North Ring Section of the Second Ring Road of Jinan Ring Expressway（Including the Yellow River Bridge）The starting point of the project is located in the southwest of Wharf Town, Zouping City, Binzhou.，North of Huanghe Town, Zhangqiu District, Jinan City，Set up hub interchange（The planned Zhangqiu East Outer Ring Expressway is reserved to continue to extend southward in the long run.）Realize the interconnection with the planned Jinan to Gaoqing Expressway；The end point is in the north of Liangjia Town, Yucheng City.,Set up hub interchange and Beijing-Taiwan high-speed network，6 from Yucheng Interchange in the south.5 kilometers，North to Pingyuan South Interchange 12.Three kilometers，To the southwest, it is connected to the West Ring Section of the Second Ring Road.，The route is about 66 kilometers long.。The route of South Ring Section starts from Caofan Junction Interchange，Underpass Beijing-Shanghai Railway，Stop at Beijing-Taiwan Expressway。
The route is about 58 kilometers long.，The whole line adopts the standard of two-way six-lane expressway.，Design speed 120 km/Hour，Subgrade width 34.5 meters。Jinan Jinyue Highway Engineering Co., Ltd.（Jinan Jinyue for short）In the pavement paving construction undertaken，3 was adoptedDDigital construction technology means，Topcon 3D mmGPSPaving control system，It is also feasible to verify in this project up to now.、And is convenient for operation and application.DDigital paving construction technology。
An extraordinary road back to work
Late October 2022，Yucheng City, Dezhou, Shandong Province, experienced a severe outbreak of the disease.，Two weeks of global silence，Affected by the outbreak of the epidemic，The construction section of the project undertaken by Jinan Jinyue is located in Yucheng City.，As a result, it was forced to stop work.。Until November 5，Part of Yucheng City was released.，The project also has some construction conditions.。In order to recover the progress and duration of the project delayed by the epidemic,，Jinan Jinyue Project Department overcomes all kinds of difficulties、Actively organize resumption of work and production，All the mechanical operators were mobilized in the morning of the same day.，However, due to the impact of the epidemic, some auxiliary workers are still under control.，Only a few are on duty.。
Thanks to the outbreak of the epidemic.，Jinan Jinyue's technicians have mastered Topcon 3D mmGPSUse of Paving Control System，The members of the project construction team have also formed a good tacit cooperation.，And Topcon 3DWhen paving the system，Complete saving of piling、Hanging line and erecting guide flat beam（This application is double machine laying.）Process and relevant auxiliary construction personnel。There were only a few auxiliary workers at the construction site at noon that day.（Including the side controllers）In the case of，The smooth construction of the water-stabilized operation of double-machine parallel paving is realized.，Jinan Jinyue also became the first construction unit to resume work after the epidemic.。
The test and practical application effect brought by the outbreak of the epidemic show that，Topcon's leading 3DPaving technology，While improving the quality of the project，Reduce the number of personnel input on the construction site，It has effectively helped users alleviate the employment pressure brought about by the ongoing epidemic.。This is also digital.、One of the important connotations of the popularization and application of intelligent construction is to truly realize fewer people.，And gradually to a more advanced stage of unmanned.、Smart transition。
The Endeavor of Jin Yue Man
Topcon 3 used in this projectD mmGPSPaving system equipment，Used in other project departments of Jinan Jinyue in the early stage，At 3DThe paving system equipment is transferred to the project department of Jinan Ring Expressway.，This project has been constructed in the traditional way of hanging lines and erecting guide beams.。
The after-sales training personnel of Jiangsu Caracal Intelligence take advantage of the construction gap，The technical personnel of the project shall be subject to further indoor training and field video simulation training in advance, as well as preliminary preparations such as necessary control point encryption and design surface inspection and review.。At 3DAfter the paving system equipment arrives at the site，The on-site personnel of Caracal Intelligence and Jinan Jinyue are in the construction gap of the Paver again.，On-board 3 was completed on the same dayDInstallation and commissioning of paving system equipment。
3DUpon completion of installation and commissioning of system equipment，The time was close to 7 P. m.。In order to be the first to adopt Topcon 3DPaving control system，O as to effectively reduce the labor intensity of workers on the construction site.、And further ensure the quality and continuity of night construction.，On the same day, the person in charge of Jinan Jinyue Site decided to directly convert the traditional paving method to 3 during the night construction period.DSpreading，The specific work arrangement is to set up the station in advance by the technicians on the day shift.，Guarantee in case of night shift without technician on duty 3DContinuous power supply of the paving system equipment means no shutdown.。
With the joint efforts of the project site personnel，Topcon 3DThe paving system finally realized the continuous high-precision water-stable paving operation for 62 hours.，Topcon 3DPaving system equipment operated continuously for more than 66 hours，The overall working performance and construction quality are good。
At this point，Under the leadership of Jinan Jinyue Project Construction Team，Topcon 3DThe on-site technicians of the paving system and Caracal Intelligence have passed the test of this high-intensity continuous construction operation.，Also further verified Topcon 3DStability and Reliability of Paving Control System，Really played 3.DHigh precision brought by paving system equipment、High quality construction and ease of system operation。
Jinan Jin Yue site responsible person said.：Based on the past two years,，Our company is right for 3DAdequate Market Research of Digital Construction Technology、Continuous exploration and use experience，Fully understand Topcon 3DAccuracy and performance of paving control system equipment，We are confident in the construction results and quality.，It turns out to be true.。
Jinan Jinyue is a large state-owned enterprise under Jinan Urban Construction Group.，It is also one of the most influential road construction enterprises in Shandong Province.。Since its establishment in 2002，Jin Yue people always keep pace with the times.、Brave and innovative fighting spirit，Reputation by quality，Promoting development with benefits，Adhere to the development concept of scientific and technological innovation and develop continuously.。Jinyue people always focus on the forefront of the industry and the development of advanced construction technology.。
As early as August 2020，Jinan Jinyue is the first time in Shandong Province to put road 3.DDigital construction technology has been successfully applied in Jinan Dadonghuan expressway project，This also pioneered the use of 3 in expressway projects in Shandong Province.DApplication and exploration of digital construction technology。Through this project, Topcon 3DFurther Application of Digital Construction Paving Technology，Strengthened Jinan Jinyue Company's 3DThe deepening understanding and understanding of digital construction technology are further improved.，For the future 3 in the field of roads in Shandong ProvinceDThe application of digital construction has played a leading and exemplary role.。
The moon rises and sets、The twilight is closing，What remains unchanged is the enthusiasm of Jin Yue people to carry out construction in a tense and orderly manner on the site.；The lights are dim、The machine roared，It is a true portrayal of the progressive Jin Yue people who fought continuously at night on the front line of construction.；Haoyue is in the sky、There is a dawn，It must be a more brilliant tomorrow to welcome Jin Yue people.！
Maturity、Easy-to-use digital construction technology
Development process of digital construction
Following the world's first invention and introduction of non-contact balance beam in 1997,，In 1999, Topcon invented the first generation of roads with positioning signals provided by total stations.DDigital construction control system，It was officially introduced to the market in。In 2005, Topcon invented the second generation of Road 3.DDigital construction control system，That is to say, it is widely accepted and applied in China.mmGPSDigital construction technology，Already at the airport、Racing track、Square、Proving ground、High-grade highways and many other fields have been applied and recognized by users.，And with its precision.、Exceptional performance for ease of use and ease of operation，It has won unanimous praise from the vast number of construction user groups.。
Working principle of digital construction
Road 3DDigitize toBIMBased on modeling，Make use ofGNSSDifferential Positioning and Laser Height Control Technology，Digital mechanical control system installed on Road Machinery，Make it according toBIMAutomatic operation of construction model。
Road 3DThe digital system includes a computerBIMModeling software part、Instrument signal part and airborne control part，BIMModeling to provide construction data，The instrument part is responsible for providing datum information of plane and elevation.，After receiving the accurate positioning information, the airborne control part，Calculate the plane position and elevation of the machine on the road，Finally, the sensor is used to analyze and control the machinery according toBIMOperation based on construction design data。
The essence of modeling is the same as piling and hanging line.，It is an expression of road location information.。The former is opposite to hanging the number line.，The latter hung a steel wire.，The data used in the hanging line is universal.。
Advantages of Digital Construction：
1）No piling is required、Hang up the line、Erect the guide beam、Look at the computer，Save labor and process，It is helpful to advance the construction period。
2）The measurement is omitted、Setting out and stringing，Human errors and potential mistakes in the construction preparation stage are eliminated.。
3）Overcomes the sag of the steel wire.，And that longitudinal flatness is improve.，And that consistency of the cross slope is ensure.，Lay the most solid and critical foundation for flatness，Higher flatness can well control the amount of subsequent construction materials.。
4）Steel wire and intermediate guide beam are not used，And man-machine cross operation is reduce.，And that safety is improve。
5）The construction accuracy is the same day and night.，And that operation efficiency is improve.，And ensure that paving quality.。
6）Topcon 3DBoth that base station and the transmit of the paving system are one-to-many, I. e. 1.+NPattern，It can ensure that all equipment signals have the same source and accuracy.，But also can reduce that dependence on technical personnel and the labor intensity.，Greatly improve the ease of operation and uninterrupted use of equipment.。
7）TopconGNSSTechnical advantages of high frequency data update ratio，It is one of the core conditions to achieve high-precision construction control in dynamic construction scenarios such as mechanical walking.。Generally speaking，If the measurement data is updated less frequently，Not only will the machine travel speed be limited，At the same time, it will also restrict the effective promotion of the construction period.，This will greatly reduce the theoretical positioning accuracy of the instrument.。As a result, the equipment can be said and seen but not used.，That is to say, it has brought great losses to customers.，But also brings extremely negative influence to the road digitization construction.。
Strong after-sales service guarantee
Jiangsu Caracal Intelligent Engineering Co., Ltd. is the business development and after-sales technical service representative organization of Topcon Intelligent Construction Business in Shandong Province.，Play a very important exemplary and positive role in the sales and service process of this project。Make full use of regional coverage and its own technical advantages，Topcon users in Shandong and even East China，Provide a more comprehensive 3DDigital construction product consultation、Sales and technical support services。Through the full combination with the rich site construction experience of Jinyue Company,，To enable Topcon 3DDigital construction technology is closer to the actual application of the site.，And a better use effect is obtained.。
Contribution：Yang Haian, Jiangsu Caracal Intelligent Engineering Co., Ltd.
