Capturing reality in one of the world’s busiest airports

Author: Kevin Cordeiro

Changi Airport in Singapore is famed for its calm atmosphere and the smooth running of all operations at the airport. Its long-standing reputation as the world’s leading airport can be largely attributed to the management’s progressive and innovative approach to the running of the airport. Changi Airport Group (CAG) was keen to look into how the latest laser scanning technology could be used to maintain its facilities to the highest standards in the long term.

Taking a long-term view

为了进一步增强诸如设施管理等方面的持续，樟宜机场集团需要一个准确，精确的3D模型，以捕获建筑，结构和MEP终端的各个方面。

着眼于未来,樟宜机场集团再保险cognised this opportunity to deliver long term value with an as-built BIM (a virtual replica), which would be a valuable tool even after renovation and expansion work was completed. JTRS Registered Surveyor (JTRS) were commissioned to scan and create the BIM of T2. JTRS Registered Surveyor is a professional land surveying company, known for their progressive approach to surveying and use of the latest equipment to deliver the highest standards of accuracy. They are leading specialists in 3D laser scanning and photogrammetry – the key practices required to construct the BIM. In this project, JTRS worked in conjunction with BIM solution service provider, Geodelta System Sdn Bhd.

在调试BIM时，樟宜机场集团成为新加坡最早采用新的BIM技术进行未来重建项目的公司之一。该扫描将是新加坡生产的最大的扫描到BIM项目之一，需要超过60万平方米的地板区域，包括在建筑天花板上方的MEP方面，以扫描以极端数据清晰度和尖锐的分辨率来扫描造型。

同步和平稳操作

由于多个政党参与了未来的翻新和扩展工作，因此BIM构建了所有图纸，计划，高程，部分和观点。由于这些图纸是从模型中提取的，因此将更改合并到模型中并自动更新。这种方法使项目成员能够使用一个连贯的计算机模型系统进行协作设计和构建，并最大程度地减少对现场访问的需求进行进一步的手动检查。

The first stage of the project involved establishing a new set of control network where JTRS set a total of 144 control points for the entire scan. The geo-reference would provide a homogenous set of information for future projects. This enables confident, precise registration and geo-location of multiple scans, which could be passed to contractors so everyone could work on the same base. For the control surveying, JTRS used theLeica Nova TM50, six prisms and aLeica DNA03digital level.

Jimmy Tan, Director and Registered Surveyor at JTRS commented,“The Leica Nova TM50 enabled us to measure four sets of angles at each setup very quickly, with the high-angle accuracy needed to measure the horizontal and vertical angles. By measuring so many set of angles at each setup with confidence, the TM50 dramatically expedited the completion of the control survey network mapping across all three Changi Airport terminals.”

大规模的精度

为了解决创建BIM模型的精确和规模的双重挑战，JTR使用Leica GeoSystems集成扫描解决方案，包括一个Leica ScanStation P40单位和两个Leica BLK360imaging laser scanners together with Leica Geosystems’ software solutions.

The ScanStation P40 was selected based on its ability to reach a very high density and produce high resolution and accuracy - up to 1mm spacing of data - over the huge space combined with excellent performance and reliability. The ScanStation P40 was used for the control scan of the entire building and large areas like the departure hall and staircases, while the BLK360 addressed the small and more confined areas.

“Leica Geosystems’ integrated scanning solution produces rich data and the modelling is not only more accurate than competing solutions, but it is also able to capture and scan even the smallest of details. Whilst other products are able to offer precision in small areas, they may not be able to deliver the same quality of data over such a large area, which was so important on this project,” Jimmy Tan commented.

Seamless integration

Leica Cyclone寄存器用于注册，管理和处理点云数据。作为在新加坡生产的最大的扫描到BIM项目之一，扫描量达到了1 TB的数据。扫描的总面积为Changi机场2号航站楼生产BIM型号覆盖了两层 - 地面以及机械电气和管道（MEP）信息的天花板区域。总体而言，设置了23,000多次扫描，以创建BIM模型，以用于MEP的体系结构和结构和LOD200的LOD300。使用Leica GeoSystems集成扫描解决方案，JTRS能够在保持稳定性的同时处理这一卷。

Cyclone REGISTER’s visual alignment not only mitigated the need to place targets on walls to align but also allowed JTRS to manage tens of thousands of scans in a single registration. The ease with which these scans could be positioned based on common geometry further accelerated the modelling process. Thanks to the high-contrast visualised point cloud, the vast number of scans could easily be overlaid to create the mesh from which the BIM is constructed.

Having completed the 3D laser scanning and merging of the scans, the point clouds could then be exported into Leica JetStream. Changi Airport Group and system owners could then view the point clouds, make a walkthrough path and take further measurements from the digital model.

Jimmy Tan noted, “The software integration was absolutely seamless. Once we had exported the data in the correct format, it could then interface with multiple other software platforms such as Revit. The output could then be tailored according to the needs of the client (CAG).

通常的公关ocessing the data integration of such a huge scan would be very time-consuming but using the Leica CloudWorx plugin the team were able to integrate all the point clouds into Revit saving up to 40% of time in building the BIM model.”

Delivering enduring value

“在如此庞大的项目中，效率至关重要，我们无力浪费时间培训团队或应对技术挑战。尽管硬件和软件的易用性以及所需的最小培训，但Leica Geosystems团队从头到尾都提供了全力支持。

从测量师的角度来看，Leica Geosystems解决方案的成本值给我们留下了深刻的印象。我们使用DNA03数字水平之类的设备已有10多年的历史了，它仍然处于完美状态。但是，最大的价值是我们在此处为客户（CAG）生成的输出，因为数字模型现在可以使用数年 - 甚至几十年了，”吉米·谭（Jimmy Tan）结束了。

Changi Airport’s reputation as the world’s leading airport can also be credited to its focus not just on functionality, but also on aesthetics. The use of the 3D laser scanners enabled JTRS to capture even detailed image data incorporating the onboard colour and texture mapping without disrupting the constant flow of passengers in one of the world’s busiest airport.

The BIM model augmented missing design data and created a data-rich connected workflow, enabling CAG and future contractors to explore and experiment with plans and designs for the airport even without entering the facility – helping Changi Airport to retain its reputation as the world’s best airport.