PRECISION GEOTECHNICAL MONITORING

English (United Kingdom)Slovenčina (Slovenská republika)
Sunday, 26 May 2019
Measurements by adjustable deformeter

Purpose: By sliding deformeter axial deformation can be monitored (shortening or extension) along a straight line, represented by especially equipped vertical borehole in rock environment. The measuring instrument is a portable probe and measurements are carried out in stages. The most common application is the monitoring of hydraulic engineering constructions, tunnels and the issues of building foundation (suspension/deconsolidation and compression of the subsoil in the deep construction pits).

Description of the system: Deformetric measuring system consists of the measuring tube, probe, carrier power cable, control rod rig, guide-bar, reading unit and the calibration facility. The measuring tube is composed of deformetric plastic casing pipes connected to each other in sewed telescopic connections in one meter distances. The space between the measuring pipe and the wall of measuring borehole is filled with bentonite-cement suspension, which formulation corresponds to properties of rock mass environment. Portable measuring probe retracts gradually into the borehole, which make it possible the guides in the measuring marks. In each interval (1 m) the measuring probe shall be rotated on 45° using rod rig and tension is applied between the two adjacent markers to measure their mutual distance. The signal from the highly-sensible gauge is transmitted by cable and digitally registered. In case of need of three-vector measurements it is possible to equip the borehole with combined inclinometric-deformetric profiles and the measurements can be carried out at the same time in one stage by inclinometer and sliding deformeter.

Specifications: 

Measuring base:

Measurement range:

Temperature range:

 1000 mm

± 50 mm / resolution 0,01 mm per 1000 mm

-20°C to 50°C

 

Posuvný deformeter - sondaSliding deformeter probeposuvny_deform_profil_thumbCasing for sliding deformeterAplikácia posuvného deformetraSliding deformeter installation

Measuring base:

Measurement range:

Temperature range: