Non-Contact Monitoring Throughout the Tunnel Lifecycle

Haytham’s tunnel monitoring solution uses the Online Visual Tracking System, passive targets, active illumination, data transmission, and a cloud platform for continuous monitoring during construction, operation, and nearby construction activities.

Tunnel Convergence · Crown Settlement · Clearance Change · Lining Deformation

Non-Contact Visual Monitoring

Using oblique optical-axis imaging and sub-pixel tracking, the system remotely measures 2D displacement at multiple points.

Active illumination enables stable monitoring in dark and dusty tunnel environments.

Key Features

▪ Non-Contact Measurement
Remote monitoring without interrupting tunnel operation.

▪ Multi-Point Monitoring
One system can monitor multiple points and tunnel sections.

▪ Sub-Millimeter Accuracy
High-precision displacement measurement under suitable conditions.

▪ Active Illumination
Reliable imaging in dark tunnel environments.

▪ Real-Time Alerts
Automatic threshold alerts via the cloud platform.

▪ Sensor Integration
Supports vibration, settlement, rock pressure, leakage, temperature, and humidity data.

Monitoring System

Visual Sensing → Data Transmission → Cloud Platform → Early Warning

Supports fiber, Ethernet, and 4G/5G communication, with real-time dashboards, historical trends, report export, and API integration.

Applications

▪ Construction Monitoring
Tunnel convergence and crown settlement during excavation.

▪ Long-Term Monitoring
Continuous monitoring of tunnel deformation during operation.

▪ Nearby Construction Monitoring
Track deformation caused by excavation, crossing, or adjacent construction.

▪ Metro & Shield Tunnels
Monitor segment displacement, joint opening, convergence, and differential settlement.

▪ Existing & Damaged Tunnels
Non-contact monitoring with minimal disturbance.

▪ Emergency Inspection
Portable systems for rapid inspection and post-event assessment.