Bridge Renewal Using 3D Point Cloud Modeling
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Solution Overview
Problem
Current bridge renewal methods require traffic restrictions, leading to congestion and prolonged work periods due to the need for on-site surveys and manual design processes.
Innovation Solution
A method and system that utilize above-deck and below-deck point cloud data to create a 3D model of the existing bridge, allowing for simulated design and production of new deck slabs without on-site traffic disruption, using unmanned aerial vehicles and mobile robots for data acquisition, and a support system for efficient design and construction planning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If on-site survey and manual design processes are used, then design accuracy is improved, but work period is prolonged
Solution Approach 1:
The patent replaces manual on-site surveying and measurement processes with automated 3D laser scanning technology. The laser scanner captures point cloud data of the existing bridge structure, eliminating the need for manual measurements while maintaining or improving measurement accuracy. This substitution of mechanical/manual operations with automated optical measurement systems directly reduces survey time while preserving precision.
Solution Approach 2:
The patent creates a digital 3D model (copy) of the existing bridge structure through laser scanning point cloud data. This digital replica serves as the basis for all subsequent design and planning work, eliminating the need for repeated on-site reference to physical structures. The digital model can be manipulated, measured, and analyzed indefinitely without requiring return visits to the construction site, significantly reducing time loss.
2Reliability
If traffic restrictions are imposed during renewal work, then construction safety is improved, but traffic congestion occurs
Solution Approach 1:
The patent performs all surveying, measurement, and design planning activities before construction begins, using 3D laser scanning and digital modeling. By completing the design phase off-site and in advance, the actual construction work can proceed more quickly with pre-planned operations, reducing the duration of traffic restrictions needed while maintaining safety through thorough preliminary preparation.
3Adaptability or versatility
If manual design and layout processes are used, then design flexibility is improved, but productivity is reduced
Solution Approach 1:
The patent transforms the design process from manual 2D drafting to automated 3D digital modeling using point cloud data. This parameter change in the design methodology allows for rapid iteration and modification of design parameters within the digital environment, maintaining flexibility while dramatically increasing productivity. The 3D model can be easily adjusted, visualized, and coordinated with construction requirements without the time-consuming nature of manual redrawing.
Data Source
AI summary
A method of renewing a bridge includes: by a support system configured to support renewal of the bridge in which multiple deck slabs are disposed side by side in a bridge axis direction, acquiring above-deck point cloud data of an existing bridge and below-deck point cloud data of the existing bridge; combining the above-deck point cloud data and the below-deck point cloud data to create a 3D model of the existing bridge; and creating design data of a new deck slab by laying out the new deck slab by a simulation based on the 3D model of the existing bridge and a layout rule.