Leaving a legacy in Vietnam with surveying & laser scanning technology

作者：Hazlinda Mohd Nuron

我的港口是一个通用货物港口，位于越南南部的BA Ria-vung Tau。自1993年以来运营，该港口旨在全年24小时为客户提供快速，有效和可靠的港口服务。当业主在获取港口的完整数据文档方面面临挑战时，Portcoast建议应用他们先前使用的技术：激光扫描以收集数据以开发端口的3D BIM模型。该港口的所有者委托了132米的主泊位和72米长的通道桥的检查报告，以及整个Phu My Port的3D激光扫描，包括院子，仓库和设施。通过扫描港口及其设施，目标是为业主提供整个站点的数字双胞胎进行持续检查和维护。

该项目的投资者渴望确保一支经验丰富的团队以最高水平进行激光扫描，他们可以明确验证数字双胞胎是正确的。

Portcoast是该地区最有经验的海洋，水路和运输基础设施的测量师之一。他们以准确性的声誉，在该地区执行类似项目时具有可靠的记录，例如附近的3D扫描Hyosung Vina Chemicals端口, Posco SSVN Port and their work for记和港口SITV。在该项目中，Portcoast的测量师负责检查和扫描整个端口，并为最终3D模型提供质量保证。

Requiring both accuracy at speed and range as well as the ability to access narrow, challenging areas, the team opted for a combined reality capture solution, including theLeica扫描仪P50对于远程扫描工作，Leica RTC360and theLeica BLK360。For the topographic survey, surveyors on site usedLeica Nova TS60,Leica GS18TandLeica Icon ICR80geodetic devices.

Thanks to its range of 1 km and accuracy of 1 mm, the ScanStation P50 was able to capture detailed, accurate data across large areas, fast. Meanwhile, the RTC360 and BLK360 laser scanners captured the isolated and inaccessible areas under the berth where operating a larger tripod-mounted 3D scanner was not viable. The flexibility of these smaller scanners meant the equipment could be securely lowered into place - a technique previously tried and tested when capturing the Hyosung Vina Chemicals port.

Virtual site visits

整个区域跨越约30公顷，团队需要从大约一百个位置进行扫描，将数据结合在一起并将其快速转移到现场到办公室。在该地区不可预测且不断变化的热带气候中，数据的快速捕获和传递至关重要。

Based on their previous experience working with the technology, Portcoast again selected theLeica InfinityandLeica Cycloneoffice software to act as a digital bridge between site and office. Requiring just one second to transfer data the field and office, teams could then view the data in real time, working in synchronisation with the field team.

Portcoast的Hoang Hiep博士解释说，“The Leica Geosystems equipment helps us to avoid delays in-field data processing and using Leica Geosystems’ software we can check the points every time we need to. With the new total station and GNSS equipment - the flow between the field and office is seamless, helping the engineers to reduce the time between the two places. The high speed and accuracy of the data is why Leica Geosystems’ equipment is our first choice.”

Using the data, Portcoast built the point cloud model for the whole port incorporating all the information from each element into the BIM model. The accuracy of data capture means the user can experience the project through VR/AR. The team is able to carry out quality checks on the locations to inspect details, such as the inclination and rotation angle around the vertical axis of the piles under the berth using the point cloud. Thanks to the precision of the model, the clients and site supervisors can now monitor all the survey data without visiting the construction site.

Building a legacy

Not only will the digital twin continue to add value long into the future, but in carrying out this work the team have also built a legacy of expertise in Vietnam. Portcoast’s pioneering approach has meant that several new Leica Geosystems devices, such as the Leica Nova TS60, Leica GS18 T, Leica iCON iCR80 have been used for the first time in Vietnam and Southeast Asia.

The practical experience working with these devices will reduce the operational risk for Portcoast when using them on similar projects in the future, and Portcoast will also pass on their experience through a wider training programme.

Portcoast的Hoang Hiep博士评论说，“Thanks to the durability and effectiveness of the Leica Geosystems products, combined with the training and support from Leica Geosystems, we have been able to save manpower costs on projects such as this. After the training course, we started using the equipment and are now able to pass this expertise on to others. We are training the whole team to ensure everyone in our company is fully informed about 3D laser scanning. To scan and process data are part of our everyday work at Portcoast.”