Dongfeng Liuzhou Automobile R & D Test Site is located in the commercial vehicle base of Liuzhou Automobile City, Guangxi.，It is the first commercial vehicle in Guangxi.、R & D proving ground for passenger car testing。Dongfeng Liuzhou Automobile R & D Test Site Project covers a total area of 30.60 thousand square meters，The construction of the test yard includes a dynamic square with a diameter of 200 meters.，About 2 long.8kmStraight line performance road、Comprehensive durable road、NVHEvaluate the road、Noise Road、Multi-functional pavement such as ramp and braking evaluation road，Road flatness and overall quality standards are extremely high.。

Chongqing Zhixiang Paving Technology Engineering Co., Ltd.（It is called Zhixiang Paving Road for short）Construction。Zhixiang Paving Road is a professional road engineering technology company wholly owned by China Merchants Bureau.，The company has the second level of general contracting of national municipal public works construction.、Grade I professional contracting of highway pavement engineering construction、Grade III general contracting of highway engineering construction、Grade II professional contracting of building waterproofing works、Grade A qualification of municipal facilities maintenance and Grade A qualification of scientific and technological advisory bodies，Passed smoothly in April 2003ISO9001：2000 Quality Management System Certification；It is the leading scientific research and design of steel bridge deck pavement engineering in China.、Material processing、It is a high-tech enterprise featuring complete set of construction technology.。

September 18，With the loadTopcon 3D mmGPSControl SystemThe paver spreads out at a uniform speed.，The project of Liuqi Test Site opened the prelude of paving the water-stable base of the dynamic square.，It marks that the pavement construction of the project has taken an important step towards digitalization.。According to incomplete statistics，The project is also the second trial run of Jiangsu Donghai Bosch in China.、Qinhuangdao kart track、Hubei Xiangyang Dongfeng Proving Ground、The fifth high-level test after the Huawei Intelligent Test Yard in Suzhou/The racetrack uses Topcon 3.D mmGPSConstruction Application of Paving Control System in Paving Stage，It is another masterpiece of the application of the system in high-level projects in China.。

Statistical analysis according to the actual application effect，Based on Topcon 3DWater stable paving operation with intelligent paving technology，The overall accuracy is good，It fully meets the high quality construction requirements of the test yard.。Statistical Analysis and Conclusion of Water Stable Paving of Subbase：

Pass onLThe following conclusions can be drawn from the data analysis of the second layer of water-stabilized paving of the dynamic Plaza：

L2. For the second layer of the dynamic square, 647 points were collected at fixed intervals for comparison.，The quantity is sufficient，Uniformly distributed，Be representative；

The deviation between the design elevation value and the compaction value is between（-0.003~0.003m）There are 343，53%%；

The deviation between the design elevation value and the compaction value is between（-0.005~-0.003m）There are 196，30%%；

The deviation between the design elevation value and the compaction value is between（0.003~0.005m）There are 63，10%%；

The deviation between the design elevation value and the compaction value is between（-0.005~-0.01m）There are 24，4%%；

The deviation between the design elevation value and the compaction value is between（0.005~0.01m）There are 21，Proportion,3%；

The deviation between the design elevation value and the compaction value does not exceed 10mmYes。

Conclusion：

The deviation between the design elevation value and the compaction value is between（-0.005~0.005m）There are 602，The proportion is 93%；The overall paving quality is very good，Fully meet the construction requirements。

Before paving，Liuzhou Automobile Project Department has held several special meetings on pavement construction，Combine 3D mmGPSMillimeter-level high-precision paving control technology，Carry out superstructure construction of pavement of the Project（Cement stabilized macadam layer and asphalt pavement），Digital paving model is established according to road design parameters.，And passed 3D mmGPSPaving control technology，Achieve digitization、Pileless、High-precision construction control。

The superstructure of the pavement is of construction quality“Face”Engineering，It is also the key to determine whether the test yard meets the design standards.。With the development of technology，The traditional paving technology is still used in domestic paving operations.，Thickness control needs to be achieved by erecting the wire line.，Elevation deviation is easy to occur during construction.。Topcon 3 adopted by Liuzhou Automobile Project DepartmentDIntelligent paving technology can monitor the paving position in real time and control and correct the paving elevation of the screed.，Ensure that the paving equipment carries out the paving operation according to the road design surface with high precision in the whole process.，Realize high efficiency and intelligence of pavement。

Liuzhou Automobile Project Department focuses on the company's requirements for safety production management of construction projects.，Take quality engineering as the starting point，Take the pilot section as a demonstration，Detailed implementation of safety risk prevention and control and fine construction requirements，Ensuring the Safety, Quality and Efficiency of Pavement Engineering，Lay a solid foundation for the final sprint of the project。

At this stage，The construction of the test site has entered the final stage.，After the completion of the test site，It will certainly inject new momentum into the development of Dongfeng Liuqi's R & D business.，It will play a greater role in the development of Dongfeng Liuzhou Automobile Industry and the high-quality development of Liuzhou Automobile Industry.。