战斗时间和潮汐，以平价为3D的5公顷沿海建筑工地

Author: 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.

该开发项目的最后一项任务之一是港口的液化石油气码头的建造。在海洋，水路和运输基础设施中拥有30多年的经验，Portcoastare Vietnam’s leading port and coastal survey consultants. The company was engaged in creating the 3D mapping for the topographic survey, the as-built model of the LPG jetty and facilities, and to conduct the inspection report for the revetment protecting the jetty.

The topographic survey covered an area of over 5 hectares – and with much of the area located in the water, Portcoast’s level of specialist knowledge and experience was essential for collecting data in these hard-to-reach areas. To compound the inaccessibility challenges, whilst some areas of the complex were still under construction, others were already operational.

该项目的Portcoast团队负责人Hoang Hiep博士评论了“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.”

To mitigate the challenges of working in this disruptive, heavy traffic environment, Portcoast decided to conduct the scans from elevated locations above the internal road.

Portcoast的Hoang Hiep博士解释说，“Working from high above the site required a scanner which could deliver a high level of precision over a long measurable range. The Leica ScanStation P50 delivered an accuracy of up to 3mm so we could cover the full range with confidence and precision.”

Whilst theScanStation P50被用来捕获桥顶上的数据，在团队使用特殊修改的设备的桥下，例如定制的起重机来安装Leica RTC360和徕卡BLK360在复合物，狭窄且无法接近的区域中测量和捕获高度详细的数据，例如液体罐，管道系统，进入桥和海洋装载臂。

Time is money

承诺为该地区提供巨大的经济利益，据估计，该项目在建设过程中就为大约2,000名工人创造了就业机会。一旦完成，该港口估计每年为州预算贡献8000万美元，因此必须确保港口能够尽快完全运行。因此，速度是选择Portcoast设备和培训团队使用此设备的关键因素。

“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,”Hoang Hiep博士解释说。

Enhancing collaboration between site and data analysis office

为了扫描端口，Portcoast需要结合数千点并将来自不同设备的数据组合，例如总站，GNSS和激光扫描仪 - 通常证明这是一个非常复杂且耗时的过程。bob appleLeica Geosystems的设备和软件解决方案的无缝集成意味着可以在处理数据和现场团队的异地团队之间很容易传递数据。

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 the狮子旋风,狮子旋风3DR和Leica Infinityoff-site to process the data.

“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,”Hoang Hiep博士补充说。

“旋风产生的结果图是一个非常准确的模型，我们可以用来创建3D模型和VR系统。然后，我们可以进一步完善模型以提供高水平的准确性和可见性。”

By collecting point cloud data at different times and usingLeica CloudWorx for Revitto convert this into as-built drawings, the margin (a matter of millimetres) for settlement or displacement of the pipe racks could be estimated with the utmost precision.

The as-built drawings and BIM will support the Facilities Management aspect of the port providing a reference for the inspection report and enabling Hyosung to plan and model future developments and renovations for the port using the digital model.

The work that took the team of seven engineers just weeks to complete will significantly reduce the site visits required for future maintenance and can be used to enhance and protect the operations of the port for decades to come.

“When we took on this project, only half of the team had any prior experience with this geodetic equipment. The increased efficiency from the integration across the Leica Geosystems product ecosystem saved considerable time, and now the whole team is eager to use the Leica Geosystems geodetic equipment regularly,” concluded Dr. Hoang Hiep.