Vibrating Wire NATM Stress Cells

Brochure
Manual

DESCRIPTION

RST Vibrating Wire NATM Stress Cells are designed to measure stresses in concrete (shotcrete) linings in tunnels and other underground workings. They feature a higher stiffness than Earth Pressure Cells, and are therefore more suitable for stress measurement in concrete.

The instrument name is associated with New Austrian Tunneling Method (NATM), which is also known as Sprayed Concrete Lining (SCL) and Sequential Excavation Method (SEM). Monitoring of radial and tangential stresses within and on shotcrete lining, along with measurement of tunnel convergence and deformation is an integral, very important part of the method and its successful implementation.

APPLICATIONS

To monitor pressure on, and within, linings of tunnels and underground workings.

QUICK SPECS

  • Type: Vibrating wire
  • Overrange: 200% F.S.
  • Accuracy: ± to 0.1% F.S.
  • Resolution: ± 0.025% F.S. minimum
  • Signal Output: 2000-3000 Hz

VIEW ILLUSTRATIONS ON HOW THIS IS USED FOR: