CN114990957A

CN114990957A - Cement concrete pavement joint maintenance five-three-two technology

Info

Publication number: CN114990957A
Application number: CN202210463258.XA
Authority: CN
Inventors: 罗正宇
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-09-02

Abstract

The invention discloses a cement concrete pavement joint maintenance five-three-two technology, which can promote the joint maintenance technology of various cement roads such as airport road (road) surfaces, national and provincial trunk roads, intercity roads, urban roads, rural roads and the like in China from extensive maintenance to precise maintenance by implementing the maintenance concept of four structures; development from release management to standard management gradually creates a novel economic, green, standard, simple, efficient and safe seam maintenance mode.

Description

Cement concrete pavement joint maintenance five-three-two technology

Technical Field

The invention relates to the field of road joints, in particular to a cement concrete pavement joint curing five-three-two technology.

Background

Firstly, setting a joint and maintaining the joint.

In view of the current state of China, in order to prevent the pavement surface or the slab from being damaged by thermal expansion and cold contraction, various joints are arranged in a specified time after the cement slab is built according to the requirements of the structure and the application function of the cement slab when the cement concrete slab is newly built. The cement concrete pavement slab joint should include: transverse joints, longitudinal joints, expansion joints and construction joints. So that the whole cement concrete pavement or cement concrete plate is divided into regular small blocks, and a certain gap is left between the small blocks. The gap width of general transverse joint, longitudinal joint and construction joint is 4-5mm, and expansion joint is 20-25mm, so that the plate can have enough expansion and contraction under the condition of temp. change, and can not be extruded or stretched to make plate surface break, arch plate or crack.

After the joints are arranged, in order to prevent rainwater from permeating into the roadbed from the joints, the roadbed is damaged; in order to prevent hard objects such as sand and stone from being embedded into the seam to cause failure of the expansion function of the seam. According to the relevant maintenance regulations of the state, the slot of the joint is filled with a certain depth of filler. The requirements for the technical properties of the filler are:

the filler is required to be firmly bonded with the two walls of the joint, and the filler is not cracked or bonded in the using process, so that the water such as rain, snow and the like can be effectively prevented from permeating into the roadbed through the joint to damage the roadbed;

the filler is required to have better elasticity so as to prevent the sand from being embedded into the filler and ensure that the function of adjusting the expansion of the joint is invalid;

the filler is required to have better ductility and can adapt to the corresponding change of the width of the seam slot of the seam when the temperature changes, and the filler is not pulled to be broken or separated from the seam wall;

the filler filled into the joint is required to have excellent weather resistance and to maintain a long functional life.

Currently, there are two main types of seam fillers commonly used in the market: one is low-grade original ecological asphalt or modified asphalt; one is a high-grade polymer material such as polyurethane, silicone, polysulfide rubber.

In fact, after a certain period of use, the filler in the joint may be replaced due to the aging of the filler in the joint, which means that the filler in the joint must be replaced periodically to ensure the use function of the joint. According to the non-mandatory relevant regulations of the state, the joint filler is replaced once in 2 to 3 years generally.

Secondly, water damage is the most common and serious damage form of cement concrete pavements in China.

What is the damage of cement concrete pavement by water? In the process of putting cement pavement into operation after construction, as the maintenance of cement pavement joints cannot be treated in place according to the maintenance requirements, surface water such as rain, snow and the like can penetrate into a cement pavement base layer through the joints to damage the cement pavement and cause various diseases, which are collectively called water damage.

Why will surface water penetrate into the cement pavement base and damage the cement pavement and cause various diseases? We made a simple qualitative analysis of the water damage mechanism as follows:

generally, after surface water enters a base layer of a cement road through cement road surface joints, if the road is lack of a perfect internal drainage structure of the road surface, the water seeping down from the road surface joints can be retained in the base layer for a long time, so that the roadbed is saturated with water. After the roadbed is soaked by water for a long time, the water content of the soil foundation is increased, the bearing capacity is reduced, and the strength of the roadbed is obviously reduced. Under the effect that the vehicle is current, make the saturated water in the road bed form the hydrodynamic pressure, will cause the harm to the chronic destruction of basic unit of cement road to form all kinds of diseases: the light causes mud pumping at the bottom of the pavement and slurry leakage at the joint; the road surface plate is structurally damaged by edge gnawing, dislocation, cracks, subsidence or plate fracture and the like.

Through qualitative analysis of water damage failure mechanism, the importance of the water damage failure mechanism to seam maintenance is deeply known. Therefore, the generation and development of various diseases of the cement concrete road can be effectively inhibited from the source after the joint maintenance is good. In the highway management sector, a sentence is popular: the maintenance of cement roads is the crack curing. We can understand this sentence as follows: the joint maintenance is held, namely the key of the cement road surface management maintenance is held, and the effect of achieving twice the result with half the effort can be achieved.

For a long time, the cement pavement joint maintenance technology cannot adapt to the green development advocated by the state and recycles a novel development concept due to the tradition and the ink conservation regulation. It is embodied in two aspects:

when the traditional joint full-clear full-filling curing process is implemented, the bad habit that two walls of the joint are widened manually is required, and the joint full-clear full-filling curing process is a direct reason that the effective functional service life of cement concrete pavements in China generally cannot meet the design requirements.

The full-clean filling maintenance process is that when the joint is refilled, all the old fillers in the joint must be cleaned out of the joint and then filled with new materials. To remove the used material completely from the joint, the two walls of the joint to which the used filler is adhered must be cut by a cutting machine to a thickness of 1-2mm each, with the consequence that the distance between the two walls of the joint is widened, which is generally 3-4mm for each repeated irrigation. Data collected by the inventors over the years in the field show that: the seam is irrigated for more than two times, and the seam width can be widened to more than 10-12 mm. After the seam is widened, five hidden dangers are brought:

1. after the seam widen, the chance that surface water such as sleet will increase by a wide margin from seam infiltration road bed, and surface water will make the soil matrix water content increase after the seam infiltration road bed, and bearing capacity descends, and road bed intensity can show and fall paper. If so, road surface mud pumping, slurry bleeding, cracks and slab staggering are caused; structural damage such as subsidence or fracture of the pavement slab is caused;

2. after the seam is widened, the edge of the seam is difficult to bear the long-term repeated impact damage of the wheel, and the diseases such as edge gnawing or corner fracture of the seam are easily caused;

3. after the seam is widened, if the seam is not maintained timely, the seam is easily plugged by mud, sand, gravel and other hard objects, when the temperature of the plate rises, local stress concentration is caused, and the plate is arched or crushed;

4. after the seam is widened, the vehicle jumping feeling is serious during driving, and the comfort of driving is deteriorated; serious potential safety hazards exist, and particularly, the harmfulness is more serious on expressways or airport runways;

5. after the seam widens, the high-rise period of the cement panel diseases can appear in advance relative to design requirements, not only increases difficulty and workload for the management and maintenance work of the road, but also greatly shortens the effective function life of the cement road. Statistical data, variously investigated by the inventors, show that: the effective functional life of the cement pavement in China at present is generally shorter than the design requirement by 5-10 years. To the knowledge of the inventor, the cost of constructing a cement concrete road is few thousands of yuan, and many hundreds of millions of billions or even billions yuan. If the management and maintenance work is limited by a cognition error area or the constraint of the traditional concept, the service life of the effective function of the cement road is greatly shortened, not only is economic waste caused, but also adverse effects can be caused in society.

After the traditional seam full-clear irrigation maintenance process is implemented, astronomical digital waste old fillers outside the seam are removed from the inside of the seam, and serious pollution is caused to the ecological environment of towns and farmlands around the highway.

In general, when a seam is maintained, waste filler outside the seam is removed from the seam, and the waste filler is mostly discarded at the periphery of a construction road; all the old fillers composed of polymer chemicals cannot be automatically degraded under natural conditions, and after being discarded, the old fillers can cause serious pollution to the ecological environment of towns and farmlands around highways. The inventors initially estimated: if estimated according to the width of the road width, the joint of each kilometer of the cement concrete road has two or three thousand long meters, and the joint of each kilometer of the cement concrete road has more than ten thousand long meters. If large cement pavement facilities such as airport pavement, bridges, tunnels, water conservancy, electric power and the like are not considered, the calculation is only carried out on all levels of cement concrete roads over ten million kilometers in China, if the traditional re-irrigation concept and process are still implemented, and the astronomical digital waste fillers outside seams are cleaned out of the seams once after re-irrigation, the natural degradation cannot be carried out, so that the serious pollution to the ecological environment of towns and farmlands around the highways in China can be caused, the years are over, the day is over, and the severity of the consequences cannot be estimated.

And fourthly, maintaining the cement pavement joint seam and filling asphalt, which is the biggest obstacle of the road for green development and recycling of the cement highway at present.

According to the research and statistics of the inventor in China, due to the reasons of economy, cognition and the like, the cement road is used in rural areas; the filling of asphalt into joints of cement roads in medium and small cities becomes a normal state; in the upper-grade cement highways, except for the few temporarily-unmodified high-speed cement highways, under the requirement of national rigidity, the joint maintenance adopts polymer filling materials, and in the joint maintenance of other upper-grade cement highways, asphalt or modified asphalt is mostly selected as the joint filling materials. Of course, this option is not only for reasons of cognition, but also for reasons of maintenance cost, but the consequences are very serious regardless of the reason.

Asphalt materials as road engineering materials have no alternatives at present, but are not optimal as cement road joint fillers, and the disadvantages are shown in the following five aspects:

1. the workability is poor.

Most of the common asphalt and modified asphalt fillers in the current market are hot-melt fillers, and can be filled after being heated and melted during filling construction in winter and summer, and particularly, can be constructed after being melted during construction in winter. Therefore, the manual or man-machine combined operation is very complicated;

2. the functional durability is poor.

Generally, after one winter and summer, the waterproof and sand-stone embedding resistance of the joint is greatly reduced;

3. the compatibility was poor.

The asphalt filler is not compatible and sticky with the common fillers made of other materials in the market.

Therefore, when the non-asphalt filler is needed to be filled, the cutting machine is needed to cut off the two walls of the joint adhered with the asphalt filler by 3-4mm to expose the natural color of cement, so that the newly filled non-asphalt filler can be adhered to the two walls of the joint;

4. the beautification ability is poor.

The temperature sensing performance of the asphalt filler is poor, when the temperature is high in summer, the asphalt filler in the joint can be softened and extruded out of the joint by the joint through thermal expansion deformation, and the road surface can be polluted after rolling by vehicles, so that the attractiveness is affected;

5. the material is not environment-friendly.

It is toxic to human and livestock, and has environmental pollution.

Why can asphalt materials with poor performance, complicated construction and serious pollution become the preferred choice for cement highway joint maintenance filler in various countries? According to the investigation and analysis of the inventor in many places in China, the reasons are two: one is cognitive cause. For a long time, the national relevant departments of administration only provide technical index requirements for fillers for seam maintenance, and the fillers in specific implementation are selected without rigid fine rules; the highway management departments at all levels of the local place mostly select ink conservation regulation, continue to use the tradition, do not think about new requirements, but have no way of seeking; the second is the cause of expenses. As a developing country, the road maintenance expenses allocated by the country are not abundant. In the case of no rigidity regulation on the joint filler in the state, the cheap asphalt filler becomes the first choice of the highway administration departments at all levels of the country and is also an understandable choice.

From the above, the cognition and the expenditure are the bottleneck of deasphalting of the cement joint maintenance filler in China. Therefore, how to break the bottleneck of cement road joint maintenance and promote the development mode of cement roads of all levels of China, which is accompanied by the current situation of economy of China, going green development and recycling, is an irreparable subject of all levels of highways and traffic governing departments.

Fifthly, the innovative development of the cement pavement joint maintenance technology in China is promoted, the cement pavement joint maintenance technology advances with time, and the extensive maintenance is developed to the precise maintenance; development from release management to normative management has become a new topic that needs to be carefully explored by various levels of functional management departments.

Since this century, with the rapid development of the economy of China, and particularly the vigorous development of the happy economy of the country and village, the rural roads mainly made of cement roads are rapidly developed under the promotion of the cognitive concept of wanting to be rich and repair roads first. According to the data released by the Ministry of transportation in 2021, rural roads in China reach 500 kilometers, the main body of the rural roads is a cement road, and with the implementation of the fourteen-five and fifteen-five-year plan in China, that is, the total mileage of the rural cement road in China is expected to reach more than 1000 kilometers after ten years. From the national perspective, including rural roads; various levels of roads in China; urban roads below the second-line city; various airport roads (roads) of all levels (military, commercial and general); various bridges, tunnels, water conservancy and electric power cement pavements, large facilities and the like at all levels form a huge cement pavement system. How to well maintain and manage the joints of the huge cement pavement system is an important agenda. Because, it is a huge national functional system that needs careful management; is also a huge national economic system which needs a large amount of investment;

the inventor thinks that how to make the two functional systems supplement each other, promote each other and develop harmoniously through management and investment, so that the cost performance of investment and income is high, the innovative development of the cement pavement joint maintenance technology in China is promoted, and the extensive maintenance is developed to the precise maintenance along with the progress of the technology; development from the release management to the standard management gradually creates a novel cement pavement joint maintenance mode with six advantages of economy, greenness, standardization, simplicity, convenience, high efficiency and safety, and is a new topic which needs to be seriously explored by all levels of functional management departments. Currently, this topic has not received sufficient attention due to the mislocalization of cognition and the constraint of the traditional concept.

Disclosure of Invention

Aiming at the problems mentioned in the background technology, the invention aims to provide a cement concrete pavement joint curing five, three and two technology to solve the problems mentioned in the background technology.

The technical purpose of the invention is realized by the following technical scheme:

a cement concrete pavement joint maintenance five-three-two technology comprises a framework I, a framework II, a framework III and a framework IV;

the first architecture is a five-year cycle, three nodes and a second segment of partition;

the framework II is three modes and three processes;

the third framework is segmented feeding and accurate maintenance;

the fourth framework is designed according to local conditions and overall planning; feeding in sections and maintaining accurately; the five-year period is adopted, and the circulation is promoted.

Preferably, the three maintenance time nodes in the first framework are respectively the 1 st, the 4 th and the 5 th years.

Preferably, the two-stage partition in the first framework is two maintenance time intervals, namely 1-3 years and 4-5 years.

Preferably, the second architecture includes three modes: the method comprises the steps of re-filling the joints with non-asphalt materials on the old road, initially filling the joints on the new road and reconstructing the joints with asphalt containing modified asphalt.

Preferably, in the third configuration: no maintenance is needed in 1-3 years, and accurate maintenance is performed in 4-5 years.

Preferably, the fourth architecture includes: planning overall according to local conditions; feeding in sections and maintaining accurately; the five-year period is adopted, and the circulation is promoted.

In summary, the invention mainly has the following beneficial effects:

the cement concrete pavement joint maintenance five-three-two technology is a new idea and new exploration of innovative development of cement concrete pavement joint maintenance technology with advanced times. The joint maintenance technology of various cement roads such as airport roads (roads), national and provincial main road highways, intercity roads, urban roads, rural roads and the like can be powerfully promoted, and the development from extensive maintenance to precise maintenance is realized; the release-type management develops to the standard management; a novel joint maintenance mode with six advantages of economy, greenness, standardization, simplicity, convenience, high efficiency and safety is gradually created.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

the framework II is three modes and three processes;

the third framework is segmented feeding and accurate maintenance;

the fourth framework is a comprehensive plan according to local conditions; feeding in sections and maintaining accurately; the five-year period is adopted, and the circulation is promoted.

Preferably, in the third configuration: no maintenance is needed in 1-3 years, and accurate maintenance is carried out in 4-5 years.

Preferably, the fourth configuration includes: planning overall according to local conditions; feeding in sections and maintaining accurately; the five-year period is adopted, and the circulation is promoted.

Example 2

A cement concrete pavement joint maintenance technology comprises the following steps:

when the joint is filled with the old road of the non-asphalt material for re-filling, the following steps are adopted: cleaning seams, filling and maintaining; when the new road joint is initially filled, the following steps are adopted: cleaning seams, embedding strips, filling and maintaining; when the old road is reconstructed after filling asphalt into the joints, the following steps are adopted: cutting seams, cleaning seams, embedding strips, filling and maintaining;

the seam is cleaned by a novel seam cleaning machine accurately according to the thickness required by the design and the widening or damage of two walls of the seam is avoided;

when the seam is refilled, the old filler in the seam is not required to be completely removed, only the aged surface layer of the old filler is required to be removed by 4-5mm, the old filler base with the thickness of more than two thirds or one half of the thickness of the seam and the unaged old filler base are still remained in the seam for recycling, and a new material with the depth of 4-5mm is filled in the seam under the condition of keeping the inside of the seam clean and dry;

when filling, the self-leveling filler is adopted, and the filler is compatible and adhesive with polyurethanes, silicones and polysulfide rubbers; the filler can mutually permeate, bond and contain the base of the old filler with the thickness of two thirds or half of that of the old filler remained in the joint, and the filler becomes a new whole with flat and smooth surface;

during maintenance, dividing the seam maintenance into two maintenance time periods of 1-3 years and 4-5 years, and carrying out sectional investment and accurate maintenance; manually detecting debonding of seam wall, defect of filler, surface layer of filler and two walls of seam, and manually maintaining; and cleaning the seams of the affected road sections by adopting matched special equipment, wherein the depth of the cleaned seams is 4-5mm, and filling 4-5mm of thin-layer matched materials into the cleaned seams to recover the seam function.

When the joint is filled with the old road of the non-asphalt material again, the joint cleaning specifically comprises the following steps: on the premise of not damaging two walls of the seam, removing 4-5mm aged parts on the surface layer of the old filler in the seam according to the aging condition of the old filler in the seam; and (5) cleaning the seam by using a high-pressure air pump, and keeping the inside of the seam clean and dry.

Wherein, in the joint filling and filling of the old road of the non-asphalt material, when filling, the base part of the old filling remained in the joint is used as a backing embedded strip and is filled with the matching material with the depth of 4-5 mm; curing for 1.0-1.5 hours.

In the initial irrigation of the new road joint, two walls of the joint are polished, and mud, sand and cement dirt in the joint depth of 20-25mm are removed; and when the seam is cleaned by the S12, cleaning the seam by the high-pressure air pump, and keeping the inside of the seam clean and dry.

In the primary irrigation of the new road joint, after the optimal filling depth is determined during the embedding, embedding the backing embedding strips according to the depth requirement, and considering the depth reserved space without filling of 2-3 mm; curing for 1.0-1.5 hours.

In the old road reconstruction after the joint is filled with asphalt, the depth of two walls of the joint is mechanically cut to be 20-25mm, and the asphalt filler and the sand stone in the depth of 20-25mm in the joint are thoroughly removed; the old asphalt material and sand with the depth of less than 20-25mm are not required to be removed.

Wherein, in the filler, when the optimal filler depth is determined, the rural highway is 8-10 mm; 10-12mm of a common road; 12-15mm of high-grade road.

In the filling, when re-filling, new filling or old road reconstruction is carried out, a reserved space with the depth of 2-3mm is added on the optimal filling depth, and no filling is carried out.

Example 3

The cement pavement joint maintenance has unique concept, advanced process, innovative materials and novel equipment, combines the four materials, complements and supplements the advantages, and is a new idea and a new exploration for the innovative development of the joint maintenance technology with the advancement of times. The technology takes five years as a curing period, and the five years are divided into curing time periods of 1 to 3 years and 4 to 5 years through three time nodes of 1 st, 4 th and 5 th years, and then are put into sections and cured accurately.

With the cyclic promotion of taking five years as a curing period, the method can effectively promote various cement pavement joint curing technologies of various levels in China, and the development from extensive curing to precise curing is realized; the release-type management develops to the standard management; a novel joint maintenance mode with six advantages of economy, greenness, standardization, simplicity, convenience, high efficiency and safety is gradually created.

Firstly: when the seam is irrigated again, the two walls of the seam are not widened manually.

1. After joint re-irrigation, two walls of the joint are artificially widened, so that joint damage and function failure are caused, the joint is the cement pavement in China and is the most common and serious artificial damage mode, and the effective function service life of the cement pavement in China is generally shorter than the design requirement for 5-10 years.

At present, the cement pavement joint maintenance in China still implements the idea and process of full-clear and full irrigation. That is, when the joint is refilled, all the old filler in the joint must be removed from the joint and then filled with new filler. To remove the old material from the joint completely, the two walls to which the old filler is adhered must be cut by a cutting machine with a thickness of 1-2mm each, with the consequence of widening the gap between the two walls of the joint, which is typically 3-4mm for each repeated pour, as shown by data collected by the inventor over the years: irrigating the seams more than twice, wherein the seam width can be expanded to more than 10-12 mm;

with the continuous widening of the seam, the damage risk of 'water damage' is greater and greater; the time for road surface to have diseases such as mud pumping, slurry bleeding, edge gnawing, dislocation, cracks and the like is getting earlier and earlier; the comfort and the safety of the vehicle are worse and worse; the effective functional life of cement pavements is also becoming shorter and shorter. Of course, the reasons for this situation are manifold, but it is undeniable that the damage and the loss of function of the joint caused by widening the two walls of the joint are the main causes. Statistical data, variously investigated by the inventors, show that: the effective functional life of the cement pavement in China at present is generally shorter than the design requirement of 5-10 years.

In order to inhibit the damage of the 'water damage' to the cement road from the source; effectively postponing the occurrence time of various diseases of the cement road; the effective functional life of the cement road is effectively prolonged, and the inventor thinks that when the joint is irrigated again, the inventor must adhere to a novel idea that two walls of the joint are not widened manually any more.

A novel seam cleaning machine must be designed, the technical requirement of the first idea can be met, and the first idea is implemented.

The novel joint cleaning machine can accurately clean the surface layer of the old filler in the joint according to the thickness required by design, and can not widen or damage two walls of the joint.

When the seam is refilled, the old filler in the seam is not required to be completely removed, only the aged surface layer of the old filler is required to be removed by 4-5mm, and the old filler base with the thickness of more than two thirds or one half of the thickness of the seam and which is not aged is still remained in the seam for recycling. And filling a new material with the depth of 4-5mm under the condition of keeping the inside of the joint clean and dry.

The method provides technical feasibility and practical operability for maintaining the cement pavement joint maintenance technology in China and insisting on green development and recycling. The specific analysis is as follows: after the filler is filled into the joint, the filler can be gradually aged along with the time under the repeated action of factors such as rainwater, temperature, sunlight, mechanical abrasion and the like. But the fastest aging is the seam skin material layer exposed to sunlight and mechanical abrasion. The inventor collects relevant data of various levels of roads and various types of old fillers on site, and the conclusion obtained by comprehensive analysis is as follows: the old filler used for more than 5 years only has the thickness of 2-3mm of the surface layer and can be aged in different degrees; and the base part with the thickness of two thirds or more than one half of the whole filler is not aged, still can keep better color, elasticity, strength and bonding capability, and still has excellent use value. The inventor believes that if seam maintenance is carried out, the old filler in the seam can be removed completely, only the surface layer with the thickness of 4-5mm of the old filler needs to be removed, and the old filler base with the thickness of more than two thirds or one half of the thickness of the seam and which is not aged is still remained in the seam for recycling; and filling a new material with the depth of 4-5mm under the condition of keeping the inside of the joint clean and dry. If the new and old fillers are compatible, sticky and mutually infiltrated and mutually contained to form a whole with a flat and smooth surface, the use function and the use durability of the joint can be fully ensured.

In the joint maintenance engineering of cement pavements in China, if the advanced concept of recycling and making the best use of things can be implemented, huge economic benefits and social benefits can be generated;

according to the traditional full-clean full-irrigation maintenance concept and process, the old fillers in the seams are required to be completely cleaned out of the seams. In general, the waste filler removed from the joint is mostly discarded at the periphery of the construction road; none of these old fillers, consisting of polymer chemicals, will degrade automatically under natural conditions.

The inventors initially estimated: if estimated according to the width of the road width, joints of each kilometer of the cement road have two or three thousand long meters, and more joints have more than ten thousand long meters. If large special cement pavement facilities such as airports, bridges, tunnels, water conservancy and electric power are not considered, and the large special cement pavement facilities are calculated only by cement roads at all levels of more than ten million kilometers in China, the cement roads are implemented according to the traditional maintenance concept and process, and the cement roads are abandoned near towns and farmlands around the highways once every time of irrigation, and the severity of consequences cannot be estimated due to the fact that astronomical waste old fillers cannot be naturally degraded and are accumulated in the month and day. However, with the implementation of the second concept, the environmental protection disaster in the seam maintenance process can be scientifically, economically and skillfully solved easily.

2. The novel joint material which is customized for the second idea and has unique technical advantages is a technical guarantee for implementing the second idea.

Novel joint materials, which require excellent flowability and permeability; but also can be compatible and sticky with various types of seam materials in the market.

After the novel joint material is filled into a joint, the joint material can automatically level, and can be mutually penetrated, mutually bonded and mutually contained with an old filler base with the thickness of two thirds or one half of that of the old filler base retained in the joint to form a new whole with a flat and smooth surface, so that the use function and the use durability of the joint can be ensured.

The idea three: the scientific concept of using good materials and using few materials is adhered to, namely, the high-quality filler is adhered to; the amount of the filler is scientifically reduced; on the premise of ensuring the high quality of the filler, the investment of maintenance cost is reduced by reducing the using amount of the filler; from the cognition angle of methodology, the bottleneck that the quality and the expenditure are mutually restricted in seam maintenance is broken; asphalt filler with poor quality and serious pollution is abandoned in joint maintenance, and polymer filler with high quality and environmental protection is used to promote green development of joint maintenance.

From the cognition angle of methodology, a green development way is provided for cement road joint maintenance, and technical feasibility is provided. Currently, with the implementation of the combination, from the cognitive concept of methodology, space and operability are provided to reduce the cost of seam maintenance. Whether the asphalt is filled into the joints or not is no longer an economic problem when the old cement road is maintained after the asphalt is filled into the joints, but the traditional method is kept in a comparative way with two maintenance concepts. In fact, only 5-7 yuan is needed to be thrown in one time, the asphalt in the joint can be replaced by the polymer filler, the old cement road filled with the asphalt in the joint can be made, the asphalt is distinguished, and the green development road is developed.

The first curing mode: filling the joints with non-asphalt materials for the old road:

1. on the premise of not damaging two walls of the joint, removing 4-5mm aged parts on the surface layer of the old filler in the joint by using special equipment according to the aging condition of the old filler in the joint;

2. cleaning the seam by a high-pressure air pump, and keeping the inside of the seam clean and dry;

3. and (3) taking the old filler base remained in the seam as a backing filler strip, and filling the old filler base into the old filler base with the depth of 4-5 mm: high-elasticity sealing material of cement pavement joint polymer;

4. the new and old fillers filled in the seams are mutually soaked, mutually bonded and mutually contained to form a whole; after curing, the surface is flat, the interface is eliminated, the surface is smooth as new, and the surface is firmly bonded with the two walls of the joint;

5. and curing for 1.0-1.5 hours to open the traffic.

(II) a second curing mode: initial irrigation of new road seams:

1. polishing two walls of the joint by using special joint maintenance equipment, and removing dirt such as sand, cement scale and the like in the depth of the joint of 20-25 mm;

3. after the optimal filling depth is determined, embedding a back lining embedded strip according to the depth requirement;

4. filling the matched material according to the selected filling depth requirement;

5. and curing for 1.0-1.5 hours to open the traffic.

(III) a third curing mode: and (3) reconstructing an old road after filling asphalt into a joint:

1. mechanically cutting the depth of two walls of the joint to be 20-25mm, and thoroughly removing asphalt filler and sand stone in the depth of 20-25mm in the joint; old asphalt materials and gravels with the depth of less than 20-25mm can be removed without cleaning;

4. according to the determined optimal filling depth;

5. and curing for 1.0-1.5 hours to open the traffic.

(IV) optimal filling depth:

the optimal filling depth is preferably 8 to 15 mm. The subdivision can be in three levels: 8-10mm of rural highways; 10-12mm of a common road; 12-15mm of a high-grade highway;

(V) depth reservation space:

when the filling is carried out again, newly or old road reconstruction is carried out, the reserved space with the depth of 2-3mm is added on the optimal filling depth to avoid filling, so that the filling is prevented from being extruded out of the seam when the seam is subjected to thermal expansion deformation.

Segmented feeding and accurate maintenance

And (4) taking five years as a period, dividing the seam maintenance into two maintenance time periods of 1 st to 3 th and 4 th to 5 th, and performing sectional investment and accurate maintenance. The specific operation is as follows:

in three years of 1-3 years: the incidence rate of seam functional diseases is low, more than 90 percent of seams can ensure normal functions, and investment and maintenance are not needed;

in two years of 4-5 years: planning overall, regularly patrolling, discovering the disease, accurate maintenance:

(A) local diseases are treated manually;

1. 3 combined, pickup motorcycle; disease is found, and a surface layer is treated; brushing and grinding manually, and cleaning seams by electric blowing; the natural color is displayed, and the product is clean and dry;

2. constructing at normal temperature, and carrying out field seasoning; small-sized package, single person operation; the construction is convenient, and the quantity control is accurate; injecting new materials and automatically leveling; compatibility and mutual adhesion, and new and old accommodation; curing the surface layer, and releasing;

3. packaging and maintaining a plurality of points; repairing and repairing in a minor repair way, and processing in time; the device is flexible, accurate and efficient; economical, practical, labor-saving and material-saving.

(B) The road section is long, and the equipment processes:

if the damaged road section is long, matched special equipment can be used for cleaning and cleaning the gap of the damaged road section, and then 4-5mm of thin-layer matched material is filled in the damaged road section, so that the function of the gap can be recovered, and the damaged road section is refreshed.

Conditions for ensuring the implementation of the invention

The high-elasticity sealing material of the cement pavement joint polymer is different from common polyurethane, silicone and polysulfide rubber joint filling materials in the current market. The polymer elastomer material is used as a base material, a polymer blending composite synthesis technology is adopted, the technical advantages of various polymer materials are integrated, and the polymer elastomer material belongs to a double-component polymer high-elasticity seam filling material with unique technical characteristics in China. The product can be divided into three products, namely county and county type, road type and airport type, and can be selected by users.

1. Has excellent fluidity and wettability.

The filler filled in the seam can automatically level and can mutually infiltrate, mutually permeate and mutually contain the old filler in the seam to form a new whole with flat and smooth surface.

2. Has broad compatibility and interlayer adhesion.

Can be compatible and adhesive with various common gap filling materials in the current market.

The selection of the filler is an important link. If the new material filled into the joint can meet the two basic technical requirements, the new material can be fully permeated and bonded with the old material in the joint to form a new whole with a flat and smooth surface, so that the use function effect and the use durability of the maintained joint can be ensured;

on the contrary, if the new materials filled into the joints during maintenance can not meet the two basic technical requirements, the new and old fillers in the joints can not mutually permeate and bond, and are mutually contained to form a new whole; after the filler is cured, the new and old filler interfaces are debonded or layered, so that the service function effect and durability of the cured seam are greatly reduced.

3. The curing and forming time is quick, and after the filler is poured into the joint, the traffic can be opened within 1.0-1.5 hours, so that convenience can be provided for a complex traffic environment.

The method is particularly suitable for road construction sites with complex traffic environments, such as airport runways, expressways, intercity roads, urban roads, rural roads and the like.

4. The environmental suitability is excellent.

The method has excellent adaptability in various regions and various climatic environments: the material performance is unchanged, the construction advantages are unchanged, and the use function is unchanged.

5. The material is green and environment-friendly.

No pollution to air; no harm to human and livestock; is very friendly to the environment.

Compared with the prior joint maintenance technology, the cement concrete pavement joint maintenance five-three-two technology has the following five technical advantages:

the first major technical advantage: when the seam is irrigated again, the two walls of the seam are not widened manually. The method has the greatest advantages that the occurrence of cement concrete road diseases can be reduced to the greatest extent; the process of the cement concrete road in the disease high-incidence period can be effectively delayed; thereby prolonging the service life of the effective functions of the cement concrete road by 5 to 10 years.

According to the current situation of cement concrete roads in China, with the development of the happy economy of the country, the rural highways mainly made of the cement roads are rapidly developed under the promotion of the cognitive concept of first repairing roads to be rich. In 2021, the country promulgates that the cement road is the main part of the rural highway up to 500 kilometers, and the total mileage of the rural cement road is estimated to reach more than 1000 kilometers within ten years of the plan of 145 and 155 for five years. That is, in the coming decade, an emerging rural cement highway network is created; the expanded developing national cement trunk grade highway with the country and provincial road as the main body; urban cement roads below the second level city; various airport pavement of all levels; various cement concrete bridges and tunnels at various levels; various water conservancy and electric power cement facilities and cement pavements at all levels; subways, high-speed rail cement road surfaces, station yards and the like can form a huge cement concrete road surface network system. If the components are used for maintaining the joints, huge economic benefits and social benefits can be generated for national economy of China.

The second major technical advantage: when the joint is refilled, the old filler in the joint does not need to be completely removed from the joint, but only the aged surface layer of the old filler is removed by 4-5mm, so that the old filler base with the thickness of more than two thirds or one half of the thickness of the joint and the unaged old filler base still remain the idea of recycling in the joint, and the pollution of the waste in refilling the joint to the environment can be effectively reduced.

We can roughly estimate the road width: the joints of cement roads in each kilometer are two or three thousand long meters, and the joints are more than ten thousand long meters. If the cement road facilities such as airport roads, bridges, tunnels, water conservancy, electric power and the like are not considered, the cement road facilities are calculated only by various cement roads over ten million kilometers all levels in China, if the cement road facilities are still implemented according to the traditional re-irrigation concept and process, the astronomical digital waste filler removed from the joint is removed once after re-irrigation, and because the natural degradation cannot be carried out, the pollution to the ecological environment of towns and farmlands around the highways in China can be caused, the cement road facilities are accumulated in months and days, and the severity of the consequences can not be estimated;

in fact, if the method is implemented according to the idea and the process advocated by the invention, two thirds or more of the old filler base with unaged thickness still remains in the joint for recycling, so that the resource saving and the full use of the materials are realized, and the problem that the old filler pollutes the surrounding environment in the joint maintenance is scientifically, economically and skillfully solved; and space and operability for reducing the joint maintenance cost are provided for the implementation of joint maintenance engineering, so that the joint maintenance method has excellent economy.

The third technical advantage: the method adheres to a scientific concept, and scientifically and skillfully solves the contradiction of mutual restriction of quality and expenditure in seam maintenance from the cognitive perspective of a methodology. With the implementation of idea recognition, asphalt fillers with poor materials and serious pollution are abandoned for seam maintenance, high-quality and environment-friendly polymer fillers are used constantly, technical feasibility and practical operability are provided, the old way of filling the seams with asphalt can be realized, the asphalt is distinguished, and the way of green development is developed.

The fourth major technical advantage: the invention can not damage the panel of the cement concrete road, and can effectively keep the visual beauty, the driving comfort and the traffic safety of all levels of cement roads for a long time.

The fifth great advantage is that: the invention relates to a management and cultivation concept innovation in management and cultivation work of various levels of highway management departments. It can not only simplify the road management and maintenance procedure; the management and maintenance work efficiency is improved; resources can be recycled, and the consumption of manpower and financial resources is reduced; the management and maintenance work can be done with half the effort and make the best use of things.

Embodiments of the invention

The first embodiment is as follows: in 2018, 12 months, the inventor carries out recharge maintenance on cement concrete joints of Shanfen, Guangdong province, such as Shantou to Fenshuiguan, at a high speed, and the maintenance work amount is 268588 linear meters. The Shanfen highway is a bone beam of a two-longitudinal-two-transverse highway in China, an important section of a main trunk line of a three-highway from Heilongjiang to Nanhai in Guangdong province is a traffic main trunk line connecting three special economic regions of Guangdong Shantou, Shenzhen and Fujian Xiamen, and the highway is numbered as G15.

The specific engineering implementation process is as follows:

1. on the premise of not damaging two walls of the seam, removing 4-5mm aged parts on the surface layer of the old filler in the seam by using special equipment according to the aging condition of the old filler in the seam;

3. filling the old filler base retained in the seam as a backing fillet into the supporting material with the depth of 4-5 mm;

4. the new and old fillers filled in the seams are mutually infiltrated, mutually bonded and mutually contained to form a whole; after curing, the surface is flat, the interface is eliminated, the surface is smooth as new, and the surface is firmly bonded with the two walls of the joint;

5. and curing for 1.0-1.5 hours to open the traffic.

The three modes are as follows:

three modes, three processes

The specific operation can be as follows:

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

1. A cement concrete pavement joint maintenance five-three-two technology is characterized in that: comprises a first framework, a second framework, a third framework and a fourth framework;

the framework II is three modes and three processes;

the third framework is segmented feeding and accurate maintenance;

the fourth framework is designed according to local conditions and overall planning; feeding in sections and maintaining accurately; the five-year period, circulation propulsion.

2. The cement concrete pavement joint maintenance five-three-two technology as claimed in claim 1, wherein: and the three maintenance time nodes in the first framework are respectively the 1 st, the 4 th and the 5 th years.

3. The cement concrete pavement joint curing five, three and two technologies as claimed in claim 1, wherein: the two sections of the framework I are divided into two maintenance time intervals, namely 1-3 years and 4-5 years.

4. The cement concrete pavement joint curing five, three and two technologies as claimed in claim 1, wherein: the three modes in the second architecture include: the method comprises the steps of re-filling the joints with non-asphalt materials on the old road, initially filling the joints on the new road and reconstructing the joints with asphalt containing modified asphalt.

5. The cement concrete pavement joint maintenance five-three-two technology as claimed in claim 1, wherein: in the third architecture: no maintenance is needed in 1-3 years, and accurate maintenance is carried out in 4-5 years.

6. The cement concrete pavement joint maintenance five-three-two technology as claimed in claim 1, wherein: the fourth architecture comprises: planning overall according to local conditions; feeding in sections and maintaining accurately; the five-year period is adopted, and the circulation is promoted.