How laser scanning is changing the way FAM Construction (Ferrovial – Allan Myers) collects site information on their roadway projects

作者：弗兰克·科拉索（Frank Collazo）

Washington D.C. has some of the worst traffic congestion in the USA. Along with relieving congestion, improving safety, and moving 2,000 to 4,000 more people hourly, this 22-mile roadway expansion project will transform this critical Northern Virginia artery by adding two additional express lanes, three regular lanes in each direction, interchange enhancements, toll roads, park and ride lots and shared use paths.

借助3D激光扫描, this project is changing the wayFAM Construction收集站点信息，报告更改并确保一切都在设计公差之内。

FAM的调查经理Gabriel Jimenez Lopez说“With scanning, I don’t have to imagine anything, it is a highly accurate 3D picture of the construction site sitting on my laptop, better yet, I don’t have to rely on someone’s interpretation of what they think is a break-line or an important feature, and best I don’t have to question if they picked up a critical piece of data. Everything is there all the time”.

Field Crew

2-person crew setting control with a Leica GS18 T, while placing the RTC360 3D laser scanner on a tripod. Total time per setup; 2 minutes 30 seconds.

两个扫描机组人员每个配备了Leica RTC3603D laser scanner, tablet computer with theLeica Cyclone FIELD 360 app,Leica CS20控制器和Leica GS18 tGNSS智能天线。他们是独立于其他测量师的独立人物，因此不需要全站协调，也无需计划在哪里设置控制。

现场工作流程

包括以每次设置30秒的RTK模式设置一个控制点，然后使用Cyclone Field 360 App在中等分辨率扫描并获取HDR Imagery：大约1分钟51秒进行扫描和图像。基本上，在字段中按两个点，一个在CS20上进行控制，另一个在Cyclone Field 360应用程序上进行扫描，然后冲洗并重复。在导入过程中，使用自动提取控制在办公室中提取控件。

When a project calls for higher accuracy, such as monitoring structures and steel, GNSS RTK control is supplemented with total station control.

Office

Scans are imported intoCyclone REGISTER 360并检查。无需注册或地理参考，因为这是通过Cyclone Field 360应用程序在字段中完成的。只需导入，检查质量，根据需要调整，然后导出点云并使用旋风3drfor the many applications it offers. Weather it is checking verticality, auto-extracting ground to create TIN, volume calculations, creating cross-section reports, or checking as-built vs design, Cyclone 3DR covers all this for FAM.

In addition to topo’s FAM uses scanning for:

• Earthwork calculations
• Monitor retaining walls - check from week to week to ensure movement did not occur
• 桥梁甲板在建造过程中为新的和扩展的桥梁工作，以确保满足设计公差
• 高精度测量库存量
• 检查H-Piles的垂直度（即钢）
• Sharing data with other departments i.e. their Construction Technical Office over internet usingTruView
• 分水岭分析
• 桥梁清除
• 检查现有桥梁的结构损坏以维修

观看视频以查看行动中的项目。

Scan of retaining wall with control point

FAM不要一次通过总站检查一次测量的高程和垂直度，而是用RTC360在几分钟内检查数百个H-Piles