with the width of more than or equal to 3 mm.
Drilling grouting holes 3 along the development trend of the crack 2 by using a drilling machine, wherein the depth of each grouting hole 3 is not less than the development depth of the crack 2, as shown in fig. 2, the grouting holes 3 are distributed along the trend of the crack 2, the distance between every two adjacent grouting holes 3 is 1m, and a grouting pipe 4 is installed.
Step four, as shown in fig. 3, a water injection truck 5 is used for injecting water into the crack 2 through a water injection pipeline 6, 2L of water is injected into each 1m long crack 2 to ensure that the interior of the crack 2 is kept in a wet state, then a grouting material is injected into the crack 2 through the grouting pipe 4, 2.5Kg of the grouting material is injected into each 1m long crack 2, and the grouting material is waterborne polyurethane. After being injected into the crack 2, the water-based polyurethane reacts with free water in the crack 2 to form gel, and the crack 2 is filled and repaired. When the grouting pipe 4 is pulled out after the grouting is finished, the container is used for receiving and preventing the grout from scattering on the pavement, and meanwhile, the grouting hole 3 is quickly sealed by the hot melt asphalt. And wiping the slurry scattered on the pavement clean by using a cloth. And after grouting is finished, each working area is scrubbed, and waste liquid is cleaned.
And fifthly, after repairing is finished, performing three-dimensional ground penetrating radar rechecking on the repaired crack 2, and when the length of the crack 2 exceeds 500m, performing coring rechecking. And when the coring result and the three-dimensional ground penetrating radar result show that the crack 2 is completely filled, the purpose of treating the crack is confirmed to be achieved.
The water-based polyurethane takes polypropylene oxide glycol as a main raw material, and the polypropylene oxide glycol reacts quickly to form gel after meeting water. The gel expansion multiple is 2 times, the compressive strength is 10Mpa, and the roadbed can be effectively enhanced and pavement cracks can be filled.
Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.
Claims (6)
1. A construction method for treating road cracks by using waterborne polyurethane is characterized by comprising the following steps:
the method comprises the following steps of firstly, carrying out nondestructive testing on cracks (2) of a road (1), and drawing a crack distribution diagram;
dividing a construction operation area according to a crack distribution diagram, and cutting and grooving the crack (2) with the width smaller than 3mm along the development direction of the crack (2), wherein the cutting depth is 5 cm;
directly carrying out the third step on the cracks (2) with the width of more than or equal to 3 mm;
drilling grouting holes (3), wherein the grouting holes (3) are distributed along the trend of the crack (2), and grouting pipes (4) are installed;
injecting water into the crack (2) through a water injection pipeline (6) by using a water injection vehicle (5), and then injecting a grouting material into the crack (2) through a grouting pipe (4), wherein the grouting material is waterborne polyurethane so as to react with the water to form gel and fill and repair the crack (2);
and step five, after the repair is finished, rechecking to confirm the repair effect.
2. The construction method for treating road cracks by using the waterborne polyurethane as claimed in claim 1, wherein the construction method comprises the following steps: the specific process of the first step is that the road (1) is subjected to nondestructive testing by adopting a three-dimensional land penetrating mine (7), radar map characteristics of different pavement structure layers are analyzed, the crack (2) is analyzed from the top surface of the road surface, the shape, the trend, the burial depth and other characteristics of the crack (2) are analyzed, and a crack distribution map is drawn.
3. The construction method for treating road cracks by using the waterborne polyurethane as claimed in claim 1, wherein the construction method comprises the following steps: and the specific process of the third step is that a drilling machine is adopted to drill along the development trend of the crack (2), the distance between every two adjacent grouting holes (3) is 1m, and the depth of each grouting hole (3) is not less than the development depth of the crack (2).
4. The construction method for treating road cracks by using the waterborne polyurethane as claimed in claim 1, wherein the construction method comprises the following steps: in the fourth step, 2L of water is injected into each 1m long crack (2) to ensure that the interior of the crack (2) is kept in a wet state, then the injection of the grouting material is started, and 2.5Kg of the grouting material is injected into each 1m long crack (2).
5. The construction method for treating road cracks by using the waterborne polyurethane as claimed in claim 1 or 4, wherein the construction method comprises the following steps: and in the fourth step, when the grouting pipe (4) is pulled out after grouting is finished, the container is used for receiving and preventing the grout from spilling on the road surface, and meanwhile, the grouting hole (3) is quickly sealed by hot melt asphalt.
6. The construction method for treating road cracks by using the waterborne polyurethane as claimed in claim 1, wherein the construction method comprises the following steps: and fifthly, performing three-dimensional ground penetrating radar rechecking on the repaired crack (2), and coring and rechecking when the length of the crack (2) exceeds 500 m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011458532.1A CN112609553A (en) | 2020-12-11 | 2020-12-11 | Construction method for treating road cracks by using waterborne polyurethane |
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| CN202011458532.1A CN112609553A (en) | 2020-12-11 | 2020-12-11 | Construction method for treating road cracks by using waterborne polyurethane |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113107018A (en) * | 2021-05-21 | 2021-07-13 | 北京中煤矿山工程有限公司 | Method for treating leakage water of underground structure crack |
| CN113529643A (en) * | 2021-07-08 | 2021-10-22 | 水利部交通运输部国家能源局南京水利科学研究院 | Visual restoration method and system for high dam deep buried diseases |
| CN114277775A (en) * | 2022-01-20 | 2022-04-05 | 中铁四院集团工程建设有限责任公司 | Construction method for treating long and narrow cracks |
| CN114775351A (en) * | 2022-04-29 | 2022-07-22 | 浙江实路工程技术有限公司 | Composite grouting pile treatment process for road deep diseases |
| CN115110368A (en) * | 2022-05-27 | 2022-09-27 | 郑州大学 | Method and device for preventing frost heaving thaw settlement grouting of reactive frozen soil highway subgrade thawing disk |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113107018A (en) * | 2021-05-21 | 2021-07-13 | 北京中煤矿山工程有限公司 | Method for treating leakage water of underground structure crack |
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| CN113529643A (en) * | 2021-07-08 | 2021-10-22 | 水利部交通运输部国家能源局南京水利科学研究院 | Visual restoration method and system for high dam deep buried diseases |
| CN113529643B (en) * | 2021-07-08 | 2022-03-08 | 水利部交通运输部国家能源局南京水利科学研究院 | Visual restoration method and system for high dam deep buried diseases |
| CN114277775A (en) * | 2022-01-20 | 2022-04-05 | 中铁四院集团工程建设有限责任公司 | Construction method for treating long and narrow cracks |
| CN114277775B (en) * | 2022-01-20 | 2023-10-03 | 中铁四院集团工程建设有限责任公司 | Construction method for repairing long and narrow cracks |
| CN114775351A (en) * | 2022-04-29 | 2022-07-22 | 浙江实路工程技术有限公司 | Composite grouting pile treatment process for road deep diseases |
| CN114775351B (en) * | 2022-04-29 | 2023-09-19 | 浙江实路工程技术有限公司 | Treatment process for road deep disease composite grouting pile |
| CN115110368A (en) * | 2022-05-27 | 2022-09-27 | 郑州大学 | Method and device for preventing frost heaving thaw settlement grouting of reactive frozen soil highway subgrade thawing disk |
| CN115110368B (en) * | 2022-05-27 | 2023-08-08 | 郑州大学 | Method and device for controlling frost heaving, thawing, sedimentation and grouting of reactive frozen soil highway subgrade thawing plate |
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