The following video is fromTrimbleTianbao
01
Project overview
Luxembourg Airport in Findel is an important cargo hub in Europe.。In order to improve operational efficiency，Ensure flight safety，The airport needs to completely renovate and repair a 4,000-meter-long and 60-meter-wide runway that has been in operation for 30 years.。
Airport operators are demanding that runway resurfacing be completed without affecting daily flight movements.。Considering the speed、Factors such as flexibility and quality，The operator decided to pave a new runway with a different layer of asphalt over the existing runway.。They plan to use the Milling Machine to correct the runway surface first.，Then the asphalt is paved by an asphalt Paver.，Then reopen the runway every morning.，Resume normal operations at the airport。
Single of Milling MachineTrimble MT900 Vehicular TargetTrimble GS420 Mechanical control sensor for compensation。The milling depth can be detected manually，Verification of subsequent asphalt paving volume by dimensional inspection。
This is a high precision、A highly complex task，Without the slightest delay.。The success of this project.，Thanks to a highly skilled team.、3DMechanical navigation andTrimbleThe company's advanced technology。
02
The clock is ticking
At the beginning of the project，The airport has set a night construction period for the construction team.，From 11 p.m. to 6 a.m.，The project is expected to take between 210 and 220 nights to complete。
Head of Measurement Department of Construction TeamChristophe LatteurSay：“If not 3DMechanical control，Use only traditional workflow，It is impossible to finish the project.。We understandTrimbleEquipment and its working principle，And we have verified its reliability.。”
03
High precision target
The team is first based on the measurement data provided by the subconTractor.，A digitization project was created by scanning a point cloud through mobile mapping.。Then, based on these data and the required runway profile,，Further create a detailed daily work schedule。
Coming up，Construction team equips Miller and asphalt Paver with 3DMechanical Control System。The system consists ofTrimble CB460 Control boxAndMT900 Vehicular TargetComposition。The team uses two to four every night.Wirtgen W200 andW210FiMilling Machines and up to 8Vögele Super 1800-3 andSuper 2100-3 Pavers to refurbish runway。More than 16Trimble SPS930 robotic total stationUsed to direct and control construction。
“Our total station is equipped with high-precisionCDDSensor。SPS930 The transmitted signal is reflected by the target.，Height accuracy of 1 mm at 200 m。”TrimbleCivil Engineering Business Development ManagerNorbert MattiviSaid。
The total station transmits the prism coordinate position by radio 20 times per second to theCB460 Control box。In addition to the system，The team still uses itTrimble TCS3 andTCS7 Data controllerSet the total station，And check the flatness of the milled and paved surfaces。The entire operation required more than 240 people and over 100 machines and Trucks to complete.。
04
Active tracking technology
Every night at 11:00，The team members will be in position.，Each performs its own duties，The total station also began to control and guide the machine.。
The first operation is to pair the mechanical equipment with these total stations.。“Each oneMT900 will send a signal with a unique code.，Received by the total station responsible for tracking the target，”MattiviSaid，“This isTrimbleOne of the advantages of the system。Each robotic total station tracks only one prism，And lock it。Even if the Truck passes between the two prisms.，It will not be affected.。”
In addition，The total station is erected on a 3-meter-high tripod behind the paver.，To avoid interference with the light by the Compactor at work。
TinyRobotsIs an autonomous main line pre-marking solution，EquippedTrimble SPS986 GNSSSmart Antenna，Every night it marks the milling area first。 Then ，ByTrimble PCS900 paving control systemThe controlled milling machine can start to work.。MattiviExplained：“These machines are equipped with aMTSingle mast for 900 Vehicle-mounted target。So，We have a high point.，CombineTrimble GS420 Mechanical Control Sensor，Milling accuracy up to±3 mm，Working speed up to25 meters/Minute。”After measuring the milling depth，Construction personnel clean and apply adhesive emulsion，The asphalt can be laid.。
Trimble TSC7 Data controller is used for initial positioning of total station.、Control work and programming of micro mobile robot。
05
Work in groups
Pavers work in groups。The first paver works on the left side of the runway axis.，3 on both sidesDGuidance，And provide level and slope information 10 meters wide。The second paver is also equipped with a 10-meter wide screed.，On the right side of the runway axis，Obtain information from the left paving layer by ultrasonic and work。The construction team used this mode of work to complete the paving work of the entire runway.。
“We laid two to seven layers of asphalt.，The average thickness of each layer is 4.5 cm，Maximum thickness of each layer is 10 cm.，”LarherSaid，“The paving thickness depends on the area and the gap between the old pavement and the target pavement。We laid a maximum of 37 centimeters of asphalt.。”
Every night，The construction team has to complete 150 meters to 300 meters of new pavement.。
06
Truck fleet
The asphalt for the paver is provided by two factories near the site.，On average, 2500 tons of asphalt are laid every night.，The equivalent of 60 to 65 trucks，It does not include trucks that transport milling materials.。
“Actually，In our allotted time period，Milling work around 1 a.m.:End at 30，The next hour was spent laying and compacting the asphalt。It takes two hours for the asphalt to go from 160.℃ Cool to 60℃，This is also the maximum temperature allowed to reopen the runway.。”LarherSaid。
“This is owned by 3.DAnother advantage of the model，”MattiviAdded，“Not only can project specifications be accurately met，It can also calculate the production required every night.、Quantity of bitumen transported and used。”
Asphalt pavers are equipped with screed widths up to 10 meters.。Location according to paver settings，Use one or twoTrimble MT900 Vehicular Target。The paver consists ofTrimble PCS900 Paving Control System andTrimble SPS930 Robot Total Station with 3DWay to guide。
