Fighting Time and Tide to Capture a 5-hectare Coastal Construction Site in 3D

作者：Hazlinda Mohd Nuron

In 2018 the construction of Hyosung Vina Chemicals Port began in the Ba Ria-VungTau province, southern Vietnam. A collaboration between the Vietnamese Government and South Korean industrial conglomerate Hyosung Corporation, the new port is a part of the Hyosung Chemical Complex. Once completed, the Hyosung Chemical Complex will include a propane dehydrogenation (PDH) production plant, a polypropylene (PP) plant, a liquefied petroleum gas (LPG) storage tank and an LPG and petrochemical product warehouse in the Cai Mep Industrial Zone in Ba Ria-Vung Tau, located near Ho Chi Minh City.

One of the final tasks in the development was the construction of the port’s LPG jetty. With over 30 years’ experience in marine, waterway and transport infrastructure,Portcoast是越南领先的港口和沿海调查顾问。该公司致力于为地形调查，液化石油气码头和设施制造的型号制作3D映射，并为保护码头的护理报告进行检查报告。

地形调查覆盖了超过5公顷的区域 - Portcoast的专业知识和经验水平在水中，对于在这些难以到达的地区收集数据至关重要。为了加剧无法获得的挑战，尽管该综合大楼的某些地区仍在建设中，但其他地区已经在运作。

Dr. Hoang Hiep, the Portcoast team leader on the project commented,“The main challenge for scanning the whole port was the selection of scanning positions in a complex where there was significant traffic and where disturbances from the ongoing construction work could compromise the stability required for precision scanning.”

为了减轻在这种破坏性，交通繁忙的环境中工作的挑战，Portcoast决定从内部道路上方的高架位置进行扫描。

Dr. Hoang Hiep of Portcoast explained,“从高处上方工作需要一个扫描仪，该扫描仪可以在长时间可测量的范围内提供高度的精度。Leica ScanStation P50的精度最高为3mm，因此我们可以自信和精确地覆盖整个范围。”

Whilst theScanStation P50was used to capture the data on top of the bridge, under the bridge the team used specially modified equipment, such as customised cranes to install theLeica RTC360andLeica BLK360to measure and capture highly-detailed data in the complex, narrow and inaccessible areas, such as the liquid tanks, the pipeline systems, access bridge and the marine loading arm.

时间就是金钱

承诺提供显著的经济效益or the region, the construction project alone is estimated to have created jobs for about 2,000 workers during its construction. Once completed, the port is estimated to contribute 80 million USD annually to the state budget so it was imperative to ensure that the port can be fully operational as quickly as possible. Speed was, therefore, a key factor in the selection of equipment for Portcoast and in training the team in the use of this equipment.

“Not only was the training time for the team almost halved by working with the Leica Geosystems team, but the high speed of capturing data with Leica’s equipment significantly reduced the survey time. In a project like this, the topographic survey of revetment would usually take around 12 hours with a survey grid of 20m per setup. Whereas it can be reduced to 3 hours when using the ScanStation P50. Accelerating the process also reduced our operational risk and the number of employees required for this work,”explained Dr. Hoang Hiep.

加强网站和数据分析办公室之间的协作

To scan the port, Portcoast needed to combine thousands of points and to combine the data from different devices, such as total stations, GNSS and laser scanners – something that would usually prove to be a very complex and time-consuming process. The seamless integration of Leica Geosystems’ equipment and software solutions meant the data could easily be passed between the off-site team processing the data and the field team.

Having worked in similar projects across Southeast Asia, Pakistan and U.A.E, Portcoast were particularly conscious of the importance of fast data transfer in tropical countries. The rapidly changing weather conditions demand fast data transfer between field and office teams to verify data and prevent any loss of data. After collecting the point cloud data from the geodetic equipment, Portcoast used theLeica Cyclone,Leica Cyclone 3drandLeica Infinity非现场处理数据。

“The high-speed and high-level accuracy of capturing field data helped to avoid delays in office post-processing as the software helped us to check the points every time we needed to. With Infinity and ConX it is easy to transfer data between the field and the office within 1 min,”added Dr. Hoang Hiep.

“The outcome map produced by Cyclone is a very accurate model, which we can use to create a 3D model and VR system. Using Cyclone 3DR we can then further refine the model to provide high levels of accuracy and visibility.”

By collecting point cloud data at different times and usingLeica Cloudworx for Revit为了将其转换为井井有条的图纸，可以以最高的精度估算用于沉降或位移的边距（毫米）。

截至建造的图纸和BIM将支持港口的设施管理方面，为检查报告提供参考，并使Hyosung使用数字模型计划和模拟港口的未来发展和翻新。

仅仅几周才能完成的七名工程师团队的工作将大大减少将来维护所需的现场访问，并可用于增强和保护未来几十年的港口运营。

“当我们接受这个项目时，只有一半的团队在这种地球设备上都有任何经验。整个Leica Geosystems产品生态系统的集成效率提高了，节省了相当大的时间，现在整个团队都渴望定期使用Leica Geosystems Geodetic设备” concluded Dr. Hoang Hiep.