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Tunnel Shotcrete Verification using Scan Data

Utilizing laser scanning data from a Trimble TX8, this Trimble Business Center project demonstrates how to perform tunnel construction control for excavation, shotcrete, and final lining in a NATM/SEM tunnel.

Verifying the tunnel construction process is an important part of a tunnel surveyor's job. Whether it is checking the excavation for proper over and underbreak levels or assessing shotcrete layers for thickness and undulation, surveyors need the right tools to get the job done efficiently and effectively. By utilizing Trimble 3D laser scanning technology in the field, high fidelity data can be collected rapidly to ensure the tunnel construction crews can keep working. Within TBC, the scan data can be automatically geo-referenced and classified, reducing technician’s time to create the final inspection report.

This dataset contains two point clouds from Trimble 3D laser scanners and a tunnel design template and alignment hosted in a TBC project. Using the TBC Tunneling module, the scan datasets, which represent an excavation and shotcrete layer, can be turned into 3D meshes for visualization and comparison. The inspection workflow provides detailed heat map deliverables to verify the shotcrete thickness and smoothness. This sample dataset demonstrates a variety of functions from the TBC Tunneling module, such as design tools, point cloud visualization, heat map inspection, and reporting.

Watch this video tutorial to learn about the new Inspection Workflow in TBC Tunneling v5.40. Don’t have Trimble Business Center? You can download an unlicensed version here.

Find out more about Trimble Tunneling Solutions on our website tunneling.trimble.com.

To download the dataset, please fill in the form on this page.

Inspection View

Multiple designs

Mesh

Color Map

Tags: Tunneling, As-Built, Survey, Laser Scanning, Shotcrete, TBC, Trimble Business Center, 3D Mesh

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Geospatial

Trimble Geospatial provides solutions that facilitate high-quality, productive workflows and information exchange, driving value for a global and diverse customer base of surveyors, engineering and GIS service companies, governments, utilities and transportation authorities. Trimble's innovative technologies include integrated sensors, field applications, real-time communications and office software for processing, modeling and data analytics. Using Trimble solutions, organizations can capture the most accurate spatial data and transform it into intelligence to deliver increased productivity and improved decision-making. Whether enabling more efficient use of natural resources or enhancing the performance and lifecycle of civil infrastructure, timely and reliable geospatial information is at the core of Trimble's solutions to transform the way work is done.

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