Background and application overview
Shenzhen is the pioneer of China's reform and opening up.，It has developed from an unknown fishing village to an international metropolis.，It is inseparable from scientific urban planning and complete infrastructure.。Municipal roads are the main economic arteries carrying urban development.，It is also a very important link for the coordinated development of urban areas.。Construction of municipal roads、The quality of operation and maintenance management can largely reflect the height and level of urban economic development.，It is also a barometer of the health of urban economic development.。
Shenzhen Zhongsen Architecture was founded in 2008.，The office is located in Nanshan District, Shenzhen.，The company's management and technical team has been working in the field of municipal road construction for more than ten years.，It is accompanied by high quality in Shenzhen.、A professional construction enterprise with high quality and rapid development。Over the years，The company's core management team continues to focus on the field of municipal asphalt pavement construction，Combine asphalt mixture production、Asphalt pavement construction and technical consultation as a whole，Accumulated rich experience in construction management and engineering survey。
The company now has a professional、Stable technical and management team，Complete set of large asphalt Concrete Mixing Plant for pavement construction、Paver、Milling Machine、A number of Road Rollers and other construction machinery and equipment，And passed successivelyISO9001-2008、ISO14001-2004、GB/T50430 three-standard integrated authentication，Have high quality、Complete all kinds of highways with high efficiency、Capacity and level of municipal roads and other projects。
Sincerity、Innovation、Pragmatic、Refinement is the enterprise spirit of Shenzhen Zhongsen Construction，The main roads in Shenzhen undertaken by the company are the second phase of Nanping Expressway.、East extension of Danping Expressway、Shenhua Expressway、Gongchang Road and other municipal works，The qualified rate is 100%，And the excellent rate is increasing year by year.，There has never been any quality or safety accident.。It has made positive contributions to the construction of transportation infrastructure and the rapid economic development of Shenzhen.。Sincerity、Pragmatism is the foundation for the survival of enterprises，Thanks to this, the company has established a good corporate image in the fierce market competition for many years.；Innovation、Refinement is the Power Source of Enterprise Development，This is exactly the company's high quality for many years.、Efficient completion of the municipal road construction projects undertaken by the solid proof.。
Uphold innovation、Enterprise spirit of seeking refinement，The company has innovated and introduced the world's leadingTopcon 3DIntelligent paving technology，It has taken the lead in small-scale practice and application in the rapid reconstruction of Guimiao Road and the paving of asphalt pavement in Huangmugang Transportation Hub.，Practice results show that，Adopt 3DIntelligent paving technology has achieved remarkable results in improving the smoothness of asphalt pavement.。
Following the small test of Guimiao Road and Huangmugang Transportation Hub Project，The company will 3DThe intelligent paving technology has been formally applied to the paving operation of the asphalt underlayer of the whole line of the new project of Dongchang Road.，During the whole construction process, the limit deviation shall be controlled within3mmInside，90%The above is completely consistent with the data model.，After rolling and forming, there is basically no bumpy feeling when driving on the lower layer of asphalt pavement.，The flatness can be comparable to the upper layer of ordinary technology.，Sensory smoothness and symmetry，A feast for the eyes，After testing, all the indicators are qualified.，The smoothness and driving comfort are significantly improved.。
3DApplication of Intelligent Paving Technology in Dongchang Road Project，It marks the first large-scale and successful application of Topcon 3 in Shenzhen municipal road field.DIntelligent paving technology，It is an innovative move of Shenzhen Zhongsen Architecture.，Highlighting the company's innovation、Enterprise spirit of seeking refinement，It is in the forefront of Shenzhen and even the whole country in the field of municipal construction in terms of technological leadership and technological innovation.。
3DThe first and large-scale successful application of intelligent paving technology on municipal roads in Shenzhen
Dongchang Road is Guangming District, Shenzhen.“Liangming Interchange”One of the important municipal roads，Located in the middle of Guangming New Area，South to Shiyan Street, Baoan District，North to Donghuan Avenue, Guangming New District，It is the main traffic artery connecting Guangming New District and Baoan District.，CityⅠClass I main road，Six lanes in both directions，The total length of road is 3.762 kilometers，60 meters wide。Topcon 3DSuccessful application of intelligent paving technology in this project，Lick bricks and tiles to help Shenzhen's high-quality development，It provides a solid foundation for the rising expectations of Shenzhen citizens for driving comfort.。
Schematic Diagram of Construction Section of Dongchang Road
Pain Points of Traditional Municipal Road Construction
Compared with the construction of high-grade highways and national and provincial highways far away from urban areas,，There are many difficulties and constraints in the construction of municipal roads.。Road construction is a typical labor-intensive industry，Sufficient mechanical equipment and operators are usually required.、Technicians and auxiliary workers, etc.，A large number of mechanical equipment and personnel on the construction site work in coordination with each other.，In addition, municipal construction sites are usually located in urban areas with dense traffic and people.，It poses a great challenge to the safe production operation.。
In order to restore traffic as soon as possible, municipal engineering usually requires a tight construction period.，For the traditional way.，It is also a contradiction between the requirement of tight construction period and construction quality control.。At the same time，The mixing station is usually located in the suburbs far away from the urban area.，Long transportation distance of paving materials，Large Vehicle/ 'target='_blank' style='color:blue;'>Transport Vehicles are also facing the pressure of traffic control.，Precise control and allocation of material consumption in advance is a prominent problem.。
How to manage safety、Progress of construction period、Seek a balance between construction quality and traffic control requirements，The pressure on site construction managers is enormous.，It is also a great challenge for practitioners in the field of municipal construction.。To be specific，Traditional municipal construction mainly has the following typical pain points.：
Traffic control：There are restrictions on the travel time of large Vehicle/ 'target='_blank' style='color:blue;'>Transport Vehicles in urban areas.，Exceed the specified time period，Certain areas are off-limits.，It is necessary to plan the driving route and material entry time in advance.；
High safety requirements：Municipal roads are located within the city，Usually, continuous flow construction is adopted.，More pedestrians and vehicles，The road construction site usually needs more mechanical equipment and construction personnel.，High requirements for safety management of construction；
Overlapping of new and old pavement：New roads in cities often run through several existing roads.，In this case, the existing road shall be taken as the reference for overlapping treatment.，O as to achieve the effect of smooth connection.；
The construction time is tight、High quality requirements：In order not to affect the daily traffic and life of residents, the municipal construction authorities，Shorter construction times are often required.，But the road project is huge.，And that quality and technical requirement are very high.。The requirement of shortening the construction period usually affects the construction quality of the project to a certain extent.，At the same time, most of the municipal road construction is night construction.，It puts forward higher requirements for the quality control level of construction links.，It is urgent to solve the contradiction between the tight construction period and the high quality requirements, which are mostly night construction.；
Material preparation：Asphalt Mixing Plants for municipal construction are usually located in the suburbs far away from urban areas.，The skip has a long transportation distance and faces the pressure of traffic control.。And generally, different layered structures of road construction are subcontracted by different construction bodies.，There may be a large deviation between the roadbed acceptance and the construction design.，The construction period and connection arrangement will also have potential problems of pavement settlement.，How to control the paving accuracy and accurately quantify the required materials also poses a higher challenge to the smooth implementation of the construction.。
Combine the above pain points，It is difficult to cope with the traditional construction technology.，Usually, more manpower is needed.、Material resources as corresponding support，At the same time, a lot of measurement work has been done.，It also requires the management and organization personnel responsible for the construction site to have very rich construction and practical experience to cope with it.，For the number of personnel、High dependence on technology and management level。
3 is adoptedDTopcon 3 based on digital construction technologyDIntelligent paving technology，Based onHigh precisionMeasurement and paving control system equipment，Supplemented by3DDigitizeModelling、SmoothingDesign andQuantify the materialComputing and other advanced technical means，It can realize the dynamic quality management and control in the whole process of construction.，And that construction quality control is not influence and restricted by the illumination condition.。And the height difference of the lower bearing layer and 3.DRecheck and test the digital construction model，Realize pre-construction quality control and material consumption calculation，The actual paving construction process only needs to ensure the normal operation of the system equipment.，Greatly reduce the dependence of construction quality control and management on the technical level of personnel，Based on advanced scientific and technological means，Ensure high standards and standardized implementation of the project construction process。
Topcon 3D mmGPS Paving system
Topcon 3DIntelligent paving technology，Can well solve that problem of overlap of new and old road surfaces（Smoothing）、Contradictions and problems related to urgent construction period, high quality requirements and quantitative estimation of materials。
Topcon 3DBrief Introduction of Intelligent Paving System
Topcon 3DIntelligent Paving System is based on Road 3DDigitize, that isBIMModeling techniques，Fusion satellite positioning、Domain laser height control、Automatic control、Wireless communication and other advanced technical means，The whole process of paving operation can be informationized.、Digitize、Intelligent and visual，The construction control process is not affected by light conditions.，It provides great convenience for municipal night construction.。Based on the whole process dynamic quality management and control means provided by the system，The whole construction process greatly reduces the dependence on personnel operation and site management level.，Directly realize high precision、Effect of High Quality Automatic Paving Construction。
Prior survey and staking out are not required for paving site operation.、There is no need to hang the line and erect the guide beam.，Significantly reduce the number of auxiliary labor inputs，Avoid the safety risk brought by man-machine cross operation to the greatest extent.。During the construction, the lifting of the screed of the Paver is mainly controlled by automation.，Realize intelligent control of paving operation，Minimize manual intervention in the paving process，Ffectively avoid that influence of human factors on the smoothness of the road,、Impact of key data such as elevation control，The construction accuracy can be improved to millimeter level.。
This project will officially be Topcon 3.DApplication of Intelligent Paving Technology in Municipal Engineering Construction，According to the characteristics of municipal engineering，At the same time, some optimization and adjustment of applicability have been made.，To meet the special requirements and characteristics of municipal engineering construction。
Topcon 3DIntelligent paving control system
Main technical features and advantages
The core technology of the industry-leading and domestically applicable high-precision automatic paving system；
And that construction proces is simplified，And that operation efficiency is improve，Reduce labor costs，Avoid security risks；
RealizationBIMSeamless connection and application from design to construction，Reduce manual intervention and adjustment；
Realize the digitalization of paving operation、Intelligent and automatic control，Night construction will not be affected.；
1+NAdvanced Technology Route，Good system sharing and ease of use，More convenient for popularization and application；
Realize digital management，Dynamic quality management and whole process construction control；
Achieve a high standard of flatness、Smoothness and thickness control，Effectively reduce the loss of materials。
Topcon 3D mmGPSWorking principle of intelligent paving system
3DImplementation of intelligent paving project
The project will be formally implemented in the middle and last ten days of November 2022.，During the implementation of the project, the epidemic prevention and control policy in Shenzhen is very strict.，All construction personnel are required to provide nucleic acid negative certificates for 24 hours every day.，It also puts forward very high requirements and challenges for the employment management of the project implementation link.。Shenzhen Zhongsen Construction is under great pressure of work.，It has overcome many difficulties and successfully realized the asphalt paving operation of Dongchang Road as agreed.，And that whole construction proces is smoothly connected.，The paving quality and control level have been highly concerned and recognized by the higher authorities and brother units.。
Due to the particularity of the project，Dongchang Road has gone through a long period from land acquisition for construction project to formal construction and asphalt layer construction for the implementation of this project.。When the unit in charge of the construction in the early stage hands over the roadbed with Shenzhen Zhongsen Building，It is a long time since its completion.，On-site receiving and inspection link，After measurement and detection, it is found that some sections and surrounding roads have produced different degrees of settlement.。According to the measurement, detection and preliminaryBIMComparison between modeling results and original design，If asphalt paving is carried out according to the original design，Will directly bring huge economic losses to Nakamori.，And the smoothness of the paved road is difficult to be guaranteed.。
After consultation with the Owner and the Supervisor，The asphalt paving stage can ensure the thickness of the structure.、On the basis of flatness and transverse drainage，Reconstruct and adjust the asphalt paving design。Thanks to Topcon 3DMillimeter laser for intelligent paving systemRTKAnd matchingBIMConstruction design modeling software，The technician recreates the asphalt paved road based on the measured and detected dataBIMConstruction model，It shall be carried out in advance before the paving construction.BIMSuitability check of construction model。The actual test results show that，ReconstructedBIMThe construction model fully meets the requirements and expectations of the Owner and the Supervisor.，It effectively avoids and solves the problems of huge economic losses and difficult control of flatness caused by pavement settlement.。
The specific implementation key steps of this project are listed as follows:：
1、Original pavement data acquisition
In view of the specific characteristics of the project，It is necessary to collect the original pavement data before the formal implementation of paving operation.，This is also the key link of construction quality control.。Before that, it is necessary to lay and encrypt the control network.，Provide a basic measurement control framework for data acquisition。
In the specific implementation, the engineer first uses the supporting systemmmGPSLaserRTKThe measurement system collects the existing pavement according to the section，Elevation Measurement Results Based on System Millimeter Accuracy，Accurate acquisition of original road surface data。On this basis, the collected original pavement data is compared with the original design data.，On the basis of ensuring the key indicators such as thickness and smoothness，Adjust to fit the original design to the greatest extent，To ensure the structural strength of the paved road、Smoothness, lateral drainage, etc.。
Original pavement data acquisition
2、Design optimization and adjustment
Topcon 3DThe digital modeling software is based on the data collected from the original road surface and the key technical indicators.BIMAfter construction design，Also need to go to the scene to adjust theBIMCheck the applicability of the construction design，On the basis of the inspection, the optimization and adjustment are carried out again.，To make sureBIMThe construction design can fully realize the thickness、Precise control of key technical indicators such as flatness and cross slope，And finally high precision、High-quality implementation of automatic paving control in construction links。As you can see from the two charts below，The overall flatness of the original ground is poor.，Optimized Adjusted 3DIntelligent paving design is based on thickness control，It is very significant in improving the index of flatness.，And this data is only for the design optimization of the bottom asphalt paving.。After completion of asphalt paving of the bottom layer，Completion inspectionIRIThe average value is 0 of the high standard..85~0.86，See the figure below for specific data.（Asphalt completionIRITest results）As shown。I believe it is being completed、After the upper layer of asphalt is paved，The paving quality and flatness index of the whole completed pavement can reach a very high level.。
3DIntelligent pavingBIMDesign modeling and optimization adjustment result
Flatness optimization results：Original ground and 3DComparison of intelligent paving deviation
Completion of bottom asphalt of Dongchang RoadIRITest results
3、Calculation of material volume
Adjusted with the final optimizationBIMConstruction design，Combined with Topcon 3D-OfficeDigital construction modeling software，Directly through the contours and 3DSection view for inspection，To further review the compliance of the design with the existing floor，At that same time,BIMComparison between construction design and original pavement data，Directly generate the material volume required for asphalt paving construction，So as to provide a quantitative scientific basis for the precise control of material consumption.。
Calculation and analysis of asphalt consumption
4、Site 3DPaving construction
Carry out basic inspection on the mechanical property of the Paver before paving，Mainly involvedPZS-MCField laser receiver is firmly fixed、Correct dimensional parameters accurately、Hydraulic cylinder sensitivity adjustment and other key points。And then useUThe disk will be created.BIMThe construction model is imported into 3DIn the airborne system of intelligent paving，Calibrate the height at the starting position，Set the cylinder gauge，Can be carried out normally 3DIntelligent paving construction operation。During paving construction，The interval is adoptedmmGPSLaserRTKThe mobile station shall check the paving surface at any time.BIMElevation of any point in the construction data model。The actual test results show that，Limit deviation shall be controlled at 3 during the whole paving process.mmInside，And 90%Above andBIMThe construction data are in perfect agreement with the model。
mmGPSLaserRTKReal-time detection of construction quality by mobile station
3DDynamic Control and Display of Intelligent Paving Airborne System
3DIntelligent asphalt paving site
Summing up
During the specific implementation of this project,，The owner unit represented by the Director of Highway Administration of Guangming District led the team to the site for observation and inspection.，The chairman of Shenzhen Zhongsen Construction Company personally accompanied and discussed the implementation of paving and Topcon 3.DIntelligent paving technology is introduced and reported in detail.，It has been highly appraised and appreciated by the owner's leaders.。Then arrange more personnel of the Highway Department to communicate and discuss on the spot.，The leader of the Highway Department said at the scene.：“Such good results are achieved at the bottom asphalt paving stage.，It's really something！”
On-site inspection by leaders of Guangming District Highway Administration
In the later stages of project implementation，CCCC First Highway Engineering Co. Ltd、Fine Construction Engineering Consulting、Luban supervision and many other construction、Supervision units have also visited the project site one after another.、Exchange and explore new technologies，The response has been very enthusiastic。
Owner、On-site observation and exchange of construction and supervision units
Over the past 40 years of reform and opening up，China's cities continue to grow and develop，The municipal engineering market showed a rapid growth trend.，Overall strength and competitiveness of the industry、Its influence has also been significantly enhanced.。Standing Committee of the CPPCC National Committee、Lai Ming, deputy secretary general, said at the first municipal engineering construction industry exposition just concluded.：“Urban construction as a systematic project，It takes a long time to work.，Overall planning should be made、Construction、Three links of management，Improve the systematicness of urban work，Improve the order of urban development and the livability of urban construction，Conform to the law of urban development，Guided by the new development concept，Promoting Urban Construction with High Quality。” It is believed that Shenzhen Zhongsen Construction is based on“Quality first、Reputation comes first、Service first”The core values of the enterprise are the mission.，On the basis of ideas and scientific and technological innovation，It will certainly contribute more to the further promotion of high-quality urban construction.、More power.。
