Recently，With the completion of the construction site at 30 kilometers of Shenhai Expressway in Dalian direction,，The large-scale maintenance project of Liaoning Expressway was completed in 2024.。It is reported that，This project involves nearly 4000 single-lane kilometers of maintenance mileage of 10 expressways in the province.。Construction began on May 15.，It lasted 136 days，It was completed 20 days ahead of schedule.。

In the process of implementation，Liaoning Trading High-speed Operating Company overcomes the large volume of projects implemented in the same period、The construction sites are numerous and scattered、Difficulties such as construction while opening to traffic，In the construction organization、Quality Control、Security management、A series of measures have been taken in the application of new technologies.，High standards and high quality have achieved the expected goals.。

New technologies and techniques are widely used in this large-scale expressway maintenance project.，It not only saves expenses.，It also provides experience for the industry to learn from.。According to introduction，Such as Shen Da、Dan Hai、Panhaiying Project is under construction for 484 km in both directions，The application of low-carbon road recycling technology and 3D Milling and paving technology, etc.，A total of 35 old pavement materials are used.80,000 tons，Reduce sand and gravel mining 32.60,000 tons、New asphalt production 1.50,000 tons，Reduce carbon emissions3.60,000 tons，Reduce the project cost by 74 million yuan，Accounting for 6% of the total project cost.6%。（Source of information：Liaoning Daily、Liaoning trading official website）

New technology to solve unevenness“Persistent illness“

Soft Foundation Pavement of Panhaiying Expressway，Due to years of operation，There is a large problem of uneven settlement.，Poor flatness。Especially after the settlement of the bridgehead pavement.，The height difference with the bridge deck increases obviously.“Jump at the bridge head”Question。

   Cracks caused by settlement at both ends of the culvert

If conventional milling methods are used，The milling depth is automatically adjusted by leveling the side plate of the milling machine.，Limited by the length of the milling machine side plate itself，The range of leveling shall not exceed 2 meters.。Dealing with a wide range of road irregularities，The overall pavement flatness after milling is not satisfactory.。

And“Jump at the bridge head”The precise leveling depends on the skill level of the operator.，The effect is difficult to guarantee。In this context,，Even if the subsequent paving process of balancing beam leveling is adopted，It can not fundamentally solve the problem of the smoothness of the original pavement.，The compacted pavement is still prone to uneven thickness.，Affect the overall driving experience。It is necessary to cure the stubborn disease，It is necessary to prescribe the right medicine，Therefore, the project applies new technologies.，Wittgen“3D”Differential Intelligent Milling and Fogler 3D Automatic paving technology，The actual construction effect has solved this difficult problem satisfactorily.。

“3D”Differential Intelligent Milling and Paving Technology

In the milling process of pavement，Wirtgen large milling machine W 205i By circumscribing the number 3D The device achieved 3.D Differential intelligent milling。That is to say, before the milling operation, the road surface to be milled should be measured accurately.，A milling target model is established on the basis of the data as“Absolute reference”。

The model data is then input to the controller，W 205i The milling depth can be adjusted in real time according to the fluctuation of the original road surface., So that that intelligent differential mil is performed accord to the milling target plane。

Thanks to the assembly of Wittgen large milling machine WIDRIVE Intelligent control system，Can be connected with external 3D Digital systems are well integrated，Through the sensitive control of the whole machine，Precise execution of digital instructions，It fully reflects the effect of precise guidance of digital technology.。

This technology not only greatly improves the flatness of the milling surface,，More in“Jump at the bridge head”The smooth transition of the road section has been realized.，Lay a solid foundation for the subsequent paving work。

Spreading and compacting，Intelligent escort throughout the journey

Subsequent paving phase，Fogler's 3D Intelligent paving technology also plays an important role.，Navitronic Plus 3D Automatic control system，Fully automatic screed width control，Travel and steering of paver，There is no need to set guide lines，The laser total station can make it drive automatically along the designated route.。

And the subsequent compaction，It relies on Hummer's intelligent high-frequency compaction technology.，High efficiency is achieved、Quick compaction operation，High flatness and durability of the final pavement is ensured。

3DIntelligent control system guides paving construction operation

In addition to high quality construction results，Wittgen 3D Intelligent milling and paving technology can also minimize the waste of raw materials and a lot of time.、Labor cost，Achieving economic and environmental benefits through intellectualization and technological innovation，Help customers reduce costs and increase efficiency。

This Wittgen 3D Intelligent differential milling and 3D Successful Application of Intelligent Paving Technology，By conquering“Persistent illness”，It not only verifies its remarkable effect on improving the overall pavement smoothness, but also verifies its effectiveness.，It also sets a new benchmark for the quality and efficiency of highway pavement maintenance projects.。

This technology is used in highway maintenance projects.，Maintenance on municipal main road（Click to learn more）、Repair of racing track（Click to learn more）There are also many successful applications in various pavement conditions.。To learn more about Wirtgen Group 3D Digital Construction Solution Information，Welcome to November 26.-Held at the Shanghai New International Expo Center on the 29th bauma 2024 Construction Machinery Exhibition，EPavilion 1E1.Visit booth 510，On-site communication with the expert team of Wirtgen Group，To provide you with more targeted professional advice。

Source of project information：Liaoning Daily、Liaoning trading official website