Profile Monitoring System for Tunnel Concrete Segments

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The RST Profile Monitoring System for Tunnel Concrete Segments is a series of tilt meters, fixed to the tunnel wall on each of the precast concrete segments erected in place as tunnel lining by a Tunnel Boring Machine (TBM).

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Overview

The RST Profile Monitoring System for Tunnel Concrete Segments is a series of tilt meters, fixed to the tunnel wall on each of the precast concrete segments erected in place as tunnel lining by a Tunnel Boring Machine (TBM). The system is based on the assumption that each concrete segment is a rigid body and that the complete ring deforms by rotation of the individual segments one relative to the other, and the rotation points are the contact surfaces between adjacent segments.


PROFILE MONITORING SYSTEM SENSOR SPECIFICATIONS

ITEM* SPECIFICATION
Range ±15°
Resolution ±2 arc sec. (±0.0006°) (0.01 mm/m)
Non-linearity ±0.0125% F.S. (±0.002°) (0.03 mm/m)
Repeatability ±0.0125% F.S. (±0.002°) (0.03 mm/m)
System Accuracy 1 mm convergence typical
Sensor MEMS (Micro-Electro-Mechanical Systems) Accelerometer,
Digital Bus, Uniaxial
Operating Temp. -40 to 85°C (-40 to 185°F)

*Tilt sensor parameter

Profile Monitoring Systems for Tunnel Concrete Segments are commonly used to:

  • Monitor the convergence of precast concrete segments in TBM-driven tunnels during construction for control and safety.
  • Monitor tunnel deformation due to nearby construction activities.
  • Monitor long-term deformation and performance of existing tunnels.

Profile Monitoring System for Tunnel Concrete Segments Ordering Info

ITEM PART #
MEMS Concrete Segment Tiltmeter – Bussed, interconnected cable ICTCCST
4 conductor, 22 gauge polyurethane jacketed cable EL380004
Detailed cross sectional drawing of each instrumented segment.
Plan layout of instrumented segments, and readout location.
Open or closed loop system.

 

READOUTS & DATA LOGGERS ORDERING

ITEM PART #
GeoViewer Software ELGL5000
flexDAQ Data Logger System

 

System Components

Tilt sensor assembly.
Single interconnected, cable between tilt sensors and to the data logger.
Connectors on each tiltmeter for easy assembly and installation.
Reference pin comes with tape extensometer connector.
Data logger system.
GeoViewer software.
Manual.

File Name

Profile Monitoring System for Tunnel Concrete Segments

Resource Type

Brochure
Language Version Download
English EXB0015H
Spanish ICB0056C

Speak with an Expert

I’m very happy with the quality of the instrumentation and technical support from RST, as always. They worked with us from the initial stages of the project to ensure that we were fully prepared and equipped to use the RSTAR network for the first time. They delivered everything within the tight project time frame to ensure that there were no delays on site, and the submersible tilt meters looked like new even after over twelve months of being submerged in Thames water!
 
-Richard Lipscombe, BEng (Hons), Director & Principle Consultant - RL Geotechnical Ltd