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Multi-Point Vibrating Wire Inline Extensometer
Multi-Point Vibrating Wire Inline Extensometer
Multi-Point Vibrating Wire Inline Extensometer head and anchor Multi-Point Vibrating Wire Inline Extensometer extensions joined by coupler (left) and bottom anchor (right)

VIBRATING WIRE INLINE EXTENSOMETER

CATEGORY > Extensometers + Compressometers

VIBRATING WIRE INLINE EXTENSOMETER

DESCRIPTION

The Vibrating Wire Inline Extensometer is used to determine the stability and movement behavior of soil, rock, and concrete structures. The main advantage of the extensometer is that it has no electrical head protruding out of the borehole, contrary to conventional multi-point borehole extensometers (MPBX). The Inline Extensometer is installed flush with the borehole collar or ground surface and measures movement at different depths in the borehole.

By construction, all displacement transducers are located in the borehole in sealed head/anchor assemblies that are inserted in the borehole and separated by extension sections which can be of variable length depending on the required measurement depths. The extension sections consist of rigid 3/8 inch (9.5 mm) stainless steel rods protected by a telescopic outer 21/32 inch (16.8 mm) PVC pipe. The larger diameter of the rigid rod is an additional advantage as compared to the usual 1/4 inch (6.35 mm) of conventional MPBXs, as it provides more accuracy in the measured displacements, both in case of extension and compression movements.

As all displacement transducers are in series in the borehole, the total measurement range of the extensometer is the sum of the individual measurement ranges of each transducers. This allows to measure considerably larger movements than conventional MPBXs while using lower cost standard range transducers.

APPLICATIONS

Ground movements around tunnels.


Deformation of concrete piles (tell-tales).


Deformations of dam abutments and foundations.


Ground movement behind retaining walls, sheet piling, slurry walls, etc.


Ground movements in the walls of open pit mines.


Fracturing in the roofs and walls of underground caverns.


Subsidence above tunnels and mine openings.


Settlement and heave of foundations in soft soil.

QUICK SPECS

Flush with surface: no electrical head protruding out of borehole.


Suitable for extension and compression movements.


Suitable for remote reading and data logging.


Can be installed in 3” (76.2 mm) boreholes.


In-line construction: head/anchors assemblies and extension sections of variable length are inserted in series in the borehole.


Rigid 3/8 inch (9.5 mm) inner stainless steel rod provides more accurate displacement measurement.

BENEFITS

Increase Safety


Increase Productivity


High Accuracy


High Reliability

DESCRIPTION

The Vibrating Wire Inline Extensometer is used to determine the stability and movement behavior of soil, rock, and concrete structures. The main advantage of the extensometer is that it has no electrical head protruding out of the borehole, contrary to conventional multi-point borehole extensometers (MPBX). The Inline Extensometer is installed flush with the borehole collar or ground surface and measures movement at different depths in the borehole.

By construction, all displacement transducers are located in the borehole in sealed head/anchor assemblies that are inserted in the borehole and separated by extension sections which can be of variable length depending on the required measurement depths. The extension sections consist of rigid 3/8 inch (9.5 mm) stainless steel rods protected by a telescopic outer 21/32 inch (16.8 mm) PVC pipe. The larger diameter of the rigid rod is an additional advantage as compared to the usual 1/4 inch (6.35 mm) of conventional MPBXs, as it provides more accuracy in the measured displacements, both in case of extension and compression movements.

As all displacement transducers are in series in the borehole, the total measurement range of the extensometer is the sum of the individual measurement ranges of each transducers. This allows to measure considerably larger movements than conventional MPBXs while using lower cost standard range transducers.

QUICK SPECS

Flush with surface: no electrical head protruding out of borehole.


Suitable for extension and compression movements.


Suitable for remote reading and data logging.


Can be installed in 3” (76.2 mm) boreholes.


In-line construction: head/anchors assemblies and extension sections of variable length are inserted in series in the borehole.


Rigid 3/8 inch (9.5 mm) inner stainless steel rod provides more accurate displacement measurement.

APPLICATIONS

Ground movements around tunnels.


Deformation of concrete piles (tell-tales).


Deformations of dam abutments and foundations.


Ground movement behind retaining walls, sheet piling, slurry walls, etc.


Ground movements in the walls of open pit mines.


Fracturing in the roofs and walls of underground caverns.


Subsidence above tunnels and mine openings.


Settlement and heave of foundations in soft soil.

BENEFITS

Increase Safety


Increase Productivity


High Accuracy


High Reliability

CONTACT US

RST Instruments Ltd.

11545 Kingston Street
Maple Ridge, BC
Canada V2X 0Z5

604-540-1100

1-800-665-5599

Fax: 604-540-1005

info@rstinstruments.com

CONNECT WITH RST

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ASK A QUESTION

CONTACT US

RST Instruments Ltd.

11545 Kingston Street
Maple Ridge, BC
Canada V2X 0Z5

604-540-1100

1-800-665-5599

Fax: 604-540-1005

info@rstinstruments.com



CONNECT WITH RST

Linkedin icon
Youtube icon

ASK A QUESTION

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