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GT1-A Inclinometer Casing

Category: Geotechnical & Civil Engineering Instrumentats

SELF-ALIGNING COUPLINGS

COMPATIBLE WITH ALL INCLINOMETER PROBES

MANUFACTURED TO TIGHT TOLERANCE

GTI-1A inclinometer casings are made of extruded ABS. The alignment key engages the internal alignment groove of the coupling. Couplings are assembled with solvent cement and rivets

 

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The GT1-A inclinometer casing is an extruded ABS pipe with four internal orthogonal grooves and an external alignment key. When installed in a borehole, one set of grooves is aligned in the anticipated direction of movement. The grooves act as guides for the wheels of the inclinometer probe, maintaining the orientation of the probe as it traverses the casing.

 

The alignment key of the GT-1A inclinometer casing engages the internal alignment groove of the coupling. Couplings are assembled with solvent cement and rivets.

 

Spiral surveys may be performed on deep installations, or where high accuracy is critical. Spiral data allows inclinometer data to be corrected for twisting of the casing that may occur during installation.

 

Guiding

 

Probe guidance is ensured by four 3-mm internal grooves spaced 90 degrees apart. The high accuracy guidance achieved with the GT1-A casing produces quality measurements similar to those obtained with other high quality casings. The orientation accuracy is affected more by the measuring equipment itself than by the casing.

 

Installation

 

Axial deformation: GT1-A casing length must be assembled so that no gap exists between the coupling and the casing. The standard GT1-A casing is not suitable for highly compressible soils. In these cases, GEO-LOK telescoping casing are required. The ratio of the effective section versus the total external section entails an equivalent modulus elasticity of 1000 MPa.

 

Sealing and grouting: Sealing method and grout composition are generally defined by the user. The GT1-A casing can withstand an external grout pressure greater than a 50-meter column of cement grout, provided that the casing is filled with water. Deeper installation will require grouting in stages.

 

Specifications

 

  CASING  
  OD   60 mm
  Minimal ID   48.5 mm
  Groove ID   54 mm
  Standard length   3 m
  Material   ABS
  Weight   0.8 kg/m

 

 

  COUPLING  
  OD   68 mm
  ID     60 mm
  Standard length   350 mm
  Weight   0.270 kg

 

 

     TOP AND BOTTOM CAPS  
   Material     ABS and PVC

 


Ordering Info

 

Please specify:

  •     Quantity of 3m sections
  •     Quantity of couplings
  •     Quantity top and bottom caps