Arch Installer IoT: How to Trace Tunnel Support Construction Progress?
Arch installers (arch-setting jumbos) are key equipment in tunnel support construction, responsible for precisely placing steel arches at their designed positions — which determines both support quality and construction pace. Unlike drilling or shotcreting, arch installation carries lifetime quality liability: a misplaced or missing arch can trigger a cave-in liability claim years later. In practice, however, support progress relies on daily reports, quality on inspector photos, and process handoffs on walkie-talkies — the traceability chain breaks on paper. This article breaks down how JGY uses an IoT solution to make arch-installer progress traceable and quality documented.
Three Pain Points of Arch Installer Management
- Support progress hard to trace: How many arches were set today? At what cumulative chainage? The inspector's daily report never matches actual work — settlement and progress accounting turn into arguments.
- Quality hard to document: Arch spacing, verticality, and installation time leave nothing to check later. If a quality problem or accident triggers a liability review, the original work records are nowhere to be found.
- Process coordination is hard: Excavation → mucking → support → shotcrete — arch installation sits in the middle, handoff to the preceding drill and following shotcrete steps relies on shouting on site, and one slip in rhythm stops the whole tunnel.
The JGY solution combines the YOOAI-GC-DT-CTF T-BOX with the device management platform to tackle each problem in turn.
Hardware Layer: T-BOX Captures Every Work Record
The key to the arch-installer solution is using the T-BOX to capture both conditions and positioning, so work records document themselves:
| Capability | Implementation | What it solves |
|---|---|---|
| Condition | CAN bus reads hydraulic action, feed/slew, work hours | Objective per-arch time and duration |
| Multi-GNSS | GPS + BeiDou + GLONASS + GALILEO | Which tunnel line, which chainage |
| Work records to cloud | Each operation auto-generates a timestamped record | Progress traceability, quality documentation |
| 4G upload | Full-network 4G, backfill on tunnel exit / via portal relay | No data loss, no record gaps |
| FOTA upgrade | 4G remote firmware | Protocol updates without factory return |
Wide voltage 9–36V, -20°C to +70°C, anti-static and anti-surge — built for the damp, dusty tunnel. Relay output also supports remote locking for rental or subcontractor risk control. For projects with strict verticality requirements, a CAN inclinometer can be added to monitor arch attitude.
Platform Layer: Progress Traceability + Quality Documentation + Process Coordination
1. Progress Traceability: A Record for Every Arch
The device management module uploads each arch installer's work records with timestamps: power-on time, work duration, cumulative arches set, current chainage. Open the dashboard and you immediately see:
- How many arches were set today on this line, cumulative position
- Which unit is working, which is on standby
- Full work detail for any historical day, replayable on demand
Support is a lifetime-liability process. Without traceable work records, post-incident liability reviews have no source to draw from.
2. Quality Documentation: Time, Position, and Conditions Aligned
Each arch's installation time, located chainage, and hydraulic condition curve are bound and archived — cross-verifiable against inspector logs and design drawings. If a quality issue or accident investigation arises, pull the records to reconstruct the original work state, with clear liability.
3. Process Coordination: Handoff with Drilling Before and Shotcrete After
The data dashboard shows the real-time status of all process equipment on a single tunnel in one view. The rhythm of the support step (when the arch installer is in position, when it finishes) lines up against the preceding drill and following shotcrete — the bottleneck process of the whole tunnel is visible at a glance, and dispatch upgrades from "shouting on site" to "data-driven coordination."
4. Geofencing: Anti-Cross-Section Use
Draw one geofence per section. An arch installer leaving its section without approval triggers an immediate alert, preventing subcontractors from redeploying equipment across sections. The geofence log inside device management keeps a full trail.
Maintenance Reminders: Keeping Support Equipment Running
Arch installers have complex hydraulic systems. The maintenance management module auto-reminds by work hours — hydraulic oil changes, structural inspections, electrical system servicing — minimizing unplanned downtime and keeping the support step's rhythm uninterrupted.
Implementation Tips
- Align CAN protocol first: Arch installers span drill boom / gripper / feed subsystems — confirm message definitions with the manufacturer before installation.
- Geofences per section: One geofence per section for per-project stats and anti-cross-section use.
- Link work records to inspector logs: Bring T-BOX timestamped records into daily quality briefings to build a documentation habit.
- Add inclinometers as needed: For projects with strict verticality, add a CAN inclinometer to monitor arch attitude.
Who It's For
- Tunnel construction general contractors (support-step progress and quality control)
- Arch-installer rental / subcontracting specialists (documented work volume for settlement)
- Arch-installer OEMs (remote monitoring as a smart selling point)
JGY's construction industry solution has served multiple tunnel construction customers. To build an IoT solution that makes your arch-installer progress traceable and quality documented, contact us.