CN111424491A - Quick repairing process for assembled asphalt pavement pit slot - Google Patents

Quick repairing process for assembled asphalt pavement pit slot Download PDF

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Publication number
CN111424491A
CN111424491A CN201910443382.8A CN201910443382A CN111424491A CN 111424491 A CN111424491 A CN 111424491A CN 201910443382 A CN201910443382 A CN 201910443382A CN 111424491 A CN111424491 A CN 111424491A
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CN
China
Prior art keywords
asphalt
pit
pavement
repairing
assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910443382.8A
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Chinese (zh)
Inventor
乔建刚
彭斌
钱锋
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Hebei University of Technology
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Hebei University of Technology
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Filing date
Publication date
Application filed by Hebei University of Technology filed Critical Hebei University of Technology
Priority to CN201910443382.8A priority Critical patent/CN111424491A/en
Publication of CN111424491A publication Critical patent/CN111424491A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00Details of pavings
    • E01C11/005Methods or materials for repairing pavings

Abstract

The invention relates to a quick repairing process for assembled asphalt pavement pits, which is characterized in that pre-selected graded aggregate and viscous asphalt are heated and mixed in a mixing station, the mixed material is poured into a specially laid steel plate field, and the steel plate field is paved and rolled into a plate shape with corresponding compactness and thickness. And cutting the compacted and cooled asphalt concrete slab into plate shapes with the same size according to the specification of the required assembly blocks. When repairing the asphalt pavement pit slot, the original pit slot is excavated and milled according to the specification of the asphalt concrete assembly block or the corresponding multiple of the asphalt concrete assembly block, and the assembly block is laid in the pit slot. The bottom of the assembling block and the bottom surface of the pit groove are both required to be brushed with a thin layer of bonding asphalt to increase the bonding property; and performing crack pouring treatment on the joints between the filled assembly blocks and the wall of the original pavement groove so as to facilitate the combination of the new pavement and the old pavement to finish the repair.

Description

Quick repairing process for assembled asphalt pavement pit slot
Technical Field
The invention relates to a repair process of a pit of an assembled asphalt pavement, belonging to the field of traffic engineering.
Background
The main measures for repairing the pit are hot mixing and cold repairing. The hot mixing method has the characteristics of needing special equipment, large energy consumption, high construction requirement, easy weak joint repairing by using the hot mixing method and inconvenient construction in winter and rainy season. Cold patching often uses materials with insufficient early strength and long-term durability, which is not suitable for pavement patching in humid environments. Meanwhile, in the existing cold mixing and hot mixing technology, rainwater easily enters corners which cannot be fully compacted, so that secondary or even multiple damages are easily caused. In summary, although the hot plate and cold patch effects can meet the road performance requirements, the problems of long repair time, large influence on traffic, large investment, resource waste, environmental pollution and the like exist; and poor durability after repair, great influence by seasonal changes, and difficulty in solving the problems of new and old interfaces of the pavement structure. The method has incomparable advantages in the aspects of low consumption and maintenance cost, easy realization of quick repair of the asphalt pavement pit slots, maintenance of good pavement performance, prolonging of the service life of the pavement and the like, thereby providing the quick repair method of the asphalt pavement pit slots with stable quality and low cost.
Disclosure of Invention
The invention aims to: the process for repairing the pits on the assembled asphalt pavement is characterized in that an asphalt concrete assembly block and the original pavement are tightly bonded into an integral stressed structure through the synergistic action between a joint filling material and bonded asphalt. The method has the advantages of realizing the quick repair of the pits of the asphalt pavement with good economic benefit, reducing the influence of the pit diseases on traffic, maintaining good pavement performance and prolonging the service durability of the pavement.
Another object of the invention is: the preparation process of the asphalt concrete assembling block is simple and easy to implement, and large-scale production of the assembling block is facilitated, so that rapid repair of large-area pits on the road surface is facilitated.
A technology for quickly repairing the assembled pit on asphalt pavement includes such steps as mixing the graded aggregate with viscous asphalt, stirring, pouring the mixture of asphalt into steel plate, spreading, rolling to obtain plate, digging and milling the original pit according to the size of asphalt concrete block, and brushing the modified thin layer of SBS on the bottom of assembled block and the bottom of pit.
The assembly block preparation process comprises the following steps:
1. firstly, determining the type of the mixture used by the pit of the asphalt pavement to be repaired, secondly, for the convenience of filling, the specification of the length m × width n cm and the thickness b cm is adopted for the assembly blocks (the thickness b is half of the pit depth a + the maximum particle size of the aggregate used by the upper layer), and the assembly blocks are shown in figure 1.
2. And (3) mixture manufacturing equipment: generally, according to the pit repairing demand, a mobile asphalt concrete mixing station with smaller production capacity is preferably adopted. The mixing station comprises a mixing plant main body, a finished product bin, an asphalt tank, a heat conduction oil furnace, a stone powder bin, aggregate conveying and drying dust collecting equipment, emulsifying and modified asphalt equipment, testing equipment and the like.
3. A cutting device and a site for preparing the assembly blocks need to be provided with a movable asphalt pavement slab cutting machine (such as a small asphalt pavement road cutting machine HS-450D), a steel plate (with patterns convenient to cut) capable of accommodating 50 × 34m is arranged, the patterns are used for enabling the assembly blocks to form rough surfaces mutually embedded and extruded with the bottom surfaces of the pit grooves, the thickness of the steel plate is 1-2 cm, and the flat open site capable of paving and compacting asphalt mixtures can be met.
5. And mixing according to the required dosage of the asphalt mixture for repairing the pit slot, pouring the mixed asphalt mixture onto a steel plate of an assembly block preparation field, paving and compacting to obtain an asphalt concrete slab with the thickness of b cm and the thickness of 50 × 30 m.
6. After compaction and cooling, the asphalt concrete slabs are evenly cut into m × n × b cm assembling blocks for storage or on-site pit slot repairing.
The method has the advantages that ① consumes low maintenance cost, quick repair of the asphalt pavement pit slot is easy to realize, good pavement performance is maintained, and the service life of the pavement is prolonged. ② is more outstanding in the durability of the pit slot repaired according to the method compared with other pit slot repairing modes, traffic can be opened in time in rainy season and winter and spring (under the condition of low temperature), maintenance of the asphalt pavement is more convenient, ③ is used for repairing the pit slot, lofting, digging, milling, bottom layer reinforcing and leveling and joint filler bonding are carried out according to the multiple of the specification and the size of the assembly blocks, round slot square repair is achieved, technical operation rules are strict, ④ is used for labor division operation according to each procedure when repairing the pit slot, oil heating time is not needed, the assembly blocks can be manufactured indoors in rainy season in winter (even prefabricated and stored in advance), the working hour utilization rate is improved, ⑤ prefabricated assembly blocks strictly control the oil-stone ratio, the oil consumption is relatively saved, the utilization rate is improved, maintenance cost is reduced, ⑥ is convenient for centralized prefabricating in a special site, the hot mixing performance is achieved, and the aggregate pouring requirement for high-grade waterproof aggregate is good.
Drawings
FIG. 1 shows the specification of an assembly block
FIG. 2 is a view showing a structure for repairing an assembly block pit
Detailed Description
The following describes the attention and procedures of the quick repair worker for the assembled asphalt pavement pits, and further details are provided:
1. the method for repairing the pit of the asphalt pavement by using the assembling blocks comprises the following steps of:
① when digging and milling the pit, cutting and recording the regular and smooth edges of the four sides and the ground, otherwise, the problems of difficult arrangement of the asphalt concrete assembling block, poor repairing durability and the like can be caused;
② the excavation and milling thickness of the pit is a cm, one half of the maximum grain size of the upper aggregate which is higher than the assembly block is that the embedding and squeezing among the aggregates in the asphalt mixture is compact under the action of natural sedimentation and automobile rolling after the repairing is finished, and the assembly block shown in figure 2 is contacted with the rough surface between the bottom surfaces of the pit.
③ reinforcing the base layer of deep pit, otherwise, because the repairing compactness and flatness are not consistent, the pavement flatness is poor after pavement is paved, and the specification of the assembly block needs to be drawn up again according to the pit depth and the maximum particle size of the aggregate nominal;
④ the use of the above-mentioned pit slot repairing adhesive to fill the seams between blocks and pit slot wall can result in excessive oil content and easily produce oil-flooding phenomenon.
2. Pit repairing process
The invention is described in further detail below with reference to the accompanying drawings:
the invention relates to a process for repairing a pit of an assembled asphalt pavement, wherein a pit repairing structure is shown in figure 2.
The method specifically comprises the following steps:
1) firstly, carrying out the survey of the defects of the pits of the asphalt pavement, counting the number and the size of the pits, calculating the using amount of the asphalt mixture, and calibrating the excavation and milling dimensions on site.
Then, feeding the calculated dosage and the statistical result back to a mixing station and an assembly block preparation field;
2) after the mixture is mixed, uniformly cutting the paved and compacted asphalt concrete slab into m × n × b cm assembly blocks by an assembly block preparation field and transporting the assembly blocks to a construction site;
3) meanwhile, excavating and milling the pavement with pit defects according to the specification of m × n × a cm or corresponding multiples thereof (the size of the four sides of the pit is 5-10mm larger), wherein the walls of the pits are required to be vertical and neat, and the bottom surface is required to be flat;
4) uniformly smearing a thin layer of SBS modified bonding asphalt (the thickness is ignored) on the bottoms of the excavated and milled pit slot and the assembly block;
5) before the assembling block is installed, a layer of adhesive is brushed on the periphery of the pit wall and the assembling block, and after the assembling is finished, the adhesive for the joint between the pit wall and the assembling block (the adhesive developed by the first inventor before Job construction, invention name: a binding agent for repairing a pit groove of an asphalt pavement) is used for crack pouring, and if the pit groove is large and a plurality of pits are used for repairing, the binding agent is also brushed among the blocks;
6) and then, spraying and drying the seam by using a blast lamp, and leveling.
7) And finally, compacting by the road roller, namely pressing four sides firstly and then pressing the middle part, so that the traffic can be opened. The single assembly blocks can be directly paved by using a travelling crane for compaction.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims (3)

1. The quick repairing process for assembled asphalt pavement pit slot is characterized by that it utilizes professional equipment to heat and mix the pre-selected graded aggregate and viscous asphalt, after having been mixed, the dispersed asphalt mixture is poured into the specially-laid steel plate field (50 × 34m), and then the above-mentioned material is spread and rolled into the asphalt concrete plate with correspondent compactness and thickness of b cm, and then according to the specification length of required assembling block, m × width, n × height, the compacted and cooled asphalt concrete plate is uniformly cut into the plate form with identical specification.
2. The fabricated asphalt pavement pit repairing structure according to claim 1, wherein: the walls of the excavated pits are vertical and neat, the bottom surfaces of the pits are smooth, the size of each pit is 5-10mm larger than the size of a paved matched block, and the depth of each pit is acm. (one half of the maximum grain size of the aggregates on the upper layer, which are higher than the assembly blocks, is for facilitating the tight embedding and squeezing of the aggregates in the asphalt mixture under the actions of natural sedimentation and automobile rolling after the completion of repairing, such as the contact of the rough surfaces between the assembly blocks and the bottom surfaces of the pits shown in figure 2.)
3. The fabricated asphalt pavement pit repairing structure according to claim 2, wherein: a thin layer of SBS modified bonding asphalt is coated on the bottom of an assembly block and the bottom of a pit groove, a layer of adhesive is brushed on the walls of the pit groove and the periphery of the assembly block before the assembly block is paved, and after paving is finished, the joint between the walls of the pit groove and the assembly block needs the adhesive (the adhesive developed before the first inventor of the invention constructs the cement, the invention name is the adhesive for repairing the pit groove of the asphalt pavement) to carry out crack pouring treatment.
CN201910443382.8A 2019-05-22 2019-05-22 Quick repairing process for assembled asphalt pavement pit slot Pending CN111424491A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910443382.8A CN111424491A (en) 2019-05-22 2019-05-22 Quick repairing process for assembled asphalt pavement pit slot

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910443382.8A CN111424491A (en) 2019-05-22 2019-05-22 Quick repairing process for assembled asphalt pavement pit slot

Publications (1)

Publication Number Publication Date
CN111424491A true CN111424491A (en) 2020-07-17

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112323652A (en) * 2020-10-27 2021-02-05 合肥工业大学 Steel bridge deck pavement layer pit slot repairing method based on induction heating

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1932156A (en) * 2006-09-26 2007-03-21 长安大学 Asphalt road surface local damage immediate fast repairing method
CN101021055A (en) * 2007-02-06 2007-08-22 高强 Process of repairing pit in asphalt road
US7297720B2 (en) * 2002-06-14 2007-11-20 Ace Tire & Parts, Inc. Recyclable composite materials, articles of manufacture, and structures and methods of using composite materials
CN101475341A (en) * 2009-01-12 2009-07-08 华北建设集团有限公司 Asphalt pavement pit repairing binder
CN103114510A (en) * 2013-01-21 2013-05-22 合肥工业大学 Bituminous pavement provided with lattice structure transition compound layer and construction method thereof
CN104499431A (en) * 2015-01-08 2015-04-08 东南大学 Long-life pavement structure for steel bridge deck and pavement method of pavement structure
CN104631265A (en) * 2014-12-30 2015-05-20 新乡市公路勘察设计院 Porous water-permeable pavement repair material as well as production method and construction method of repair material
CN105603856A (en) * 2016-01-25 2016-05-25 重庆鹏方路面工程技术研究院有限公司 Method for rapidly maintaining BRT station heavy traffic road segment

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7297720B2 (en) * 2002-06-14 2007-11-20 Ace Tire & Parts, Inc. Recyclable composite materials, articles of manufacture, and structures and methods of using composite materials
CN1932156A (en) * 2006-09-26 2007-03-21 长安大学 Asphalt road surface local damage immediate fast repairing method
CN101021055A (en) * 2007-02-06 2007-08-22 高强 Process of repairing pit in asphalt road
CN101475341A (en) * 2009-01-12 2009-07-08 华北建设集团有限公司 Asphalt pavement pit repairing binder
CN103114510A (en) * 2013-01-21 2013-05-22 合肥工业大学 Bituminous pavement provided with lattice structure transition compound layer and construction method thereof
CN104631265A (en) * 2014-12-30 2015-05-20 新乡市公路勘察设计院 Porous water-permeable pavement repair material as well as production method and construction method of repair material
CN104499431A (en) * 2015-01-08 2015-04-08 东南大学 Long-life pavement structure for steel bridge deck and pavement method of pavement structure
CN105603856A (en) * 2016-01-25 2016-05-25 重庆鹏方路面工程技术研究院有限公司 Method for rapidly maintaining BRT station heavy traffic road segment

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112323652A (en) * 2020-10-27 2021-02-05 合肥工业大学 Steel bridge deck pavement layer pit slot repairing method based on induction heating

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Application publication date: 20200717

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