Tunneling

Monitoring underground and surface displacements during construction of tunnels is a basic part of design, based on rock and soil mechanics. Monitoring the displacements, controlling and verifying the design assumptions and risk management are essential in order to minimize ground failure and damage to adjacent buildings.

Featured Products	Use and Purpose	Catalog Nomber/ Image Nomber
Geodetic target	Monitoring the deformation at the tunnel circumference. Targets are installed as close as possible to the excavated face.	ERT-10B
VW strain gauge	Measures stresses on steel arches and beams. For initial support of tunnels & shafts.	EDS-20V-AW
Crack/Joint meter	Monitoring  the development of cracks within the tunnel’s lining, buildings, bridges or natural joints	EDJ-40-V
Mechanical Extensometer	Monitoring deformations of the disturbed rock mass adjacent to the tunnel circumference.	EDS-63 U/D
Electronic Extensometer	Monitoring the deformations of the disturbed rock mass adjacent to the tunnel circumference. A continuous and remote DAQ is optional.	EDS-70V
Flat Jack	Evaluation of deformation modulus and in-situ stresses
Image Oriented Borehole Televiewer	Spatial & quantity analysis of joint systems and bedding inclination. Installation of the viewer in boreholes during the site investigation phase.
Single/Double Packer	Analysis of Lugeon values, for the characterization of the rock mass permeability. Installation in boreholes during the site investigation phase of underground hydraulic projects.