The golden autumn season，Road doctor with independent research and development“Self-excitation minimally invasive reinforcement technique”And“Hot in-place recycling technology”Come to Nanchang，In Nanchang CityG105、G320、S215 and other national and provincial highway major and medium repair projects to show their skills.，It was highly affirmed by Nanchang Highway Development Center.。The following is the full text of the report of Nanchang Highway Development Center.。
Explore the new technology of road maintenance, press the road maintenance“Shortcut key”
With the development of highway construction,，Traffic is increasing day by day，The road surface is facing more and more severe tests.。Crack、Pothole、Subsidence and other diseases seriously affect the performance of pavement.，It poses a direct threat to the safety of Vehicle driving.。Repair these diseases as early as possible.，It can not only prolong the service life of the road，But also can ensure the safety and the comfort of the driving of the Vehicle.。
In order to improve highway traffic conditions,，Improve the highway environment，Nanchang Highway Development Center Deeply Implements the Strategic Requirements of Transportation Power，Focus on building an intensive and economical green transportation system，In this yearG105、G320、S103、S215、SInsist on innovation and guidance in 416 large and medium-sized repair projects，Accurate application of classification“Cycle、Low carbon、Economy”Key Technology of Highway Green Maintenance，Cracking the waste of old materials in traditional highway maintenance、It produces a lot of pollution、Large consumption of resources such as new sand and stone materials and the like.，Walk out of a green development road of highway energy saving and emission reduction in Nanchang。
The major and medium repair project of national and provincial highways in Nanchang，It is constructed by Nanchang Highway and Bridge Engineering Co., Ltd.，And introduced the application.“Road doctor”Intech's Trenchless Minimally Invasive Reinforcement——“Self-excitation minimally invasive reinforcement technique”To solve the problem of road base，At the same time, it is introduced“Hot in-place recycling technology”A variety of processes to repair the damaged pavement regeneration.。According to the research data of the Chinese Academy of Sciences.，This application of green new technology，Tons 40000 of waste will be avoided，Reduce exhaust emissions by 5.19 million cubic meters，Total energy saving(Equivalent to standard coal)About 3000 tons，Save about 20% of the construction cost%，And that construction period is greatly shorten.。
From“Operate”Go to“Minimally invasive”
For road base problems，It is usually used“Disembowel”Excavated and backfilled for maintenance.，That is, excavate the road surface and damaged base material，Restoring the structure layer again，Lay the surface course。Although the traditional method is relatively simple.，However, with the continuous improvement of the public's requirements for the quality of traffic travel,，The government pays more and more attention to the protection of the ecological environment.，The drawbacks of excavation and backfilling methods have become increasingly prominent.，The main manifestation is the long construction period.；Long-term traffic closure，Affect the travel of citizens；Environmental pollution is serious；The cost is high，Government investment is large；Public opinion is under great pressure。
So，In order to improve work efficiency、And that maintenance cost is reduce，Nanchang Highway Development Center entrusted Nanchang Highway Survey and Design Institute to conduct a precise physical examination of each road in the early stage.，Deflection detection、3DGround penetrating radar detection、Coring、Combination of sampling and other detection methods，Final adoption“Minimally invasive reinforcement”——Self-excitation minimally invasive reinforcement technology for road structure layer repair。This technology is mainly through professional dust-free drilling equipment to drill holes first.，Then the silica-alumina based polymer material is produced by professional pulping equipment.，Finally, the grout is injected into the road structure layer for reinforcement.，Traffic can be opened within 3 hours after grouting and curing。The introduction of road silica-alumina grouting technology to reduce the damage to the original pavement，And that generation of waste is reduce，Shorten the construction period by nearly 50 percent%。
From“Discard”Go to“Regeneration”
For road surface problems，The method of milling and resurfacing is usually adopted，Simple and crude，But that would be a huge waste of resources.、Dust pollution、Rock quarrying、Traffic impact and other issues.。With the country“The carbon reaches the peak and is neutralized”Strategic landing，“Fourteen five”Task requirements for high-quality development of highway maintenance，Road maintenance is bound to follow a path.“Regeneration”The road，Protect lucid waters and lush mountains。
Hot in-place recycling technology is a preventive maintenance technology.，It is a dedicated hot in-place recycling equipment.，Heating of asphalt pavement、Rake loose，Mixing a certain amount of new asphalt in situ、New bituminous mixture、A regenerant, etc，After hot mixing、Spreading、Rolling and other processes，Technology for realizing regeneration of old asphalt concrete pavement within a certain depth range of the surface at one times。It has the advantages of fast construction speed,、Excellent anti-rutting performance、Zero pollution、Environmental protection construction、Small traffic impact and many other advantages。
Provincial RoadSThe 215 maintenance project adopts self-excitation minimally invasive reinforcement. + Combination of two process of hot in-place recycling,And that construction efficiency is greatly improve.，The construction period is shortened，100%Recycle the old asphalt pavement material，It can not only save a lot of material resources,，And that construction cost is reduce，It also reduces carbon dioxide emissions.，Avoid environmental pollution，Really realize the green maintenance of highway。
Next step，For Repaired Pavement，Nanchang Highway Development Center will continue to do a good job of tracking and comparison，In the future road maintenance work，Continue to adhere to innovation to lead technological development，Actively explore and apply new technology、New technology、New materials,Continuously improve the level of highway maintenance，Prolong the service life of road。
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