Objective

High-precision GNSS-based GPS monitoring solution for continuous tracking of bridge tilt and vertical deflection with millimetric accuracy. 3D displacement monitoring of bridge decks and piers enables early warning systems and proactive structural assessment.

Challenge

Bridges are subject to subtle, long-term movements due to thermal variations, traffic loads, material fatigue, and aging. Detecting these changes early is critical to prevent deterioration and ensure structural integrity.

Solution

QUAD-S Monitoring offers continuous monitoring solutions using high-precision GNSS-based GPS sensors, capable of tracking 3D displacements of bridge decks and piers with millimetric accuracy. This approach enables asset managers to detect trends, assess behavior under load, and take proactive measures.

Methodology

Installation of GPS sensors on selected structural points: deck extremities, piers, and key spans. Position tracking every 60 minutes, with data processed and corrected for thermal and satellite variations. Web-accessible dashboard for reviewing movements and setting threshold-based alerts. Optionally integrated with additional SHM tools (e.g. strain gauges, inclinometers) for broader system coverage.

Application Conditions

Requires clear sky view and reliable network connection (4G or satellite).
Sensors are weatherproof (IP68) and operate in extreme environmental conditions.

Monitoring System

Sensors

Results

Bridge owners and operators can gain continuous, reliable insights into tilt and vertical deflections, supporting early warning systems and maintenance planning.

Advantages

Non-intrusive, high-accuracy 3D displacement tracking
Continuous, remote monitoring with minimal maintenance
Scalable to various bridge types and structural configurations
Allows informed decision-making based on real-time data trends

Project Gallery

Bridge spanning across the river

Bridge monitoring with GPS position sensors near vegetation

GPS sensor installation on bridge structure with monitoring equipment

Continuous Monitoring of Tilt and Deflection Using GPS Sensors

Quick Summary

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