May 14，Zhu Mengyan, Chief Engineer of the Third Company of the First Bureau of China Railway, and His Delegation Visited the Eastern Bypass Expressway of Xuzhou Highway Engineering Corporation（Xuming Expressway）XM-LMInvestigation and Exchange of Bid 3 Project。XM-LMLi Mingsheng, the project manager of Bid 3, accompanied the exchange activities.。

Zhu Mengyan and his party went deep into the construction site.，On-the-spot observation of water stability 3DPaving work，The technical director of the project department introduced 3 in detail.DPrinciple of paving technology、Advantages and application in the project，The two sides discussed the construction process.、Quality control、Detailed communication on safety management and intelligent operation。Mission to item 3DThe application of paving technology is highly appreciated.，They said，3DPaving technology not only improves the consistency of pavement flatness and thickness,，It also greatly reduces manpower and cost input.，And that construction efficiency is improve.，The construction period is shortened.。Members of the delegation also shared their experiences and practices in project management.。

Topcon 3D mmGPSPaving control system

Topcon 3D mmGPSPaving system is based on roadBIMModeling techniques，Combination of satellite positioning and laser height control technology，Achieve automation、Simplify、Mechanical automatic construction control system for high precision construction。Real-time differential positioning by satellite and laser height control technology，No need to measure and set out in advance、Smash pile, hang line and erect guide beam，Substantially reduce the input of labor force，Reduce the potential safety hazard of man-machine cross operation，At that same time, the influence of human factor on the smoothness of the road is avoided,、Impact of key data such as elevation，Improve the construction accuracy to millimeter level。

Topcon 3D mmGPSCharacteristics of paving control system

Pile-free operation

There is no need for surveying personnel to carry out field survey, pile setting and erection of reference datum line.，Reduce working procedures such as hanging wires and erecting beams on site，Reduce the input of auxiliary personnel，Make field management more efficient，Improve security。

All-weather construction

The system control box screen displays the current construction status，Easy to understand，And is convenient for an operator to view，Construction conditions are not affected by light.，Continuous construction operation for 24 hours。

High precision control

Millimeter-level elevation control accuracy，Provide high-precision elevation datum for the whole construction process，Avoid waste of quality materials。

Signal sharing

Different from 3 of the whole station ceremonyDPaving system——The original one-to-one mode of operation，Topcon 3D mmGPSThe real-time data sharing mechanism is adopted for the control benchmark of the paving system.，Single Field Laser Transmitter andGNSSThe base station can provide multiple devices with high-precision 3DLocating signal，That is, 1 is supported+NThe working mode of，Significantly improve the efficiency of field benchmark data utilization and ease of operation，And minimize the number of stations and human errors between different benchmarks.，At the same time, the investment of professional equipment and professionals will be significantly reduced.。

Plug and play，The applicability is wide

Topcon 3D mmGPSPlug and Play Design of Paving Control System，No need to change the hydraulic system of the machine，It can be directly compatible with all pavers of domestic and imported mainstream brands on the market.，And any paver manufacturer does not need to open an authorization code separately.。

Process control

Topcon's millimeter-class mobile station can easily realize the whole process control of the whole paving operation.。The digital model of the road design can be checked in advance，Real-time inspection during paving and re-inspection and acceptance after paving，So that that quality control of the whole construction proces is realized，Real-time control of paving quality。

At the subsequent symposium,，The project department welcomed and thanked the delegation for their visit and exchange.。Project manager Li Mingsheng said.，This is a promotion of communication.、Share experiences、Important activities for common progress，YesXM-LMThe third bid project is also a valuable opportunity for communication and learning.，The next step will be to maintain communication.，Learn from each other、Inspire each other，Jointly explore new directions and ideas for the development of the industry。The project department will continue to strengthen“Four new”Technology application，Further improve the intelligent level of the project，Constantly sum up experience、Optimize the process、Weed out the old and bring forth the new，Improve management ability and technical level，Promote the high quality of projects、High efficiency、Advance at a high level。

Project support

This project is supported by Jiangsu Caracal.。Jiangsu Caracal Intelligent Engineering Co., Ltd. is a road engineering digital construction company based on Topcon digital technology.，Its business scope includes sales of Topcon digital products and road water stability.、Labor construction subcontracting of asphalt and other projects。Dedicated to the application of advanced science and technology，Improve project quality and save construction cost。

The construction method provided by the Caracal team is based on roads.BIMModeling techniques，Combination of satellite positioning and laser height control technology，Achieve automation、Simplify、High precision construction。

Caracal Intelligence has participated in dozens of major engineering projects over the past few years.，Among them, the representative projects are：North Extension of Qianjiang Passage in Haining，Jinan Dadonghuan Expressway Project、Huawei Smart Proving Ground Project、Beijing-Shanghai Expressway Reconstruction and Expansion Project、G15 Shenhai Expressway Renovation Project、Hangzhou Airport Road Renovation Project、Cangzhou 104 National Highway Reconstruction and Expansion Project。

Note：Part of this article is extracted from Xuzhou Jiaotong Construction Wechat Public Number.